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Optimize expression evaluation to reduce allocations

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- Implemented pooled slices for function arguments
- Added specialized pooling for variable node and literal node objects
- Modified array and hash node evaluation to reduce allocations
- Optimized test and filter evaluation with pooled resources
- Added comprehensive benchmarks to validate improvements
- Updated node pool implementation to remove duplicate declarations
- Fixed memory allocations in merge filter to correctly handle array manipulations

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
semihalev 2025-03-12 03:04:36 +03:00
commit 435bb12ac3
26 changed files with 4973 additions and 302 deletions
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6
.gitignore vendored
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@ -8,4 +8,10 @@ SOLUTION.md
FINDINGS.md
PROGRESS.md
ZERO_ALLOCATION_PLAN.md
STRING_HANDLING_OPTIMIZATION.md
TOKENIZER_OPTIMIZATION.md
TOKENIZER_OPTIMIZATION_NEXT_STEPS.md
ZERO_ALLOCATION_IMPLEMENTATION.md
RENDER_CONTEXT_OPTIMIZATION.md
EXPRESSION_OPTIMIZATION.md
CLAUDE.md

8
benchmark/MEMORY_RESULTS.md
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@ -1,5 +1,5 @@
## Memory Benchmark Results (as of 2025-03-11)
## Memory Benchmark Results (as of 2025-03-12)
Environment:
- Go version: go1.24.1
@ -8,8 +8,8 @@ Environment:
| Engine | Time (µs/op) | Memory Usage (KB/op) |
|-------------|--------------|----------------------|
| Twig | 0.23 | 0.12 |
| Go Template | 13.14 | 1.29 |
| Twig | 0.20 | 0.12 |
| Go Template | 9.31 | 1.34 |
Twig is 0.02x faster than Go's template engine.
Twig uses 0.10x less memory than Go's template engine.
Twig uses 0.09x less memory than Go's template engine.

263
buffer_pool.go Normal file
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@ -0,0 +1,263 @@
package twig
import (
"fmt"
"io"
"strconv"
"sync"
)
// BufferPool is a specialized pool for string building operations
// Designed for zero allocation rendering of templates
type BufferPool struct {
pool sync.Pool
}
// Buffer is a specialized buffer for string operations
// that minimizes allocations during template rendering
type Buffer struct {
buf []byte
pool *BufferPool
reset bool
}
// Global buffer pool instance
var globalBufferPool = NewBufferPool()
// NewBufferPool creates a new buffer pool
func NewBufferPool() *BufferPool {
return &BufferPool{
pool: sync.Pool{
New: func() interface{} {
// Start with a reasonable capacity
return &Buffer{
buf: make([]byte, 0, 1024),
reset: true,
}
},
},
}
}
// Get retrieves a buffer from the pool
func (p *BufferPool) Get() *Buffer {
buffer := p.pool.Get().(*Buffer)
if buffer.reset {
buffer.buf = buffer.buf[:0] // Reset length but keep capacity
} else {
buffer.buf = buffer.buf[:0] // Ensure buffer is empty
buffer.reset = true
}
buffer.pool = p
return buffer
}
// GetBuffer retrieves a buffer from the global pool
func GetBuffer() *Buffer {
return globalBufferPool.Get()
}
// Release returns the buffer to its pool
func (b *Buffer) Release() {
if b.pool != nil {
b.pool.pool.Put(b)
}
}
// Write implements io.Writer
func (b *Buffer) Write(p []byte) (n int, err error) {
b.buf = append(b.buf, p...)
return len(p), nil
}
// WriteString writes a string to the buffer with zero allocation
func (b *Buffer) WriteString(s string) (n int, err error) {
b.buf = append(b.buf, s...)
return len(s), nil
}
// WriteByte writes a single byte to the buffer
func (b *Buffer) WriteByte(c byte) error {
b.buf = append(b.buf, c)
return nil
}
// WriteSpecialized functions for common types to avoid string conversions
// WriteInt writes an integer to the buffer without allocations
func (b *Buffer) WriteInt(i int) (n int, err error) {
// For small integers, use a table-based approach
if i >= 0 && i < 10 {
err = b.WriteByte('0' + byte(i))
if err == nil {
n = 1
}
return
} else if i < 0 && i > -10 {
err = b.WriteByte('-')
if err != nil {
return 0, err
}
err = b.WriteByte('0' + byte(-i))
if err == nil {
n = 2
}
return
}
// Convert to string, this will allocate but is handled later
s := strconv.Itoa(i)
return b.WriteString(s)
}
// WriteFloat writes a float to the buffer
func (b *Buffer) WriteFloat(f float64, fmt byte, prec int) (n int, err error) {
// Use strconv for now - future optimization could implement
// this without allocation for common cases
s := strconv.FormatFloat(f, fmt, prec, 64)
return b.WriteString(s)
}
// WriteBool writes a boolean value to the buffer
func (b *Buffer) WriteBool(v bool) (n int, err error) {
if v {
return b.WriteString("true")
}
return b.WriteString("false")
}
// Len returns the current length of the buffer
func (b *Buffer) Len() int {
return len(b.buf)
}
// String returns the contents as a string
func (b *Buffer) String() string {
return string(b.buf)
}
// Bytes returns the contents as a byte slice
func (b *Buffer) Bytes() []byte {
return b.buf
}
// Reset empties the buffer
func (b *Buffer) Reset() {
b.buf = b.buf[:0]
}
// WriteTo writes the buffer to an io.Writer
func (b *Buffer) WriteTo(w io.Writer) (int64, error) {
n, err := w.Write(b.buf)
return int64(n), err
}
// Global-level utility functions for writing values with minimal allocations
// WriteValue writes any value to a writer in the most efficient way possible
func WriteValue(w io.Writer, val interface{}) (n int, err error) {
// First check if we can use optimized path for known writer types
if bw, ok := w.(*Buffer); ok {
return writeValueToBuffer(bw, val)
}
// If writer is a StringWriter, we can optimize some cases
if sw, ok := w.(io.StringWriter); ok {
return writeValueToStringWriter(sw, val)
}
// Fallback path - use temp buffer for conversion to avoid allocating strings
buf := GetBuffer()
defer buf.Release()
_, _ = writeValueToBuffer(buf, val)
return w.Write(buf.Bytes())
}
// writeValueToBuffer writes a value to a Buffer using type-specific optimizations
func writeValueToBuffer(b *Buffer, val interface{}) (n int, err error) {
if val == nil {
return 0, nil
}
switch v := val.(type) {
case string:
return b.WriteString(v)
case int:
return b.WriteInt(v)
case int64:
return b.WriteString(strconv.FormatInt(v, 10))
case float64:
return b.WriteFloat(v, 'f', -1)
case bool:
return b.WriteBool(v)
case []byte:
return b.Write(v)
default:
// Fall back to string conversion
return b.WriteString(defaultToString(val))
}
}
// writeValueToStringWriter writes a value to an io.StringWriter
func writeValueToStringWriter(w io.StringWriter, val interface{}) (n int, err error) {
if val == nil {
return 0, nil
}
switch v := val.(type) {
case string:
return w.WriteString(v)
case int:
if v >= 0 && v < 10 {
// Single digit optimization
return w.WriteString(string([]byte{'0' + byte(v)}))
}
return w.WriteString(strconv.Itoa(v))
case int64:
return w.WriteString(strconv.FormatInt(v, 10))
case float64:
return w.WriteString(strconv.FormatFloat(v, 'f', -1, 64))
case bool:
if v {
return w.WriteString("true")
}
return w.WriteString("false")
case []byte:
return w.WriteString(string(v))
default:
// Fall back to string conversion
return w.WriteString(defaultToString(val))
}
}
// defaultToString converts a value to a string using the default method
func defaultToString(val interface{}) string {
return stringify(val)
}
// stringify is a helper to convert any value to string
func stringify(val interface{}) string {
if val == nil {
return ""
}
// Use type switch for efficient handling of common types
switch v := val.(type) {
case string:
return v
case int:
return strconv.Itoa(v)
case int64:
return strconv.FormatInt(v, 10)
case float64:
return strconv.FormatFloat(v, 'f', -1, 64)
case bool:
return strconv.FormatBool(v)
case []byte:
return string(v)
}
// Fall back to fmt.Sprintf for complex types
return fmt.Sprintf("%v", val)
}

155
buffer_pool_benchmark_test.go Normal file
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@ -0,0 +1,155 @@
package twig
import (
"bytes"
"io"
"strconv"
"testing"
)
func BenchmarkBufferWrite(b *testing.B) {
buf := GetBuffer()
defer buf.Release()
longStr := "This is a test string for benchmarking the write performance of the new buffer pool"
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
buf.WriteString(longStr)
}
}
func BenchmarkByteBufferWrite(b *testing.B) {
buf := GetByteBuffer()
defer PutByteBuffer(buf)
longStr := "This is a test string for benchmarking the write performance of the byte buffer pool"
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
buf.WriteString(longStr)
}
}
func BenchmarkStandardBufferWrite(b *testing.B) {
buf := &bytes.Buffer{}
longStr := "This is a test string for benchmarking the write performance of standard byte buffer"
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
buf.WriteString(longStr)
}
}
func BenchmarkBufferIntegerFormatting(b *testing.B) {
buf := GetBuffer()
defer buf.Release()
vals := []int{0, 5, -5, 123, -123, 9999, -9999, 123456789, -123456789}
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
for _, v := range vals {
buf.WriteInt(v)
}
}
}
func BenchmarkStandardIntegerFormatting(b *testing.B) {
buf := &bytes.Buffer{}
vals := []int{0, 5, -5, 123, -123, 9999, -9999, 123456789, -123456789}
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
for _, v := range vals {
buf.WriteString(strconv.Itoa(v))
}
}
}
func BenchmarkWriteValue(b *testing.B) {
buf := GetBuffer()
defer buf.Release()
values := []interface{}{
"string value",
123,
-456,
3.14159,
true,
[]byte("byte slice"),
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
for _, v := range values {
writeValueToBuffer(buf, v)
}
}
}
func BenchmarkStringifyValues(b *testing.B) {
values := []interface{}{
"string value",
123,
-456,
3.14159,
true,
[]byte("byte slice"),
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
for _, v := range values {
_ = stringify(v)
}
}
}
func BenchmarkBufferGrowth(b *testing.B) {
// Test how the buffer handles growing for larger strings
b.Run("Small", func(b *testing.B) {
for i := 0; i < b.N; i++ {
buf := GetBuffer()
buf.WriteString("small")
buf.Release()
}
})
b.Run("Medium", func(b *testing.B) {
mediumStr := "medium string that is longer than the small one but still reasonable"
for i := 0; i < b.N; i++ {
buf := GetBuffer()
buf.WriteString(mediumStr)
buf.Release()
}
})
b.Run("Large", func(b *testing.B) {
largeStr := string(make([]byte, 2048)) // 2KB string
for i := 0; i < b.N; i++ {
buf := GetBuffer()
buf.WriteString(largeStr)
buf.Release()
}
})
}
func BenchmarkBufferToWriter(b *testing.B) {
buf := GetBuffer()
defer buf.Release()
str := "This is a test string that will be written to a discard writer"
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
buf.WriteString(str)
buf.WriteTo(io.Discard)
}
}

166
buffer_pool_test.go Normal file
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@ -0,0 +1,166 @@
package twig
import (
"strings"
"testing"
)
func TestBufferPool(t *testing.T) {
// Test getting a buffer from the pool
buf := GetBuffer()
if buf == nil {
t.Fatal("GetBuffer() returned nil")
}
// Test writing to the buffer
str := "Hello, world!"
n, err := buf.WriteString(str)
if err != nil {
t.Fatalf("WriteString failed: %v", err)
}
if n != len(str) {
t.Fatalf("WriteString returned wrong length: got %d, want %d", n, len(str))
}
// Test getting the string back
if buf.String() != str {
t.Fatalf("String() returned wrong value: got %q, want %q", buf.String(), str)
}
// Test resetting the buffer
buf.Reset()
if buf.Len() != 0 {
t.Fatalf("Reset() didn't clear the buffer: length = %d", buf.Len())
}
// Test writing a different string after reset
str2 := "Another string"
buf.WriteString(str2)
if buf.String() != str2 {
t.Fatalf("String() after reset returned wrong value: got %q, want %q", buf.String(), str2)
}
// Test releasing the buffer
buf.Release()
// Getting a new buffer should not have any content
buf2 := GetBuffer()
if buf2.Len() != 0 {
t.Fatalf("New buffer from pool has content: %q", buf2.String())
}
buf2.Release()
}
func TestWriteValue(t *testing.T) {
buf := GetBuffer()
defer buf.Release()
tests := []struct {
value interface{}
expected string
}{
{nil, ""},
{"test", "test"},
{123, "123"},
{-456, "-456"},
{3.14159, "3.14159"},
{true, "true"},
{false, "false"},
{[]byte("bytes"), "bytes"},
}
for _, test := range tests {
buf.Reset()
_, err := WriteValue(buf, test.value)
if err != nil {
t.Errorf("WriteValue(%v) error: %v", test.value, err)
continue
}
if buf.String() != test.expected {
t.Errorf("WriteValue(%v) = %q, want %q", test.value, buf.String(), test.expected)
}
}
}
func TestWriteInt(t *testing.T) {
buf := GetBuffer()
defer buf.Release()
tests := []struct {
value int
expected string
}{
{0, "0"},
{5, "5"},
{-5, "-5"},
{123, "123"},
{-123, "-123"},
{9999, "9999"},
{-9999, "-9999"},
{123456789, "123456789"},
{-123456789, "-123456789"},
}
for _, test := range tests {
buf.Reset()
_, err := buf.WriteInt(test.value)
if err != nil {
t.Errorf("WriteInt(%d) error: %v", test.value, err)
continue
}
if buf.String() != test.expected {
t.Errorf("WriteInt(%d) = %q, want %q", test.value, buf.String(), test.expected)
}
}
}
func TestBufferWriteTo(t *testing.T) {
buf := GetBuffer()
defer buf.Release()
testStr := "This is a test string"
buf.WriteString(testStr)
// Create a destination buffer to write to
var dest strings.Builder
n, err := buf.WriteTo(&dest)
if err != nil {
t.Fatalf("WriteTo failed: %v", err)
}
if n != int64(len(testStr)) {
t.Fatalf("WriteTo returned wrong length: got %d, want %d", n, len(testStr))
}
if dest.String() != testStr {
t.Fatalf("WriteTo output mismatch: got %q, want %q", dest.String(), testStr)
}
}
func TestBufferGrowCapacity(t *testing.T) {
buf := GetBuffer()
defer buf.Release()
// Start with small string
initialStr := "small"
buf.WriteString(initialStr)
initialCapacity := cap(buf.buf)
// Write a larger string that should cause a grow
largeStr := strings.Repeat("abcdefghijklmnopqrstuvwxyz", 100) // 2600 bytes
buf.WriteString(largeStr)
// Verify capacity increased
if cap(buf.buf) <= initialCapacity {
t.Fatalf("Buffer didn't grow capacity: initial=%d, after=%d",
initialCapacity, cap(buf.buf))
}
// Verify content is correct
expected := initialStr + largeStr
if buf.String() != expected {
t.Fatalf("Buffer content incorrect after growth")
}
}

142
expr.go
View file

@ -179,39 +179,17 @@ func NewVariableNode(name string, line int) *VariableNode {
// NewBinaryNode creates a new binary operation node
func NewBinaryNode(operator string, left, right Node, line int) *BinaryNode {
return &BinaryNode{
ExpressionNode: ExpressionNode{
exprType: ExprBinary,
line: line,
},
operator: operator,
left: left,
right: right,
}
return GetBinaryNode(operator, left, right, line)
}
// NewGetAttrNode creates a new attribute access node
func NewGetAttrNode(node, attribute Node, line int) *GetAttrNode {
return &GetAttrNode{
ExpressionNode: ExpressionNode{
exprType: ExprGetAttr,
line: line,
},
node: node,
attribute: attribute,
}
return GetGetAttrNode(node, attribute, line)
}
// NewGetItemNode creates a new item access node
func NewGetItemNode(node, item Node, line int) *GetItemNode {
return &GetItemNode{
ExpressionNode: ExpressionNode{
exprType: ExprGetItem,
line: line,
},
node: node,
item: item,
}
return GetGetItemNode(node, item, line)
}
// Render implementation for VariableNode
@ -279,6 +257,11 @@ func (n *GetAttrNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a GetAttrNode to the pool
func (n *GetAttrNode) Release() {
ReleaseGetAttrNode(n)
}
// Render implementation for GetItemNode
func (n *GetItemNode) Render(w io.Writer, ctx *RenderContext) error {
container, err := ctx.EvaluateExpression(n.node)
@ -301,6 +284,11 @@ func (n *GetItemNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a GetItemNode to the pool
func (n *GetItemNode) Release() {
ReleaseGetItemNode(n)
}
// Render implementation for BinaryNode
func (n *BinaryNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -313,6 +301,11 @@ func (n *BinaryNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a BinaryNode to the pool
func (n *BinaryNode) Release() {
ReleaseBinaryNode(n)
}
// Render implementation for FilterNode
func (n *FilterNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -325,6 +318,11 @@ func (n *FilterNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a FilterNode to the pool
func (n *FilterNode) Release() {
ReleaseFilterNode(n)
}
// Render implementation for TestNode
func (n *TestNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -337,6 +335,11 @@ func (n *TestNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a TestNode to the pool
func (n *TestNode) Release() {
ReleaseTestNode(n)
}
// Render implementation for UnaryNode
func (n *UnaryNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -349,6 +352,11 @@ func (n *UnaryNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a UnaryNode to the pool
func (n *UnaryNode) Release() {
ReleaseUnaryNode(n)
}
// Render implementation for ConditionalNode
func (n *ConditionalNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -361,6 +369,11 @@ func (n *ConditionalNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a ConditionalNode to the pool
func (n *ConditionalNode) Release() {
ReleaseConditionalNode(n)
}
// Render implementation for ArrayNode
func (n *ArrayNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -373,6 +386,11 @@ func (n *ArrayNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns an ArrayNode to the pool
func (n *ArrayNode) Release() {
ReleaseArrayNode(n)
}
// Render implementation for HashNode
func (n *HashNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -385,6 +403,11 @@ func (n *HashNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a HashNode to the pool
func (n *HashNode) Release() {
ReleaseHashNode(n)
}
// Render implementation for FunctionNode
func (n *FunctionNode) Render(w io.Writer, ctx *RenderContext) error {
result, err := ctx.EvaluateExpression(n)
@ -397,87 +420,42 @@ func (n *FunctionNode) Render(w io.Writer, ctx *RenderContext) error {
return err
}
// Release returns a FunctionNode to the pool
func (n *FunctionNode) Release() {
ReleaseFunctionNode(n)
}
// NewFilterNode creates a new filter node
func NewFilterNode(node Node, filter string, args []Node, line int) *FilterNode {
return &FilterNode{
ExpressionNode: ExpressionNode{
exprType: ExprFilter,
line: line,
},
node: node,
filter: filter,
args: args,
}
return GetFilterNode(node, filter, args, line)
}
// NewTestNode creates a new test node
func NewTestNode(node Node, test string, args []Node, line int) *TestNode {
return &TestNode{
ExpressionNode: ExpressionNode{
exprType: ExprTest,
line: line,
},
node: node,
test: test,
args: args,
}
return GetTestNode(node, test, args, line)
}
// NewUnaryNode creates a new unary operation node
func NewUnaryNode(operator string, node Node, line int) *UnaryNode {
return &UnaryNode{
ExpressionNode: ExpressionNode{
exprType: ExprUnary,
line: line,
},
operator: operator,
node: node,
}
return GetUnaryNode(operator, node, line)
}
// NewConditionalNode creates a new conditional (ternary) node
func NewConditionalNode(condition, trueExpr, falseExpr Node, line int) *ConditionalNode {
return &ConditionalNode{
ExpressionNode: ExpressionNode{
exprType: ExprConditional,
line: line,
},
condition: condition,
trueExpr: trueExpr,
falseExpr: falseExpr,
}
return GetConditionalNode(condition, trueExpr, falseExpr, line)
}
// NewArrayNode creates a new array node
func NewArrayNode(items []Node, line int) *ArrayNode {
return &ArrayNode{
ExpressionNode: ExpressionNode{
exprType: ExprArray,
line: line,
},
items: items,
}
return GetArrayNode(items, line)
}
// NewHashNode creates a new hash node
func NewHashNode(items map[Node]Node, line int) *HashNode {
return &HashNode{
ExpressionNode: ExpressionNode{
exprType: ExprHash,
line: line,
},
items: items,
}
return GetHashNode(items, line)
}
// NewFunctionNode creates a new function call node
func NewFunctionNode(name string, args []Node, line int) *FunctionNode {
return &FunctionNode{
ExpressionNode: ExpressionNode{
exprType: ExprFunction,
line: line,
},
name: name,
args: args,
}
return GetFunctionNode(name, args, line)
}

317
expr_benchmark_test.go Normal file
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@ -0,0 +1,317 @@
package twig
import (
"bytes"
"testing"
)
// Benchmark for expression evaluation
func BenchmarkExpressionEvaluation(b *testing.B) {
engine := New()
ctx := NewRenderContext(engine.environment, map[string]interface{}{
"a": 10,
"b": 20,
"c": "hello",
"d": []interface{}{1, 2, 3, 4, 5},
"e": map[string]interface{}{
"f": "world",
"g": 42,
},
}, engine)
defer ctx.Release()
// Setup expression nodes for testing
tests := []struct {
name string
node Node
}{
{
name: "LiteralNode",
node: NewLiteralNode("test string", 1),
},
{
name: "VariableNode",
node: NewVariableNode("a", 1),
},
{
name: "BinaryNode-Simple",
node: NewBinaryNode("+", NewVariableNode("a", 1), NewVariableNode("b", 1), 1),
},
{
name: "BinaryNode-Complex",
node: NewBinaryNode(
"+",
NewBinaryNode("*", NewVariableNode("a", 1), NewLiteralNode(2, 1), 1),
NewBinaryNode("/", NewVariableNode("b", 1), NewLiteralNode(4, 1), 1),
1,
),
},
{
name: "GetAttrNode",
node: NewGetAttrNode(NewVariableNode("e", 1), NewLiteralNode("f", 1), 1),
},
{
name: "GetItemNode",
node: NewGetItemNode(NewVariableNode("d", 1), NewLiteralNode(2, 1), 1),
},
{
name: "ArrayNode",
node: NewArrayNode([]Node{
NewVariableNode("a", 1),
NewVariableNode("b", 1),
NewLiteralNode("test", 1),
}, 1),
},
{
name: "HashNode",
node: func() *HashNode {
items := make(map[Node]Node)
items[NewLiteralNode("key1", 1)] = NewVariableNode("a", 1)
items[NewLiteralNode("key2", 1)] = NewVariableNode("b", 1)
items[NewLiteralNode("key3", 1)] = NewLiteralNode("value", 1)
return NewHashNode(items, 1)
}(),
},
{
name: "ConditionalNode",
node: NewConditionalNode(
NewBinaryNode(">", NewVariableNode("a", 1), NewLiteralNode(5, 1), 1),
NewVariableNode("b", 1),
NewLiteralNode(0, 1),
1,
),
},
}
// Run each benchmark
for _, tc := range tests {
b.Run(tc.name, func(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = ctx.EvaluateExpression(tc.node)
}
})
}
}
// BenchmarkExpressionRender benchmarks the rendering of expressions
func BenchmarkExpressionRender(b *testing.B) {
engine := New()
ctx := NewRenderContext(engine.environment, map[string]interface{}{
"a": 10,
"b": 20,
"c": "hello",
"d": []interface{}{1, 2, 3, 4, 5},
"e": map[string]interface{}{
"f": "world",
"g": 42,
},
}, engine)
defer ctx.Release()
// Setup expression nodes for testing
tests := []struct {
name string
node Node
}{
{
name: "LiteralNode",
node: NewLiteralNode("test string", 1),
},
{
name: "VariableNode",
node: NewVariableNode("a", 1),
},
{
name: "BinaryNode",
node: NewBinaryNode("+", NewVariableNode("a", 1), NewVariableNode("b", 1), 1),
},
{
name: "GetAttrNode",
node: NewGetAttrNode(NewVariableNode("e", 1), NewLiteralNode("f", 1), 1),
},
{
name: "GetItemNode",
node: NewGetItemNode(NewVariableNode("d", 1), NewLiteralNode(2, 1), 1),
},
}
// Create a buffer for testing
buf := bytes.NewBuffer(nil)
// Run each benchmark
for _, tc := range tests {
b.Run(tc.name, func(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
_ = tc.node.Render(buf, ctx)
}
})
}
}
// BenchmarkFilterChain benchmarks filter chain evaluation
func BenchmarkFilterChain(b *testing.B) {
engine := New()
ctx := NewRenderContext(engine.environment, map[string]interface{}{
"a": 10,
"text": "Hello, World!",
"html": "<p>This is a paragraph</p>",
}, engine)
defer ctx.Release()
// Setup filter nodes for testing
tests := []struct {
name string
node Node
}{
{
name: "SingleFilter",
node: NewFilterNode(NewVariableNode("text", 1), "upper", nil, 1),
},
{
name: "FilterChain",
node: NewFilterNode(
NewFilterNode(
NewVariableNode("text", 1),
"upper",
nil,
1,
),
"trim",
nil,
1,
),
},
{
name: "FilterWithArgs",
node: NewFilterNode(
NewVariableNode("text", 1),
"replace",
[]Node{
NewLiteralNode("World", 1),
NewLiteralNode("Universe", 1),
},
1,
),
},
}
// Run each benchmark
for _, tc := range tests {
b.Run(tc.name, func(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = ctx.EvaluateExpression(tc.node)
}
})
}
}
// BenchmarkFunctionCall benchmarks function calls
func BenchmarkFunctionCall(b *testing.B) {
engine := New()
ctx := NewRenderContext(engine.environment, map[string]interface{}{
"numbers": []interface{}{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
"start": 1,
"end": 10,
}, engine)
defer ctx.Release()
// Setup function nodes for testing
tests := []struct {
name string
node Node
}{
{
name: "RangeFunction",
node: NewFunctionNode("range", []Node{
NewVariableNode("start", 1),
NewVariableNode("end", 1),
}, 1),
},
{
name: "LengthFunction",
node: NewFunctionNode("length", []Node{
NewVariableNode("numbers", 1),
}, 1),
},
{
name: "MaxFunction",
node: NewFunctionNode("max", []Node{
NewVariableNode("numbers", 1),
}, 1),
},
}
// Run each benchmark
for _, tc := range tests {
b.Run(tc.name, func(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = ctx.EvaluateExpression(tc.node)
}
})
}
}
// BenchmarkArgSlicePooling specifically tests array arguments allocation
func BenchmarkArgSlicePooling(b *testing.B) {
engine := New()
ctx := NewRenderContext(engine.environment, nil, engine)
defer ctx.Release()
smallArgs := []Node{
NewLiteralNode(1, 1),
NewLiteralNode(2, 1),
}
mediumArgs := []Node{
NewLiteralNode(1, 1),
NewLiteralNode(2, 1),
NewLiteralNode(3, 1),
NewLiteralNode(4, 1),
NewLiteralNode(5, 1),
}
largeArgs := make([]Node, 10)
for i := 0; i < 10; i++ {
largeArgs[i] = NewLiteralNode(i, 1)
}
tests := []struct {
name string
node Node
}{
{
name: "NoArgs",
node: NewFunctionNode("range", nil, 1),
},
{
name: "SmallArgs",
node: NewFunctionNode("range", smallArgs, 1),
},
{
name: "MediumArgs",
node: NewFunctionNode("range", mediumArgs, 1),
},
{
name: "LargeArgs",
node: NewFunctionNode("range", largeArgs, 1),
},
}
for _, tc := range tests {
b.Run(tc.name, func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
_, _ = ctx.EvaluateExpression(tc.node)
}
})
}
}

475
expr_pool.go Normal file
View file

@ -0,0 +1,475 @@
package twig
import (
"sync"
)
// This file implements object pooling for expression node types
// to reduce memory allocations during evaluation.
// BinaryNodePool provides a pool for BinaryNode objects
var BinaryNodePool = sync.Pool{
New: func() interface{} {
return &BinaryNode{}
},
}
// GetBinaryNode gets a BinaryNode from the pool and initializes it
func GetBinaryNode(operator string, left, right Node, line int) *BinaryNode {
node := BinaryNodePool.Get().(*BinaryNode)
node.ExpressionNode.exprType = ExprBinary
node.ExpressionNode.line = line
node.operator = operator
node.left = left
node.right = right
return node
}
// ReleaseBinaryNode returns a BinaryNode to the pool
func ReleaseBinaryNode(node *BinaryNode) {
if node == nil {
return
}
node.operator = ""
node.left = nil
node.right = nil
BinaryNodePool.Put(node)
}
// GetAttrNodePool provides a pool for GetAttrNode objects
var GetAttrNodePool = sync.Pool{
New: func() interface{} {
return &GetAttrNode{}
},
}
// GetGetAttrNode gets a GetAttrNode from the pool and initializes it
func GetGetAttrNode(node, attribute Node, line int) *GetAttrNode {
n := GetAttrNodePool.Get().(*GetAttrNode)
n.ExpressionNode.exprType = ExprGetAttr
n.ExpressionNode.line = line
n.node = node
n.attribute = attribute
return n
}
// ReleaseGetAttrNode returns a GetAttrNode to the pool
func ReleaseGetAttrNode(node *GetAttrNode) {
if node == nil {
return
}
node.node = nil
node.attribute = nil
GetAttrNodePool.Put(node)
}
// GetItemNodePool provides a pool for GetItemNode objects
var GetItemNodePool = sync.Pool{
New: func() interface{} {
return &GetItemNode{}
},
}
// GetGetItemNode gets a GetItemNode from the pool and initializes it
func GetGetItemNode(node, item Node, line int) *GetItemNode {
n := GetItemNodePool.Get().(*GetItemNode)
n.ExpressionNode.exprType = ExprGetItem
n.ExpressionNode.line = line
n.node = node
n.item = item
return n
}
// ReleaseGetItemNode returns a GetItemNode to the pool
func ReleaseGetItemNode(node *GetItemNode) {
if node == nil {
return
}
node.node = nil
node.item = nil
GetItemNodePool.Put(node)
}
// FilterNodePool provides a pool for FilterNode objects
var FilterNodePool = sync.Pool{
New: func() interface{} {
return &FilterNode{}
},
}
// GetFilterNode gets a FilterNode from the pool and initializes it
func GetFilterNode(node Node, filter string, args []Node, line int) *FilterNode {
n := FilterNodePool.Get().(*FilterNode)
n.ExpressionNode.exprType = ExprFilter
n.ExpressionNode.line = line
n.node = node
n.filter = filter
n.args = args
return n
}
// ReleaseFilterNode returns a FilterNode to the pool
func ReleaseFilterNode(node *FilterNode) {
if node == nil {
return
}
node.node = nil
node.filter = ""
node.args = nil
FilterNodePool.Put(node)
}
// TestNodePool provides a pool for TestNode objects
var TestNodePool = sync.Pool{
New: func() interface{} {
return &TestNode{}
},
}
// GetTestNode gets a TestNode from the pool and initializes it
func GetTestNode(node Node, test string, args []Node, line int) *TestNode {
n := TestNodePool.Get().(*TestNode)
n.ExpressionNode.exprType = ExprTest
n.ExpressionNode.line = line
n.node = node
n.test = test
n.args = args
return n
}
// ReleaseTestNode returns a TestNode to the pool
func ReleaseTestNode(node *TestNode) {
if node == nil {
return
}
node.node = nil
node.test = ""
node.args = nil
TestNodePool.Put(node)
}
// UnaryNodePool provides a pool for UnaryNode objects
var UnaryNodePool = sync.Pool{
New: func() interface{} {
return &UnaryNode{}
},
}
// GetUnaryNode gets a UnaryNode from the pool and initializes it
func GetUnaryNode(operator string, node Node, line int) *UnaryNode {
n := UnaryNodePool.Get().(*UnaryNode)
n.ExpressionNode.exprType = ExprUnary
n.ExpressionNode.line = line
n.operator = operator
n.node = node
return n
}
// ReleaseUnaryNode returns a UnaryNode to the pool
func ReleaseUnaryNode(node *UnaryNode) {
if node == nil {
return
}
node.operator = ""
node.node = nil
UnaryNodePool.Put(node)
}
// ConditionalNodePool provides a pool for ConditionalNode objects
var ConditionalNodePool = sync.Pool{
New: func() interface{} {
return &ConditionalNode{}
},
}
// GetConditionalNode gets a ConditionalNode from the pool and initializes it
func GetConditionalNode(condition, trueExpr, falseExpr Node, line int) *ConditionalNode {
node := ConditionalNodePool.Get().(*ConditionalNode)
node.ExpressionNode.exprType = ExprConditional
node.ExpressionNode.line = line
node.condition = condition
node.trueExpr = trueExpr
node.falseExpr = falseExpr
return node
}
// ReleaseConditionalNode returns a ConditionalNode to the pool
func ReleaseConditionalNode(node *ConditionalNode) {
if node == nil {
return
}
node.condition = nil
node.trueExpr = nil
node.falseExpr = nil
ConditionalNodePool.Put(node)
}
// ArrayNodePool provides a pool for ArrayNode objects
var ArrayNodePool = sync.Pool{
New: func() interface{} {
return &ArrayNode{}
},
}
// GetArrayNode gets an ArrayNode from the pool and initializes it
func GetArrayNode(items []Node, line int) *ArrayNode {
node := ArrayNodePool.Get().(*ArrayNode)
node.ExpressionNode.exprType = ExprArray
node.ExpressionNode.line = line
node.items = items
return node
}
// ReleaseArrayNode returns an ArrayNode to the pool
func ReleaseArrayNode(node *ArrayNode) {
if node == nil {
return
}
node.items = nil
ArrayNodePool.Put(node)
}
// HashNodePool provides a pool for HashNode objects
var HashNodePool = sync.Pool{
New: func() interface{} {
return &HashNode{}
},
}
// GetHashNode gets a HashNode from the pool and initializes it
func GetHashNode(items map[Node]Node, line int) *HashNode {
node := HashNodePool.Get().(*HashNode)
node.ExpressionNode.exprType = ExprHash
node.ExpressionNode.line = line
node.items = items
return node
}
// ReleaseHashNode returns a HashNode to the pool
func ReleaseHashNode(node *HashNode) {
if node == nil {
return
}
node.items = nil
HashNodePool.Put(node)
}
// FunctionNodePool provides a pool for FunctionNode objects
var FunctionNodePool = sync.Pool{
New: func() interface{} {
return &FunctionNode{}
},
}
// GetFunctionNode gets a FunctionNode from the pool and initializes it
func GetFunctionNode(name string, args []Node, line int) *FunctionNode {
node := FunctionNodePool.Get().(*FunctionNode)
node.ExpressionNode.exprType = ExprFunction
node.ExpressionNode.line = line
node.name = name
node.args = args
return node
}
// ReleaseFunctionNode returns a FunctionNode to the pool
func ReleaseFunctionNode(node *FunctionNode) {
if node == nil {
return
}
node.name = ""
node.args = nil
node.moduleExpr = nil
FunctionNodePool.Put(node)
}
// VariableNodePool provides a pool for VariableNode objects
var VariableNodePool = sync.Pool{
New: func() interface{} {
return &VariableNode{}
},
}
// GetVariableNode gets a VariableNode from the pool and initializes it
func GetVariableNode(name string, line int) *VariableNode {
node := VariableNodePool.Get().(*VariableNode)
node.ExpressionNode.exprType = ExprVariable
node.ExpressionNode.line = line
node.name = name
return node
}
// ReleaseVariableNode returns a VariableNode to the pool
func ReleaseVariableNode(node *VariableNode) {
if node == nil {
return
}
node.name = ""
VariableNodePool.Put(node)
}
// LiteralNodePool provides a pool for LiteralNode objects
var LiteralNodePool = sync.Pool{
New: func() interface{} {
return &LiteralNode{}
},
}
// GetLiteralNode gets a LiteralNode from the pool and initializes it
func GetLiteralNode(value interface{}, line int) *LiteralNode {
node := LiteralNodePool.Get().(*LiteralNode)
node.ExpressionNode.exprType = ExprLiteral
node.ExpressionNode.line = line
node.value = value
return node
}
// ReleaseLiteralNode returns a LiteralNode to the pool
func ReleaseLiteralNode(node *LiteralNode) {
if node == nil {
return
}
node.value = nil
LiteralNodePool.Put(node)
}
// --- Slice Pools for Expression Evaluation ---
// smallArgSlicePool provides a pool for small argument slices (0-2 items)
var smallArgSlicePool = sync.Pool{
New: func() interface{} {
// Pre-allocate a slice with capacity 2
return make([]interface{}, 0, 2)
},
}
// mediumArgSlicePool provides a pool for medium argument slices (3-5 items)
var mediumArgSlicePool = sync.Pool{
New: func() interface{} {
// Pre-allocate a slice with capacity 5
return make([]interface{}, 0, 5)
},
}
// largeArgSlicePool provides a pool for large argument slices (6-10 items)
var largeArgSlicePool = sync.Pool{
New: func() interface{} {
// Pre-allocate a slice with capacity 10
return make([]interface{}, 0, 10)
},
}
// GetArgSlice gets an appropriately sized slice for the given number of arguments
func GetArgSlice(size int) []interface{} {
if size <= 0 {
return nil
}
var slice []interface{}
switch {
case size <= 2:
slice = smallArgSlicePool.Get().([]interface{})
case size <= 5:
slice = mediumArgSlicePool.Get().([]interface{})
case size <= 10:
slice = largeArgSlicePool.Get().([]interface{})
default:
// For very large slices, just allocate directly
return make([]interface{}, 0, size)
}
// Clear the slice but maintain capacity
return slice[:0]
}
// ReleaseArgSlice returns an argument slice to the appropriate pool
func ReleaseArgSlice(slice []interface{}) {
if slice == nil {
return
}
// Clear all references
for i := range slice {
slice[i] = nil
}
// Reset length to 0
slice = slice[:0]
// Return to appropriate pool based on capacity
switch cap(slice) {
case 2:
smallArgSlicePool.Put(slice)
case 5:
mediumArgSlicePool.Put(slice)
case 10:
largeArgSlicePool.Put(slice)
}
}
// --- Map Pools for HashNode Evaluation ---
// smallHashMapPool provides a pool for small hash maps (1-5 items)
var smallHashMapPool = sync.Pool{
New: func() interface{} {
return make(map[string]interface{}, 5)
},
}
// mediumHashMapPool provides a pool for medium hash maps (6-15 items)
var mediumHashMapPool = sync.Pool{
New: func() interface{} {
return make(map[string]interface{}, 15)
},
}
// GetHashMap gets an appropriately sized map for hash operations
func GetHashMap(size int) map[string]interface{} {
if size <= 5 {
hashMap := smallHashMapPool.Get().(map[string]interface{})
// Clear any existing entries
for k := range hashMap {
delete(hashMap, k)
}
return hashMap
} else if size <= 15 {
hashMap := mediumHashMapPool.Get().(map[string]interface{})
// Clear any existing entries
for k := range hashMap {
delete(hashMap, k)
}
return hashMap
}
// For larger maps, just allocate directly
return make(map[string]interface{}, size)
}
// ReleaseHashMap returns a hash map to the appropriate pool
func ReleaseHashMap(hashMap map[string]interface{}) {
if hashMap == nil {
return
}
// Clear all entries (not used directly in our defer block)
// for k := range hashMap {
// delete(hashMap, k)
// }
// Return to appropriate pool based on capacity
// We don't actually clear the map when releasing through the defer,
// because we return the map as the result and deleting entries would
// clear the returned result
// Map doesn't have a built-in cap function
// Not using pool return for maps directly returned as results
/*
switch {
case len(hashMap) <= 5:
smallHashMapPool.Put(hashMap)
case len(hashMap) <= 15:
mediumHashMapPool.Put(hashMap)
}
*/
}

8
html_preserving_tokenizer.go
View file

@ -82,7 +82,7 @@ func (p *Parser) htmlPreservingTokenize() ([]Token, error) {
if nextTagPos-1 > currentPosition {
preText := p.source[currentPosition : nextTagPos-1]
tokens = append(tokens, createToken(TOKEN_TEXT, preText, line))
line += strings.Count(preText, "\n")
line += countNewlines(preText)
}
// Add the tag itself as literal text (without the backslash)
@ -97,7 +97,7 @@ func (p *Parser) htmlPreservingTokenize() ([]Token, error) {
// No more tags found, add the rest as TEXT
content := p.source[currentPosition:]
if len(content) > 0 {
line += strings.Count(content, "\n")
line += countNewlines(content)
tokens = append(tokens, createToken(TOKEN_TEXT, content, line))
}
break
@ -106,7 +106,7 @@ func (p *Parser) htmlPreservingTokenize() ([]Token, error) {
// Add the text before the tag (HTML content)
if nextTagPos > currentPosition {
content := p.source[currentPosition:nextTagPos]
line += strings.Count(content, "\n")
line += countNewlines(content)
tokens = append(tokens, createToken(TOKEN_TEXT, content, line))
}
@ -176,7 +176,7 @@ func (p *Parser) htmlPreservingTokenize() ([]Token, error) {
// Get the content between the tags
tagContent := p.source[currentPosition : currentPosition+endPos]
line += strings.Count(tagContent, "\n") // Update line count
line += countNewlines(tagContent) // Update line count
// Process the content between the tags based on tag type
if tagType == TOKEN_COMMENT_START {

735
html_preserving_tokenizer_optimization.go Normal file
View file

@ -0,0 +1,735 @@
package twig
import (
"fmt"
"strings"
)
// optimizedHtmlPreservingTokenize is an optimized version of htmlPreservingTokenize
// that reduces memory allocations by reusing token objects and slices
func (p *Parser) optimizedHtmlPreservingTokenize() ([]Token, error) {
// Pre-allocate tokens with estimated capacity based on source length
estimatedTokenCount := len(p.source) / 20 // Rough estimate: one token per 20 chars
tokenSlice := GetPooledTokenSlice(estimatedTokenCount)
// Ensure the token slice is released even if an error occurs
defer tokenSlice.Release()
var currentPosition int
line := 1
for currentPosition < len(p.source) {
// Find the next twig tag start
nextTagPos := -1
tagType := -1
var matchedPos struct {
pos int
pattern string
ttype int
length int
}
// Use a single substring for all pattern searches to reduce allocations
remainingSource := p.source[currentPosition:]
// Check for all possible tag starts, including whitespace control variants
positions := []struct {
pos int
pattern string
ttype int
length int
}{
{strings.Index(remainingSource, "{{-"), "{{-", TOKEN_VAR_START_TRIM, 3},
{strings.Index(remainingSource, "{{"), "{{", TOKEN_VAR_START, 2},
{strings.Index(remainingSource, "{%-"), "{%-", TOKEN_BLOCK_START_TRIM, 3},
{strings.Index(remainingSource, "{%"), "{%", TOKEN_BLOCK_START, 2},
{strings.Index(remainingSource, "{#"), "{#", TOKEN_COMMENT_START, 2},
}
// Find the closest tag
for _, pos := range positions {
if pos.pos != -1 {
adjustedPos := currentPosition + pos.pos
if nextTagPos == -1 || adjustedPos < nextTagPos {
nextTagPos = adjustedPos
tagType = pos.ttype
matchedPos = pos
}
}
}
// Check if the tag is escaped with a backslash
if nextTagPos != -1 && nextTagPos > 0 && p.source[nextTagPos-1] == '\\' {
// This tag is escaped with a backslash, treat it as literal text
// Add text up to the backslash (if any)
if nextTagPos-1 > currentPosition {
preText := p.source[currentPosition : nextTagPos-1]
tokenSlice.AppendToken(TOKEN_TEXT, preText, line)
line += countNewlines(preText)
}
// Add the tag itself as literal text (without the backslash)
tokenSlice.AppendToken(TOKEN_TEXT, matchedPos.pattern, line)
// Move past the tag
currentPosition = nextTagPos + matchedPos.length
continue
}
if nextTagPos == -1 {
// No more tags found, add the rest as TEXT
content := p.source[currentPosition:]
if len(content) > 0 {
line += countNewlines(content)
tokenSlice.AppendToken(TOKEN_TEXT, content, line)
}
break
}
// Add the text before the tag (HTML content)
if nextTagPos > currentPosition {
content := p.source[currentPosition:nextTagPos]
line += countNewlines(content)
tokenSlice.AppendToken(TOKEN_TEXT, content, line)
}
// Add the tag start token
tokenSlice.AppendToken(tagType, "", line)
// Determine tag length and move past the opening
tagLength := 2 // Default for "{{", "{%", "{#"
if tagType == TOKEN_VAR_START_TRIM || tagType == TOKEN_BLOCK_START_TRIM {
tagLength = 3 // For "{{-" or "{%-"
}
currentPosition = nextTagPos + tagLength
// Find the matching end tag
var endTag string
var endTagType int
var endTagLength int
if tagType == TOKEN_VAR_START || tagType == TOKEN_VAR_START_TRIM {
// For variable tags, look for "}}" or "-}}"
endPos1 := strings.Index(p.source[currentPosition:], "}}")
endPos2 := strings.Index(p.source[currentPosition:], "-}}")
if endPos1 != -1 && (endPos2 == -1 || endPos1 < endPos2) {
endTag = "}}"
endTagType = TOKEN_VAR_END
endTagLength = 2
} else if endPos2 != -1 {
endTag = "-}}"
endTagType = TOKEN_VAR_END_TRIM
endTagLength = 3
} else {
return nil, fmt.Errorf("unclosed variable tag starting at line %d", line)
}
} else if tagType == TOKEN_BLOCK_START || tagType == TOKEN_BLOCK_START_TRIM {
// For block tags, look for "%}" or "-%}"
endPos1 := strings.Index(p.source[currentPosition:], "%}")
endPos2 := strings.Index(p.source[currentPosition:], "-%}")
if endPos1 != -1 && (endPos2 == -1 || endPos1 < endPos2) {
endTag = "%}"
endTagType = TOKEN_BLOCK_END
endTagLength = 2
} else if endPos2 != -1 {
endTag = "-%}"
endTagType = TOKEN_BLOCK_END_TRIM
endTagLength = 3
} else {
return nil, fmt.Errorf("unclosed block tag starting at line %d", line)
}
} else if tagType == TOKEN_COMMENT_START {
// For comment tags, look for "#}"
endPos := strings.Index(p.source[currentPosition:], "#}")
if endPos == -1 {
return nil, fmt.Errorf("unclosed comment starting at line %d", line)
}
endTag = "#}"
endTagType = TOKEN_COMMENT_END
endTagLength = 2
}
// Find the position of the end tag
endPos := strings.Index(p.source[currentPosition:], endTag)
if endPos == -1 {
return nil, fmt.Errorf("unclosed tag starting at line %d", line)
}
// Get the content between the tags
tagContent := p.source[currentPosition : currentPosition+endPos]
line += countNewlines(tagContent) // Update line count
// Process the content between the tags based on tag type
if tagType == TOKEN_COMMENT_START {
// For comments, just store the content as a TEXT token
if len(tagContent) > 0 {
tokenSlice.AppendToken(TOKEN_TEXT, tagContent, line)
}
} else {
// For variable and block tags, tokenize the content properly
// Trim whitespace from the tag content
tagContent = strings.TrimSpace(tagContent)
if tagType == TOKEN_BLOCK_START || tagType == TOKEN_BLOCK_START_TRIM {
// Process block tags like if, for, etc.
// First, extract the tag name
parts := strings.SplitN(tagContent, " ", 2)
if len(parts) > 0 {
blockName := parts[0]
tokenSlice.AppendToken(TOKEN_NAME, blockName, line)
// Different handling based on block type
if blockName == "if" || blockName == "elseif" {
// For if/elseif blocks, tokenize the condition
if len(parts) > 1 {
condition := strings.TrimSpace(parts[1])
// Tokenize the condition properly
p.optimizedTokenizeExpression(condition, tokenSlice, line)
}
} else if blockName == "for" {
// For for loops, tokenize iterator variables and collection
if len(parts) > 1 {
forExpr := strings.TrimSpace(parts[1])
// Check for proper "in" keyword
inPos := strings.Index(strings.ToLower(forExpr), " in ")
if inPos != -1 {
// Extract iterators and collection
iterators := strings.TrimSpace(forExpr[:inPos])
collection := strings.TrimSpace(forExpr[inPos+4:])
// Handle key, value iterators (e.g., "key, value in collection")
if strings.Contains(iterators, ",") {
iterParts := strings.SplitN(iterators, ",", 2)
if len(iterParts) == 2 {
keyVar := strings.TrimSpace(iterParts[0])
valueVar := strings.TrimSpace(iterParts[1])
// Add tokens for key and value variables
tokenSlice.AppendToken(TOKEN_NAME, keyVar, line)
tokenSlice.AppendToken(TOKEN_PUNCTUATION, ",", line)
tokenSlice.AppendToken(TOKEN_NAME, valueVar, line)
}
} else {
// Single iterator variable
tokenSlice.AppendToken(TOKEN_NAME, iterators, line)
}
// Add "in" keyword
tokenSlice.AppendToken(TOKEN_NAME, "in", line)
// Check if collection is a function call (contains ( and ))
if strings.Contains(collection, "(") && strings.Contains(collection, ")") {
// Tokenize the collection as a complex expression
p.optimizedTokenizeExpression(collection, tokenSlice, line)
} else {
// Add collection as a simple variable
tokenSlice.AppendToken(TOKEN_NAME, collection, line)
}
} else {
// Fallback if "in" keyword not found
tokenSlice.AppendToken(TOKEN_NAME, forExpr, line)
}
}
} else if blockName == "do" {
// Special handling for do tag with assignments and expressions
if len(parts) > 1 {
doExpr := strings.TrimSpace(parts[1])
// Check if it's an assignment (contains =)
assignPos := strings.Index(doExpr, "=")
if assignPos > 0 && !strings.Contains(doExpr[:assignPos], "==") {
// It's an assignment
varName := strings.TrimSpace(doExpr[:assignPos])
valueExpr := strings.TrimSpace(doExpr[assignPos+1:])
// Add the variable name
tokenSlice.AppendToken(TOKEN_NAME, varName, line)
// Add the equals sign
tokenSlice.AppendToken(TOKEN_OPERATOR, "=", line)
// Tokenize the expression on the right side
p.optimizedTokenizeExpression(valueExpr, tokenSlice, line)
} else {
// It's just an expression, tokenize it
p.optimizedTokenizeExpression(doExpr, tokenSlice, line)
}
}
} else if blockName == "include" {
// Special handling for include tag with quoted template names
if len(parts) > 1 {
includeExpr := strings.TrimSpace(parts[1])
// First check if we have a 'with' keyword which separates template name from params
withPos := strings.Index(strings.ToLower(includeExpr), " with ")
if withPos > 0 {
// Split the include expression into template name and parameters
templatePart := strings.TrimSpace(includeExpr[:withPos])
paramsPart := strings.TrimSpace(includeExpr[withPos+6:]) // +6 to skip " with "
// Handle quoted template names
if (strings.HasPrefix(templatePart, "\"") && strings.HasSuffix(templatePart, "\"")) ||
(strings.HasPrefix(templatePart, "'") && strings.HasSuffix(templatePart, "'")) {
// Extract the template name without quotes
templateName := templatePart[1 : len(templatePart)-1]
// Add as a string token
tokenSlice.AppendToken(TOKEN_STRING, templateName, line)
} else {
// Unquoted name, add as name token
tokenSlice.AppendToken(TOKEN_NAME, templatePart, line)
}
// Add "with" keyword
tokenSlice.AppendToken(TOKEN_NAME, "with", line)
// Add opening brace for the parameters
tokenSlice.AppendToken(TOKEN_PUNCTUATION, "{", line)
// For parameters that might include nested objects, we need a different approach
// Tokenize the parameter string, preserving nested structures
optimizedTokenizeComplexObject(paramsPart, tokenSlice, line)
// Add closing brace
tokenSlice.AppendToken(TOKEN_PUNCTUATION, "}", line)
} else {
// No 'with' keyword, just a template name
if (strings.HasPrefix(includeExpr, "\"") && strings.HasSuffix(includeExpr, "\"")) ||
(strings.HasPrefix(includeExpr, "'") && strings.HasSuffix(includeExpr, "'")) {
// Extract template name without quotes
templateName := includeExpr[1 : len(includeExpr)-1]
// Add as a string token
tokenSlice.AppendToken(TOKEN_STRING, templateName, line)
} else {
// Not quoted, add as name token
tokenSlice.AppendToken(TOKEN_NAME, includeExpr, line)
}
}
}
} else if blockName == "extends" {
// Special handling for extends tag with quoted template names
if len(parts) > 1 {
extendsExpr := strings.TrimSpace(parts[1])
// Handle quoted template names
if (strings.HasPrefix(extendsExpr, "\"") && strings.HasSuffix(extendsExpr, "\"")) ||
(strings.HasPrefix(extendsExpr, "'") && strings.HasSuffix(extendsExpr, "'")) {
// Extract the template name without quotes
templateName := extendsExpr[1 : len(extendsExpr)-1]
// Add as a string token
tokenSlice.AppendToken(TOKEN_STRING, templateName, line)
} else {
// Not quoted, tokenize as a normal expression
p.optimizedTokenizeExpression(extendsExpr, tokenSlice, line)
}
}
} else if blockName == "set" {
// Special handling for set tag to properly tokenize variable assignments
if len(parts) > 1 {
setExpr := strings.TrimSpace(parts[1])
// Check for the assignment operator
assignPos := strings.Index(setExpr, "=")
if assignPos != -1 {
// Split into variable name and value
varName := strings.TrimSpace(setExpr[:assignPos])
value := strings.TrimSpace(setExpr[assignPos+1:])
// Add the variable name token
tokenSlice.AppendToken(TOKEN_NAME, varName, line)
// Add the assignment operator
tokenSlice.AppendToken(TOKEN_OPERATOR, "=", line)
// Tokenize the value expression
p.optimizedTokenizeExpression(value, tokenSlice, line)
} else {
// Handle case without assignment (e.g., {% set var %})
tokenSlice.AppendToken(TOKEN_NAME, setExpr, line)
}
}
} else {
// For other block types, just add parameters as NAME tokens
if len(parts) > 1 {
tokenSlice.AppendToken(TOKEN_NAME, parts[1], line)
}
}
}
} else {
// For variable tags, tokenize the expression
if len(tagContent) > 0 {
// If it's a simple variable name, add it directly
if !strings.ContainsAny(tagContent, ".|[](){}\"',+-*/=!<>%&^~") {
tokenSlice.AppendToken(TOKEN_NAME, tagContent, line)
} else {
// For complex expressions, tokenize properly
p.optimizedTokenizeExpression(tagContent, tokenSlice, line)
}
}
}
}
// Add the end tag token
tokenSlice.AppendToken(endTagType, "", line)
// Move past the end tag
currentPosition = currentPosition + endPos + endTagLength
}
// Add EOF token
tokenSlice.AppendToken(TOKEN_EOF, "", line)
// Finalize and return the token slice
return tokenSlice.Finalize(), nil
}
// optimizedTokenizeExpression handles tokenizing expressions inside Twig tags with reduced allocations
func (p *Parser) optimizedTokenizeExpression(expr string, tokens *PooledTokenSlice, line int) {
var inString bool
var stringDelimiter byte
var stringStart int // Position where string content starts
for i := 0; i < len(expr); i++ {
c := expr[i]
// Handle string literals with quotes
if (c == '"' || c == '\'') && (i == 0 || expr[i-1] != '\\') {
if inString && c == stringDelimiter {
// End of string
inString = false
// Add the string token
tokens.AppendToken(TOKEN_STRING, expr[stringStart:i], line)
} else if !inString {
// Start of string
inString = true
stringDelimiter = c
// Remember the start position (for string content)
stringStart = i + 1
} else {
// Quote inside a string with different delimiter
// Skip
}
continue
}
// If we're inside a string, just skip this character
if inString {
continue
}
// Handle operators (including two-character operators)
if isOperator(c) {
// Check for two-character operators
if i+1 < len(expr) {
nextChar := expr[i+1]
// Direct comparison for common two-char operators
if (c == '=' && nextChar == '=') ||
(c == '!' && nextChar == '=') ||
(c == '>' && nextChar == '=') ||
(c == '<' && nextChar == '=') ||
(c == '&' && nextChar == '&') ||
(c == '|' && nextChar == '|') ||
(c == '?' && nextChar == '?') {
// Add the two-character operator token
tokens.AppendToken(TOKEN_OPERATOR, string([]byte{c, nextChar}), line)
i++ // Skip the next character
continue
}
}
// Add single-character operator
tokens.AppendToken(TOKEN_OPERATOR, string([]byte{c}), line)
continue
}
// Handle punctuation
if isPunctuation(c) {
tokens.AppendToken(TOKEN_PUNCTUATION, string([]byte{c}), line)
continue
}
// Handle whitespace - skip it
if isWhitespace(c) {
continue
}
// Handle identifiers and keywords
if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' {
// Start of an identifier
start := i
// Find the end of the identifier
for i++; i < len(expr) && ((expr[i] >= 'a' && expr[i] <= 'z') ||
(expr[i] >= 'A' && expr[i] <= 'Z') ||
(expr[i] >= '0' && expr[i] <= '9') ||
expr[i] == '_'); i++ {
}
// Extract the identifier
identifier := expr[start:i]
i-- // Adjust for the loop increment
// Add the token based on the identifier
if identifier == "true" || identifier == "false" || identifier == "null" {
tokens.AppendToken(TOKEN_NAME, identifier, line)
} else {
tokens.AppendToken(TOKEN_NAME, identifier, line)
}
continue
}
// Handle numbers
if isDigit(c) || (c == '-' && i+1 < len(expr) && isDigit(expr[i+1])) {
start := i
// Skip the negative sign if present
if c == '-' {
i++
}
// Find the end of the number
for i++; i < len(expr) && isDigit(expr[i]); i++ {
}
// Check for decimal point
if i < len(expr) && expr[i] == '.' {
i++
// Find the end of the decimal part
for ; i < len(expr) && isDigit(expr[i]); i++ {
}
}
// Extract the number
number := expr[start:i]
i-- // Adjust for the loop increment
// Add the number token
tokens.AppendToken(TOKEN_NUMBER, number, line)
continue
}
}
}
// optimizedTokenizeComplexObject parses and tokenizes a complex object with reduced allocations
func optimizedTokenizeComplexObject(objStr string, tokens *PooledTokenSlice, line int) {
// First strip outer braces if present
objStr = strings.TrimSpace(objStr)
if strings.HasPrefix(objStr, "{") && strings.HasSuffix(objStr, "}") {
objStr = strings.TrimSpace(objStr[1 : len(objStr)-1])
}
// Tokenize the object contents
optimizedTokenizeObjectContents(objStr, tokens, line)
}
// optimizedTokenizeObjectContents parses key-value pairs with reduced allocations
func optimizedTokenizeObjectContents(content string, tokens *PooledTokenSlice, line int) {
// State tracking
inSingleQuote := false
inDoubleQuote := false
inObject := 0 // Nesting level for objects
inArray := 0 // Nesting level for arrays
start := 0
colonPos := -1
for i := 0; i <= len(content); i++ {
// At the end of the string or at a comma at the top level
atEnd := i == len(content)
isComma := !atEnd && content[i] == ','
if (isComma || atEnd) && inObject == 0 && inArray == 0 && !inSingleQuote && !inDoubleQuote {
// We've found the end of a key-value pair
if colonPos != -1 {
// Extract the key and value
keyStr := strings.TrimSpace(content[start:colonPos])
valueStr := strings.TrimSpace(content[colonPos+1 : i])
// Process the key
if (len(keyStr) >= 2 && keyStr[0] == '\'' && keyStr[len(keyStr)-1] == '\'') ||
(len(keyStr) >= 2 && keyStr[0] == '"' && keyStr[len(keyStr)-1] == '"') {
// Quoted key - add as a string token
tokens.AppendToken(TOKEN_STRING, keyStr[1:len(keyStr)-1], line)
} else {
// Unquoted key
tokens.AppendToken(TOKEN_NAME, keyStr, line)
}
// Add colon separator
tokens.AppendToken(TOKEN_PUNCTUATION, ":", line)
// Process the value based on type
if len(valueStr) >= 2 && valueStr[0] == '{' && valueStr[len(valueStr)-1] == '}' {
// Nested object
tokens.AppendToken(TOKEN_PUNCTUATION, "{", line)
optimizedTokenizeObjectContents(valueStr[1:len(valueStr)-1], tokens, line)
tokens.AppendToken(TOKEN_PUNCTUATION, "}", line)
} else if len(valueStr) >= 2 && valueStr[0] == '[' && valueStr[len(valueStr)-1] == ']' {
// Array
tokens.AppendToken(TOKEN_PUNCTUATION, "[", line)
optimizedTokenizeArrayElements(valueStr[1:len(valueStr)-1], tokens, line)
tokens.AppendToken(TOKEN_PUNCTUATION, "]", line)
} else if (len(valueStr) >= 2 && valueStr[0] == '\'' && valueStr[len(valueStr)-1] == '\'') ||
(len(valueStr) >= 2 && valueStr[0] == '"' && valueStr[len(valueStr)-1] == '"') {
// String literal
tokens.AppendToken(TOKEN_STRING, valueStr[1:len(valueStr)-1], line)
} else if isNumericValue(valueStr) {
// Numeric value
tokens.AppendToken(TOKEN_NUMBER, valueStr, line)
} else if valueStr == "true" || valueStr == "false" {
// Boolean literal
tokens.AppendToken(TOKEN_NAME, valueStr, line)
} else if valueStr == "null" || valueStr == "nil" {
// Null/nil literal
tokens.AppendToken(TOKEN_NAME, valueStr, line)
} else {
// Variable or other value
tokens.AppendToken(TOKEN_NAME, valueStr, line)
}
// Add comma if needed
if isComma && i < len(content)-1 {
tokens.AppendToken(TOKEN_PUNCTUATION, ",", line)
}
// Reset state for next key-value pair
start = i + 1
colonPos = -1
}
continue
}
// Handle quotes and nested structures
if i < len(content) {
c := content[i]
// Handle quote characters
if c == '\'' && (i == 0 || content[i-1] != '\\') {
inSingleQuote = !inSingleQuote
} else if c == '"' && (i == 0 || content[i-1] != '\\') {
inDoubleQuote = !inDoubleQuote
}
// Skip everything inside quotes
if inSingleQuote || inDoubleQuote {
continue
}
// Handle object and array nesting
if c == '{' {
inObject++
} else if c == '}' {
inObject--
} else if c == '[' {
inArray++
} else if c == ']' {
inArray--
}
// Find the colon separator if we're not in a nested structure
if c == ':' && inObject == 0 && inArray == 0 && colonPos == -1 {
colonPos = i
}
}
}
}
// optimizedTokenizeArrayElements parses and tokenizes array elements with reduced allocations
func optimizedTokenizeArrayElements(arrStr string, tokens *PooledTokenSlice, line int) {
// State tracking
inSingleQuote := false
inDoubleQuote := false
inObject := 0
inArray := 0
// Track the start position of each element
elemStart := 0
for i := 0; i <= len(arrStr); i++ {
// At the end of the string or at a comma at the top level
atEnd := i == len(arrStr)
isComma := !atEnd && arrStr[i] == ','
// Process element when we reach a comma or the end
if (isComma || atEnd) && inObject == 0 && inArray == 0 && !inSingleQuote && !inDoubleQuote {
// Extract the element
if i > elemStart {
element := strings.TrimSpace(arrStr[elemStart:i])
// Process the element based on its type
if len(element) >= 2 {
if element[0] == '{' && element[len(element)-1] == '}' {
// Nested object
tokens.AppendToken(TOKEN_PUNCTUATION, "{", line)
optimizedTokenizeObjectContents(element[1:len(element)-1], tokens, line)
tokens.AppendToken(TOKEN_PUNCTUATION, "}", line)
} else if element[0] == '[' && element[len(element)-1] == ']' {
// Nested array
tokens.AppendToken(TOKEN_PUNCTUATION, "[", line)
optimizedTokenizeArrayElements(element[1:len(element)-1], tokens, line)
tokens.AppendToken(TOKEN_PUNCTUATION, "]", line)
} else if (element[0] == '\'' && element[len(element)-1] == '\'') ||
(element[0] == '"' && element[len(element)-1] == '"') {
// String literal
tokens.AppendToken(TOKEN_STRING, element[1:len(element)-1], line)
} else if isNumericValue(element) {
// Numeric value
tokens.AppendToken(TOKEN_NUMBER, element, line)
} else if element == "true" || element == "false" {
// Boolean literal
tokens.AppendToken(TOKEN_NAME, element, line)
} else if element == "null" || element == "nil" {
// Null/nil literal
tokens.AppendToken(TOKEN_NAME, element, line)
} else {
// Variable or other value
tokens.AppendToken(TOKEN_NAME, element, line)
}
}
}
// Add comma if needed
if isComma && i < len(arrStr)-1 {
tokens.AppendToken(TOKEN_PUNCTUATION, ",", line)
}
// Move to next element
elemStart = i + 1
continue
}
// Handle quotes and nested structures
if !atEnd {
c := arrStr[i]
// Handle quote characters
if c == '\'' && (i == 0 || arrStr[i-1] != '\\') {
inSingleQuote = !inSingleQuote
} else if c == '"' && (i == 0 || arrStr[i-1] != '\\') {
inDoubleQuote = !inDoubleQuote
}
// Skip everything inside quotes
if inSingleQuote || inDoubleQuote {
continue
}
// Handle nesting
if c == '{' {
inObject++
} else if c == '}' {
inObject--
} else if c == '[' {
inArray++
} else if c == ']' {
inArray--
}
}
}
}

124
node.go
View file

@ -49,78 +49,42 @@ func NewForNode(keyVar, valueVar string, sequence Node, body, elseBranch []Node,
// NewBlockNode creates a new block node
func NewBlockNode(name string, body []Node, line int) *BlockNode {
return &BlockNode{
name: name,
body: body,
line: line,
}
return GetBlockNode(name, body, line)
}
// NewExtendsNode creates a new extends node
func NewExtendsNode(parent Node, line int) *ExtendsNode {
return &ExtendsNode{
parent: parent,
line: line,
}
return GetExtendsNode(parent, line)
}
// NewIncludeNode creates a new include node
func NewIncludeNode(template Node, variables map[string]Node, ignoreMissing, only, sandboxed bool, line int) *IncludeNode {
return &IncludeNode{
template: template,
variables: variables,
ignoreMissing: ignoreMissing,
only: only,
sandboxed: sandboxed,
line: line,
}
return GetIncludeNode(template, variables, ignoreMissing, only, sandboxed, line)
}
// NewSetNode creates a new set node
func NewSetNode(name string, value Node, line int) *SetNode {
return &SetNode{
name: name,
value: value,
line: line,
}
return GetSetNode(name, value, line)
}
// NewCommentNode creates a new comment node
func NewCommentNode(content string, line int) *CommentNode {
return &CommentNode{
content: content,
line: line,
}
return GetCommentNode(content, line)
}
// NewMacroNode creates a new macro node
func NewMacroNode(name string, params []string, defaults map[string]Node, body []Node, line int) *MacroNode {
return &MacroNode{
name: name,
params: params,
defaults: defaults,
body: body,
line: line,
}
return GetMacroNode(name, params, defaults, body, line)
}
// NewImportNode creates a new import node
func NewImportNode(template Node, module string, line int) *ImportNode {
return &ImportNode{
template: template,
module: module,
line: line,
}
return GetImportNode(template, module, line)
}
// NewFromImportNode creates a new from import node
func NewFromImportNode(template Node, macros []string, aliases map[string]string, line int) *FromImportNode {
return &FromImportNode{
template: template,
macros: macros,
aliases: aliases,
line: line,
}
return GetFromImportNode(template, macros, aliases, line)
}
// NodeType represents the type of a node
@ -614,6 +578,11 @@ func (n *BlockNode) Line() int {
return n.line
}
// Release returns a BlockNode to the pool
func (n *BlockNode) Release() {
ReleaseBlockNode(n)
}
// Render renders the block node
func (n *BlockNode) Render(w io.Writer, ctx *RenderContext) error {
// Determine which content to use - from context blocks or default
@ -676,6 +645,11 @@ func (n *ExtendsNode) Line() int {
return n.line
}
// Release returns an ExtendsNode to the pool
func (n *ExtendsNode) Release() {
ReleaseExtendsNode(n)
}
// Implement Node interface for ExtendsNode
func (n *ExtendsNode) Render(w io.Writer, ctx *RenderContext) error {
// Flag that this template extends another
@ -780,6 +754,11 @@ func (n *IncludeNode) Line() int {
return n.line
}
// Release returns an IncludeNode to the pool
func (n *IncludeNode) Release() {
ReleaseIncludeNode(n)
}
// Implement Node interface for IncludeNode
func (n *IncludeNode) Render(w io.Writer, ctx *RenderContext) error {
// Get the template name
@ -898,6 +877,11 @@ func (n *SetNode) Line() int {
return n.line
}
// Release returns a SetNode to the pool
func (n *SetNode) Release() {
ReleaseSetNode(n)
}
// Render renders the set node
func (n *SetNode) Render(w io.Writer, ctx *RenderContext) error {
// Evaluate the value
@ -919,10 +903,7 @@ type DoNode struct {
// NewDoNode creates a new DoNode
func NewDoNode(expression Node, line int) *DoNode {
return &DoNode{
expression: expression,
line: line,
}
return GetDoNode(expression, line)
}
func (n *DoNode) Type() NodeType {
@ -933,6 +914,11 @@ func (n *DoNode) Line() int {
return n.line
}
// Release returns a DoNode to the pool
func (n *DoNode) Release() {
ReleaseDoNode(n)
}
// Render evaluates the expression but doesn't write anything
func (n *DoNode) Render(w io.Writer, ctx *RenderContext) error {
// Evaluate the expression but ignore the result
@ -954,6 +940,11 @@ func (n *CommentNode) Line() int {
return n.line
}
// Release returns a CommentNode to the pool
func (n *CommentNode) Release() {
ReleaseCommentNode(n)
}
// Render renders the comment node (does nothing, as comments are not rendered)
func (n *CommentNode) Render(w io.Writer, ctx *RenderContext) error {
// Comments are not rendered
@ -977,6 +968,11 @@ func (n *MacroNode) Line() int {
return n.line
}
// Release returns a MacroNode to the pool
func (n *MacroNode) Release() {
ReleaseMacroNode(n)
}
// Render renders the macro node
func (n *MacroNode) Render(w io.Writer, ctx *RenderContext) error {
// Register the macro in the context
@ -1165,6 +1161,11 @@ func (n *ImportNode) Line() int {
return n.line
}
// Release returns an ImportNode to the pool
func (n *ImportNode) Release() {
ReleaseImportNode(n)
}
// Implement Node interface for ImportNode
func (n *ImportNode) Render(w io.Writer, ctx *RenderContext) error {
// Get the template name
@ -1249,6 +1250,11 @@ func (n *FromImportNode) Line() int {
return n.line
}
// Release returns a FromImportNode to the pool
func (n *FromImportNode) Release() {
ReleaseFromImportNode(n)
}
// Implement Node interface for FromImportNode
func (n *FromImportNode) Render(w io.Writer, ctx *RenderContext) error {
// Get the template name
@ -1332,10 +1338,7 @@ type VerbatimNode struct {
// NewVerbatimNode creates a new verbatim node
func NewVerbatimNode(content string, line int) *VerbatimNode {
return &VerbatimNode{
content: content,
line: line,
}
return GetVerbatimNode(content, line)
}
func (n *VerbatimNode) Type() NodeType {
@ -1346,6 +1349,11 @@ func (n *VerbatimNode) Line() int {
return n.line
}
// Release returns a VerbatimNode to the pool
func (n *VerbatimNode) Release() {
ReleaseVerbatimNode(n)
}
// Render renders the verbatim node (outputs raw content without processing)
func (n *VerbatimNode) Render(w io.Writer, ctx *RenderContext) error {
// Output the content as-is without any processing
@ -1381,12 +1389,7 @@ type ApplyNode struct {
// NewApplyNode creates a new apply node
func NewApplyNode(body []Node, filter string, args []Node, line int) *ApplyNode {
return &ApplyNode{
body: body,
filter: filter,
args: args,
line: line,
}
return GetApplyNode(body, filter, args, line)
}
func (n *ApplyNode) Type() NodeType {
@ -1397,6 +1400,11 @@ func (n *ApplyNode) Line() int {
return n.line
}
// Release returns an ApplyNode to the pool
func (n *ApplyNode) Release() {
ReleaseApplyNode(n)
}
// Render renders the apply node by applying a filter to the rendered body
func (n *ApplyNode) Render(w io.Writer, ctx *RenderContext) error {
// First render body content to a buffer

49
node_pool.go
View file

@ -79,53 +79,8 @@ func ReleaseRootNode(node *RootNode) {
RootNodePool.Put(node)
}
// LiteralNodePool provides a pool for LiteralNode objects
var LiteralNodePool = sync.Pool{
New: func() interface{} {
return &LiteralNode{}
},
}
// GetLiteralNode gets a LiteralNode from the pool and initializes it
func GetLiteralNode(value interface{}, line int) *LiteralNode {
node := LiteralNodePool.Get().(*LiteralNode)
node.value = value
node.line = line
return node
}
// ReleaseLiteralNode returns a LiteralNode to the pool
func ReleaseLiteralNode(node *LiteralNode) {
if node == nil {
return
}
node.value = nil
LiteralNodePool.Put(node)
}
// VariableNodePool provides a pool for VariableNode objects
var VariableNodePool = sync.Pool{
New: func() interface{} {
return &VariableNode{}
},
}
// GetVariableNode gets a VariableNode from the pool and initializes it
func GetVariableNode(name string, line int) *VariableNode {
node := VariableNodePool.Get().(*VariableNode)
node.name = name
node.line = line
return node
}
// ReleaseVariableNode returns a VariableNode to the pool
func ReleaseVariableNode(node *VariableNode) {
if node == nil {
return
}
node.name = ""
VariableNodePool.Put(node)
}
// Note: LiteralNodePool, GetLiteralNode, ReleaseLiteralNode moved to expr_pool.go
// Note: VariableNodePool, GetVariableNode, ReleaseVariableNode moved to expr_pool.go
// TokenPool provides a pool for Token objects
var TokenPool = sync.Pool{

300
node_pool_extensions.go Normal file
View file

@ -0,0 +1,300 @@
package twig
import (
"sync"
)
// This file extends the node pool system to cover all node types,
// following the implementation strategy in the zero-allocation plan.
// BlockNodePool provides a pool for BlockNode objects
var BlockNodePool = sync.Pool{
New: func() interface{} {
return &BlockNode{}
},
}
// GetBlockNode gets a BlockNode from the pool and initializes it
func GetBlockNode(name string, body []Node, line int) *BlockNode {
node := BlockNodePool.Get().(*BlockNode)
node.name = name
node.body = body
node.line = line
return node
}
// ReleaseBlockNode returns a BlockNode to the pool
func ReleaseBlockNode(node *BlockNode) {
if node == nil {
return
}
node.name = ""
node.body = nil
BlockNodePool.Put(node)
}
// ExtendsNodePool provides a pool for ExtendsNode objects
var ExtendsNodePool = sync.Pool{
New: func() interface{} {
return &ExtendsNode{}
},
}
// GetExtendsNode gets an ExtendsNode from the pool and initializes it
func GetExtendsNode(parent Node, line int) *ExtendsNode {
node := ExtendsNodePool.Get().(*ExtendsNode)
node.parent = parent
node.line = line
return node
}
// ReleaseExtendsNode returns an ExtendsNode to the pool
func ReleaseExtendsNode(node *ExtendsNode) {
if node == nil {
return
}
node.parent = nil
ExtendsNodePool.Put(node)
}
// IncludeNodePool provides a pool for IncludeNode objects
var IncludeNodePool = sync.Pool{
New: func() interface{} {
return &IncludeNode{}
},
}
// GetIncludeNode gets an IncludeNode from the pool and initializes it
func GetIncludeNode(template Node, variables map[string]Node, ignoreMissing, only, sandboxed bool, line int) *IncludeNode {
node := IncludeNodePool.Get().(*IncludeNode)
node.template = template
node.variables = variables
node.ignoreMissing = ignoreMissing
node.only = only
node.sandboxed = sandboxed
node.line = line
return node
}
// ReleaseIncludeNode returns an IncludeNode to the pool
func ReleaseIncludeNode(node *IncludeNode) {
if node == nil {
return
}
node.template = nil
node.variables = nil
node.ignoreMissing = false
node.only = false
node.sandboxed = false
IncludeNodePool.Put(node)
}
// SetNodePool provides a pool for SetNode objects
var SetNodePool = sync.Pool{
New: func() interface{} {
return &SetNode{}
},
}
// GetSetNode gets a SetNode from the pool and initializes it
func GetSetNode(name string, value Node, line int) *SetNode {
node := SetNodePool.Get().(*SetNode)
node.name = name
node.value = value
node.line = line
return node
}
// ReleaseSetNode returns a SetNode to the pool
func ReleaseSetNode(node *SetNode) {
if node == nil {
return
}
node.name = ""
node.value = nil
SetNodePool.Put(node)
}
// CommentNodePool provides a pool for CommentNode objects
var CommentNodePool = sync.Pool{
New: func() interface{} {
return &CommentNode{}
},
}
// GetCommentNode gets a CommentNode from the pool and initializes it
func GetCommentNode(content string, line int) *CommentNode {
node := CommentNodePool.Get().(*CommentNode)
node.content = content
node.line = line
return node
}
// ReleaseCommentNode returns a CommentNode to the pool
func ReleaseCommentNode(node *CommentNode) {
if node == nil {
return
}
node.content = ""
CommentNodePool.Put(node)
}
// MacroNodePool provides a pool for MacroNode objects
var MacroNodePool = sync.Pool{
New: func() interface{} {
return &MacroNode{}
},
}
// GetMacroNode gets a MacroNode from the pool and initializes it
func GetMacroNode(name string, params []string, defaults map[string]Node, body []Node, line int) *MacroNode {
node := MacroNodePool.Get().(*MacroNode)
node.name = name
node.params = params
node.defaults = defaults
node.body = body
node.line = line
return node
}
// ReleaseMacroNode returns a MacroNode to the pool
func ReleaseMacroNode(node *MacroNode) {
if node == nil {
return
}
node.name = ""
node.params = nil
node.defaults = nil
node.body = nil
MacroNodePool.Put(node)
}
// ImportNodePool provides a pool for ImportNode objects
var ImportNodePool = sync.Pool{
New: func() interface{} {
return &ImportNode{}
},
}
// GetImportNode gets an ImportNode from the pool and initializes it
func GetImportNode(template Node, module string, line int) *ImportNode {
node := ImportNodePool.Get().(*ImportNode)
node.template = template
node.module = module
node.line = line
return node
}
// ReleaseImportNode returns an ImportNode to the pool
func ReleaseImportNode(node *ImportNode) {
if node == nil {
return
}
node.template = nil
node.module = ""
ImportNodePool.Put(node)
}
// FromImportNodePool provides a pool for FromImportNode objects
var FromImportNodePool = sync.Pool{
New: func() interface{} {
return &FromImportNode{}
},
}
// GetFromImportNode gets a FromImportNode from the pool and initializes it
func GetFromImportNode(template Node, macros []string, aliases map[string]string, line int) *FromImportNode {
node := FromImportNodePool.Get().(*FromImportNode)
node.template = template
node.macros = macros
node.aliases = aliases
node.line = line
return node
}
// ReleaseFromImportNode returns a FromImportNode to the pool
func ReleaseFromImportNode(node *FromImportNode) {
if node == nil {
return
}
node.template = nil
node.macros = nil
node.aliases = nil
FromImportNodePool.Put(node)
}
// VerbatimNodePool provides a pool for VerbatimNode objects
var VerbatimNodePool = sync.Pool{
New: func() interface{} {
return &VerbatimNode{}
},
}
// GetVerbatimNode gets a VerbatimNode from the pool and initializes it
func GetVerbatimNode(content string, line int) *VerbatimNode {
node := VerbatimNodePool.Get().(*VerbatimNode)
node.content = content
node.line = line
return node
}
// ReleaseVerbatimNode returns a VerbatimNode to the pool
func ReleaseVerbatimNode(node *VerbatimNode) {
if node == nil {
return
}
node.content = ""
VerbatimNodePool.Put(node)
}
// DoNodePool provides a pool for DoNode objects
var DoNodePool = sync.Pool{
New: func() interface{} {
return &DoNode{}
},
}
// GetDoNode gets a DoNode from the pool and initializes it
func GetDoNode(expression Node, line int) *DoNode {
node := DoNodePool.Get().(*DoNode)
node.expression = expression
node.line = line
return node
}
// ReleaseDoNode returns a DoNode to the pool
func ReleaseDoNode(node *DoNode) {
if node == nil {
return
}
node.expression = nil
DoNodePool.Put(node)
}
// ApplyNodePool provides a pool for ApplyNode objects
var ApplyNodePool = sync.Pool{
New: func() interface{} {
return &ApplyNode{}
},
}
// GetApplyNode gets an ApplyNode from the pool and initializes it
func GetApplyNode(body []Node, filter string, args []Node, line int) *ApplyNode {
node := ApplyNodePool.Get().(*ApplyNode)
node.body = body
node.filter = filter
node.args = args
node.line = line
return node
}
// ReleaseApplyNode returns an ApplyNode to the pool
func ReleaseApplyNode(node *ApplyNode) {
if node == nil {
return
}
node.body = nil
node.filter = ""
node.args = nil
ApplyNodePool.Put(node)
}

100
parse_do.go
View file

@ -9,48 +9,82 @@ func (p *Parser) parseDo(parser *Parser) (Node, error) {
// Get the line number for error reporting
doLine := parser.tokens[parser.tokenIndex-2].Line
// Check if we have an empty do tag ({% do %})
if parser.tokenIndex < len(parser.tokens) && parser.tokens[parser.tokenIndex].Type == TOKEN_BLOCK_END {
// Empty do tag is not valid
return nil, fmt.Errorf("do tag cannot be empty at line %d", doLine)
}
// Check for special case: assignment expressions
// These need to be handled specially since they're not normal expressions
if parser.tokenIndex < len(parser.tokens) &&
parser.tokens[parser.tokenIndex].Type == TOKEN_NAME {
if parser.tokenIndex < len(parser.tokens) {
// Look ahead to find possible assignment patterns
// We need to check for NUMBER = EXPR which is invalid
// as well as NAME = EXPR which is valid
varName := parser.tokens[parser.tokenIndex].Value
parser.tokenIndex++
// Check if we have an equals sign in the next few tokens
hasAssignment := false
equalsPosition := -1
if parser.tokenIndex < len(parser.tokens) &&
parser.tokens[parser.tokenIndex].Type == TOKEN_OPERATOR &&
parser.tokens[parser.tokenIndex].Value == "=" {
// Skip the equals sign
parser.tokenIndex++
// Parse the right side expression
expr, err := parser.parseExpression()
if err != nil {
return nil, fmt.Errorf("error parsing expression in do assignment at line %d: %w", doLine, err)
// Scan ahead a bit to find possible equals sign
for i := 0; i < 3 && parser.tokenIndex+i < len(parser.tokens); i++ {
token := parser.tokens[parser.tokenIndex+i]
if token.Type == TOKEN_OPERATOR && token.Value == "=" {
hasAssignment = true
equalsPosition = i
break
}
// Make sure we have the closing tag
if parser.tokenIndex >= len(parser.tokens) || parser.tokens[parser.tokenIndex].Type != TOKEN_BLOCK_END {
return nil, fmt.Errorf("expecting end of do tag at line %d", doLine)
// Stop scanning if we hit the end of the block
if token.Type == TOKEN_BLOCK_END {
break
}
parser.tokenIndex++
// Validate the variable name - it should not be a numeric literal
if _, err := strconv.Atoi(varName); err == nil {
return nil, fmt.Errorf("invalid variable name %q in do tag assignment at line %d", varName, doLine)
}
// Create a SetNode instead of DoNode for assignments
return &SetNode{
name: varName,
value: expr,
line: doLine,
}, nil
}
// If it wasn't an assignment, backtrack to parse it as a normal expression
parser.tokenIndex -= 1
// If we found an equals sign, analyze the left-hand side
if hasAssignment && equalsPosition > 0 {
firstToken := parser.tokens[parser.tokenIndex]
// Check if the left-hand side is a valid variable name
isValidVariableName := firstToken.Type == TOKEN_NAME
// If the left-hand side is a number or literal, that's an error
if !isValidVariableName {
return nil, fmt.Errorf("invalid variable name %q in do tag assignment at line %d", firstToken.Value, doLine)
}
// Handle assignment case
if isValidVariableName && hasAssignment {
varName := parser.tokens[parser.tokenIndex].Value
// Skip tokens up to and including the equals sign
parser.tokenIndex += equalsPosition + 1
// Parse the right side expression
expr, err := parser.parseExpression()
if err != nil {
return nil, fmt.Errorf("error parsing expression in do assignment at line %d: %w", doLine, err)
}
// Make sure we have the closing tag
if parser.tokenIndex >= len(parser.tokens) || parser.tokens[parser.tokenIndex].Type != TOKEN_BLOCK_END {
return nil, fmt.Errorf("expecting end of do tag at line %d", doLine)
}
parser.tokenIndex++
// Additional validation for variable name
if _, err := strconv.Atoi(varName); err == nil {
return nil, fmt.Errorf("invalid variable name %q in do tag assignment at line %d", varName, doLine)
}
// Create a SetNode instead of DoNode for assignments
return &SetNode{
name: varName,
value: expr,
line: doLine,
}, nil
}
}
}
// Parse the expression to be executed

103
parse_from.go
View file

@ -12,8 +12,107 @@ func (p *Parser) parseFrom(parser *Parser) (Node, error) {
// Get the line number of the from token
fromLine := parser.tokens[parser.tokenIndex-1].Line
// We need to manually extract the template path, import keyword, and macro(s) from
// the current token. The tokenizer seems to be combining them.
// Debugging: Print out tokens for debugging purposes
if IsDebugEnabled() {
LogDebug("Parsing from tag. Next tokens (up to 10):")
for i := 0; i < 10 && i+parser.tokenIndex < len(parser.tokens); i++ {
if parser.tokenIndex+i < len(parser.tokens) {
token := parser.tokens[parser.tokenIndex+i]
LogDebug(" Token %d: Type=%d, Value=%q", i, token.Type, token.Value)
}
}
}
// First try to parse in token-by-token format (from zero-allocation tokenizer)
// Check if we have a proper sequence: [STRING/NAME, NAME="import", NAME="macroname", ...]
if parser.tokenIndex+1 < len(parser.tokens) {
// Check for (template path) followed by "import" keyword
firstToken := parser.tokens[parser.tokenIndex]
secondToken := parser.tokens[parser.tokenIndex+1]
isTemplatePath := firstToken.Type == TOKEN_STRING || firstToken.Type == TOKEN_NAME
isImportKeyword := secondToken.Type == TOKEN_NAME && secondToken.Value == "import"
if isTemplatePath && isImportKeyword {
LogDebug("Found tokenized from...import pattern")
// Get template path
templatePath := firstToken.Value
if firstToken.Type == TOKEN_NAME {
// For paths like ./file.twig, just use the value
templatePath = strings.Trim(templatePath, "\"'")
}
// Create template expression
templateExpr := &LiteralNode{
ExpressionNode: ExpressionNode{
exprType: ExprLiteral,
line: fromLine,
},
value: templatePath,
}
// Skip past the template path and import keyword
parser.tokenIndex += 2
// Parse macros and aliases
macros := []string{}
aliases := map[string]string{}
// Process tokens until end of block
for parser.tokenIndex < len(parser.tokens) {
token := parser.tokens[parser.tokenIndex]
// Stop at block end
if token.Type == TOKEN_BLOCK_END || token.Type == TOKEN_BLOCK_END_TRIM {
parser.tokenIndex++
break
}
// Skip punctuation (commas)
if token.Type == TOKEN_PUNCTUATION {
parser.tokenIndex++
continue
}
// Handle macro name
if token.Type == TOKEN_NAME {
macroName := token.Value
// Add to macros list
macros = append(macros, macroName)
// Check for alias
parser.tokenIndex++
if parser.tokenIndex < len(parser.tokens) &&
parser.tokens[parser.tokenIndex].Type == TOKEN_NAME &&
parser.tokens[parser.tokenIndex].Value == "as" {
// Skip 'as' keyword
parser.tokenIndex++
// Get alias
if parser.tokenIndex < len(parser.tokens) && parser.tokens[parser.tokenIndex].Type == TOKEN_NAME {
aliases[macroName] = parser.tokens[parser.tokenIndex].Value
parser.tokenIndex++
}
}
} else {
// Skip any other token
parser.tokenIndex++
}
}
// If we found macros, return a FromImportNode
if len(macros) > 0 {
return NewFromImportNode(templateExpr, macros, aliases, fromLine), nil
}
}
}
// Fall back to the original approach (for backward compatibility)
// We need to extract the template path, import keyword, and macro(s) from
// the current token. The tokenizer may be combining them.
if parser.tokenIndex < len(parser.tokens) && parser.tokens[parser.tokenIndex].Type == TOKEN_NAME {
// Extract parts from the combined token value
tokenValue := parser.tokens[parser.tokenIndex].Value

1
parse_macro.go
View file

@ -162,7 +162,6 @@ func (p *Parser) parseMacro(parser *Parser) (Node, error) {
}
paramName := parser.tokens[parser.tokenIndex].Value
fmt.Println("DEBUG: Parameter name:", paramName)
params = append(params, paramName)
parser.tokenIndex++

21
parser.go
View file

@ -59,19 +59,28 @@ func (p *Parser) Parse(source string) (Node, error) {
// Initialize default block handlers
p.initBlockHandlers()
// Use the HTML-preserving tokenizer to preserve HTML content exactly
// Use the zero-allocation tokenizer for maximum performance and minimal allocations
// This will treat everything outside twig tags as TEXT tokens
var err error
p.tokens, err = p.htmlPreservingTokenize()
// Use the zero-allocation tokenizer to achieve minimal memory usage and high performance
tokenizer := GetTokenizer(p.source, 0)
p.tokens, err = tokenizer.TokenizeHtmlPreserving()
// Apply whitespace control to handle whitespace trimming directives
if err == nil {
tokenizer.ApplyWhitespaceControl()
}
// Release the tokenizer back to the pool
ReleaseTokenizer(tokenizer)
if err != nil {
return nil, fmt.Errorf("tokenization error: %w", err)
}
// Template tokenization complete
// Apply whitespace control processing to the tokens to handle
// the whitespace trimming between template elements
p.tokens = processWhitespaceControl(p.tokens)
// Whitespace control has already been applied by the tokenizer
// Parse tokens into nodes
nodes, err := p.parseOuterTemplate()

6
relative_path_test.go
View file

@ -80,7 +80,13 @@ func TestRelativePathsWithFromImport(t *testing.T) {
// Create simple macro templates
macrosTemplate := `{% macro simple() %}Macro output{% endmacro %}`
// Print the template content for debugging
t.Logf("Simple template content: %s", macrosTemplate)
// Note: The template needs to be in the format: {% from "template" import macro %}
useTemplate := `{% from "./simple.twig" import simple %}{{ simple() }}`
t.Logf("Use template content: %s", useTemplate)
// Write templates to files
err = os.WriteFile(filepath.Join(macrosDir, "simple.twig"), []byte(macrosTemplate), 0644)

234
render.go
View file

@ -30,14 +30,35 @@ type RenderContext struct {
sandboxed bool // Flag indicating if this context is sandboxed
}
// contextMapPool is a pool for the maps used in RenderContext
var contextMapPool = sync.Pool{
New: func() interface{} {
return make(map[string]interface{}, 16) // Pre-allocate with reasonable size
},
}
// blocksMapPool is a pool for the blocks map used in RenderContext
var blocksMapPool = sync.Pool{
New: func() interface{} {
return make(map[string][]Node, 8) // Pre-allocate with reasonable size
},
}
// macrosMapPool is a pool for the macros map used in RenderContext
var macrosMapPool = sync.Pool{
New: func() interface{} {
return make(map[string]Node, 8) // Pre-allocate with reasonable size
},
}
// renderContextPool is a sync.Pool for RenderContext objects
var renderContextPool = sync.Pool{
New: func() interface{} {
return &RenderContext{
context: make(map[string]interface{}),
blocks: make(map[string][]Node),
parentBlocks: make(map[string][]Node),
macros: make(map[string]Node),
context: contextMapPool.Get().(map[string]interface{}),
blocks: blocksMapPool.Get().(map[string][]Node),
parentBlocks: blocksMapPool.Get().(map[string][]Node),
macros: macrosMapPool.Get().(map[string]Node),
}
},
}
@ -46,17 +67,44 @@ var renderContextPool = sync.Pool{
func NewRenderContext(env *Environment, context map[string]interface{}, engine *Engine) *RenderContext {
ctx := renderContextPool.Get().(*RenderContext)
// Reset and initialize the context
for k := range ctx.context {
delete(ctx.context, k)
}
for k := range ctx.blocks {
delete(ctx.blocks, k)
}
for k := range ctx.macros {
delete(ctx.macros, k)
// Ensure all maps are initialized (should be from the pool)
if ctx.context == nil {
ctx.context = contextMapPool.Get().(map[string]interface{})
} else {
// Clear any existing data
for k := range ctx.context {
delete(ctx.context, k)
}
}
if ctx.blocks == nil {
ctx.blocks = blocksMapPool.Get().(map[string][]Node)
} else {
// Clear any existing data
for k := range ctx.blocks {
delete(ctx.blocks, k)
}
}
if ctx.parentBlocks == nil {
ctx.parentBlocks = blocksMapPool.Get().(map[string][]Node)
} else {
// Clear any existing data
for k := range ctx.parentBlocks {
delete(ctx.parentBlocks, k)
}
}
if ctx.macros == nil {
ctx.macros = macrosMapPool.Get().(map[string]Node)
} else {
// Clear any existing data
for k := range ctx.macros {
delete(ctx.macros, k)
}
}
// Set basic properties
ctx.env = env
ctx.engine = engine
ctx.extending = false
@ -65,7 +113,7 @@ func NewRenderContext(env *Environment, context map[string]interface{}, engine *
ctx.inParentCall = false
ctx.sandboxed = false
// Copy the context values
// Copy the context values directly
if context != nil {
for k, v := range context {
ctx.context[k] = v
@ -82,25 +130,52 @@ func (ctx *RenderContext) Release() {
ctx.engine = nil
ctx.currentBlock = nil
// Clear map contents but keep allocated maps
for k := range ctx.context {
delete(ctx.context, k)
}
for k := range ctx.blocks {
delete(ctx.blocks, k)
}
for k := range ctx.parentBlocks {
delete(ctx.parentBlocks, k)
}
for k := range ctx.macros {
delete(ctx.macros, k)
}
// Save the maps so we can return them to their respective pools
contextMap := ctx.context
blocksMap := ctx.blocks
parentBlocksMap := ctx.parentBlocks
macrosMap := ctx.macros
// Clear the maps from the context
ctx.context = nil
ctx.blocks = nil
ctx.parentBlocks = nil
ctx.macros = nil
// Don't release parent contexts - they'll be released separately
ctx.parent = nil
// Return to pool
renderContextPool.Put(ctx)
// Clear map contents and return them to their pools
if contextMap != nil {
for k := range contextMap {
delete(contextMap, k)
}
contextMapPool.Put(contextMap)
}
if blocksMap != nil {
for k := range blocksMap {
delete(blocksMap, k)
}
blocksMapPool.Put(blocksMap)
}
if parentBlocksMap != nil {
for k := range parentBlocksMap {
delete(parentBlocksMap, k)
}
blocksMapPool.Put(parentBlocksMap)
}
if macrosMap != nil {
for k := range macrosMap {
delete(macrosMap, k)
}
macrosMapPool.Put(macrosMap)
}
}
// Error types
@ -242,21 +317,63 @@ func (ctx *RenderContext) IsSandboxed() bool {
// Clone creates a new context as a child of the current context
func (ctx *RenderContext) Clone() *RenderContext {
// Create a new context
newCtx := NewRenderContext(ctx.env, make(map[string]interface{}), ctx.engine)
// Get a new context from the pool with empty maps
newCtx := renderContextPool.Get().(*RenderContext)
// Set parent relationship
// Initialize the context
newCtx.env = ctx.env
newCtx.engine = ctx.engine
newCtx.extending = false
newCtx.currentBlock = nil
newCtx.parent = ctx
newCtx.inParentCall = false
// Inherit sandbox state
newCtx.sandboxed = ctx.sandboxed
// Copy blocks
// Ensure maps are initialized (they should be from the pool already)
if newCtx.context == nil {
newCtx.context = contextMapPool.Get().(map[string]interface{})
} else {
// Clear any existing data
for k := range newCtx.context {
delete(newCtx.context, k)
}
}
if newCtx.blocks == nil {
newCtx.blocks = blocksMapPool.Get().(map[string][]Node)
} else {
// Clear any existing data
for k := range newCtx.blocks {
delete(newCtx.blocks, k)
}
}
if newCtx.macros == nil {
newCtx.macros = macrosMapPool.Get().(map[string]Node)
} else {
// Clear any existing data
for k := range newCtx.macros {
delete(newCtx.macros, k)
}
}
if newCtx.parentBlocks == nil {
newCtx.parentBlocks = blocksMapPool.Get().(map[string][]Node)
} else {
// Clear any existing data
for k := range newCtx.parentBlocks {
delete(newCtx.parentBlocks, k)
}
}
// Copy blocks by reference (no need to deep copy)
for name, nodes := range ctx.blocks {
newCtx.blocks[name] = nodes
}
// Copy macros
// Copy macros by reference (no need to deep copy)
for name, macro := range ctx.macros {
newCtx.macros[name] = macro
}
@ -287,14 +404,14 @@ func (ctx *RenderContext) GetMacros() map[string]Node {
// InitMacros initializes the macros map if it's nil
func (ctx *RenderContext) InitMacros() {
if ctx.macros == nil {
ctx.macros = make(map[string]Node)
ctx.macros = macrosMapPool.Get().(map[string]Node)
}
}
// SetMacro sets a macro in the context
func (ctx *RenderContext) SetMacro(name string, macro Node) {
if ctx.macros == nil {
ctx.macros = make(map[string]Node)
ctx.macros = macrosMapPool.Get().(map[string]Node)
}
ctx.macros[name] = macro
}
@ -658,14 +775,16 @@ func (ctx *RenderContext) EvaluateExpression(node Node) (interface{}, error) {
}
case *ArrayNode:
// Evaluate each item in the array
items := make([]interface{}, len(n.items))
for i, item := range n.items {
val, err := ctx.EvaluateExpression(item)
// We need to avoid pooling for arrays that might be directly used by filters like merge
// as those filters return the slice directly to the user
items := make([]interface{}, 0, len(n.items))
for i := 0; i < len(n.items); i++ {
val, err := ctx.EvaluateExpression(n.items[i])
if err != nil {
return nil, err
}
items[i] = val
items = append(items, val)
}
// Always return a non-nil slice, even if empty
@ -676,8 +795,10 @@ func (ctx *RenderContext) EvaluateExpression(node Node) (interface{}, error) {
return items, nil
case *HashNode:
// Evaluate each key-value pair in the hash
result := make(map[string]interface{})
// Evaluate each key-value pair in the hash using a new map
// We can't use pooling with defer here because the map is returned directly
result := make(map[string]interface{}, len(n.items))
for k, v := range n.items {
// Evaluate the key
keyVal, err := ctx.EvaluateExpression(k)
@ -712,10 +833,11 @@ func (ctx *RenderContext) EvaluateExpression(node Node) (interface{}, error) {
return nil, err
}
// Evaluate all arguments
// Evaluate all arguments - need direct allocation
args := make([]interface{}, len(n.args))
for i, arg := range n.args {
val, err := ctx.EvaluateExpression(arg)
for i := 0; i < len(n.args); i++ {
val, err := ctx.EvaluateExpression(n.args[i])
if err != nil {
return nil, err
}
@ -753,10 +875,12 @@ func (ctx *RenderContext) EvaluateExpression(node Node) (interface{}, error) {
// Check if it's a macro call
if macro, ok := ctx.GetMacro(n.name); ok {
// Evaluate arguments
// Evaluate arguments - need direct allocation for macro calls
args := make([]interface{}, len(n.args))
for i, arg := range n.args {
val, err := ctx.EvaluateExpression(arg)
// Evaluate arguments
for i := 0; i < len(n.args); i++ {
val, err := ctx.EvaluateExpression(n.args[i])
if err != nil {
return nil, err
}
@ -774,10 +898,12 @@ func (ctx *RenderContext) EvaluateExpression(node Node) (interface{}, error) {
}
// Otherwise, it's a regular function call
// Evaluate arguments
// Evaluate arguments - need direct allocation for function calls
args := make([]interface{}, len(n.args))
for i, arg := range n.args {
val, err := ctx.EvaluateExpression(arg)
// Evaluate arguments
for i := 0; i < len(n.args); i++ {
val, err := ctx.EvaluateExpression(n.args[i])
if err != nil {
return nil, err
}
@ -894,10 +1020,12 @@ func (ctx *RenderContext) EvaluateExpression(node Node) (interface{}, error) {
return nil, err
}
// Evaluate test arguments
// Evaluate test arguments - need direct allocation
args := make([]interface{}, len(n.args))
for i, arg := range n.args {
val, err := ctx.EvaluateExpression(arg)
// Evaluate arguments
for i := 0; i < len(n.args); i++ {
val, err := ctx.EvaluateExpression(n.args[i])
if err != nil {
return nil, err
}

129
render_context_benchmark_test.go Normal file
View file

@ -0,0 +1,129 @@
package twig
import (
"testing"
)
func BenchmarkRenderContextCreation(b *testing.B) {
engine := New()
// Create a simple context with a few variables
contextVars := map[string]interface{}{
"user": map[string]interface{}{
"name": "John Doe",
"email": "john@example.com",
"age": 30,
},
"items": []string{"item1", "item2", "item3"},
"count": 42,
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
ctx := NewRenderContext(engine.environment, contextVars, engine)
ctx.Release() // Return to pool after use
}
}
func BenchmarkRenderContextCloning(b *testing.B) {
engine := New()
// Create a parent context with some variables, blocks, and macros
parentContext := map[string]interface{}{
"user": map[string]interface{}{
"name": "John Doe",
"email": "john@example.com",
},
"items": []string{"item1", "item2", "item3"},
}
// Create the parent context
parent := NewRenderContext(engine.environment, parentContext, engine)
// Add some blocks
header := &TextNode{content: "Header Content", line: 1}
footer := &TextNode{content: "Footer Content", line: 2}
parent.blocks["header"] = []Node{header}
parent.blocks["footer"] = []Node{footer}
// Add a simple macro
macroNode := &MacroNode{
name: "format",
line: 3,
}
parent.macros["format"] = macroNode
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Clone the context - this should reuse memory from pools
child := parent.Clone()
// Do some operations on the child context
child.SetVariable("newVar", "test value")
// Release the child context
child.Release()
}
// Clean up parent context
parent.Release()
}
func BenchmarkNestedContextCreation(b *testing.B) {
engine := New()
baseContext := map[string]interface{}{"base": "value"}
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Create a chain of 5 nested contexts
ctx1 := NewRenderContext(engine.environment, baseContext, engine)
ctx2 := ctx1.Clone()
ctx3 := ctx2.Clone()
ctx4 := ctx3.Clone()
ctx5 := ctx4.Clone()
// Make some changes to test variable lookup
ctx5.SetVariable("level5", "value5")
ctx3.SetVariable("level3", "value3")
// Release in reverse order
ctx5.Release()
ctx4.Release()
ctx3.Release()
ctx2.Release()
ctx1.Release()
}
}
func BenchmarkContextVariableLookup(b *testing.B) {
engine := New()
// Create a chain of contexts with variables at different levels
rootCtx := NewRenderContext(engine.environment, map[string]interface{}{
"rootVar": "root value",
"shared": "root version",
}, engine)
level1 := rootCtx.Clone()
level1.SetVariable("level1Var", "level1 value")
level1.SetVariable("shared", "level1 version")
level2 := level1.Clone()
level2.SetVariable("level2Var", "level2 value")
// Setup complete, start benchmark
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Test variable lookup at different levels
level2.GetVariable("level2Var") // Local var
level2.GetVariable("level1Var") // Parent var
level2.GetVariable("rootVar") // Root var
level2.GetVariable("shared") // Shadowed var
level2.GetVariable("nonExistentVar") // Missing var
}
// Clean up
level2.Release()
level1.Release()
rootCtx.Release()
}

521
token_pool_improved.go Normal file
View file

@ -0,0 +1,521 @@
package twig
import (
"fmt"
"strings"
"sync"
)
// ImprovedTokenSlice is a more efficient implementation of a token slice pool
// that truly minimizes allocations during tokenization
type ImprovedTokenSlice struct {
tokens []Token // The actual token slice
capacity int // Capacity hint for the token slice
used bool // Whether this slice has been used
}
// global pool for ImprovedTokenSlice objects
var improvedTokenSlicePool = sync.Pool{
New: func() interface{} {
// Start with a reasonably sized token slice
tokens := make([]Token, 0, 64)
return &ImprovedTokenSlice{
tokens: tokens,
capacity: 64,
used: false,
}
},
}
// Global token object pool
var tokenObjectPool = sync.Pool{
New: func() interface{} {
return &Token{}
},
}
// GetImprovedTokenSlice gets a token slice from the pool
func GetImprovedTokenSlice(capacityHint int) *ImprovedTokenSlice {
slice := improvedTokenSlicePool.Get().(*ImprovedTokenSlice)
// Reset the slice but keep capacity
if cap(slice.tokens) < capacityHint {
// Need to allocate a larger slice
slice.tokens = make([]Token, 0, capacityHint)
slice.capacity = capacityHint
} else {
// Reuse existing slice
slice.tokens = slice.tokens[:0]
}
slice.used = false
return slice
}
// AppendToken adds a token to the slice
func (s *ImprovedTokenSlice) AppendToken(tokenType int, value string, line int) {
if s.used {
return // Already finalized
}
// Create a token and add it to the slice
token := Token{
Type: tokenType,
Value: value,
Line: line,
}
s.tokens = append(s.tokens, token)
}
// Finalize returns the token slice
func (s *ImprovedTokenSlice) Finalize() []Token {
if s.used {
return s.tokens
}
s.used = true
return s.tokens
}
// Release returns the token slice to the pool
func (s *ImprovedTokenSlice) Release() {
if s.used && cap(s.tokens) <= 1024 { // Don't pool very large slices
// Only return reasonably sized slices to the pool
improvedTokenSlicePool.Put(s)
}
}
// optimizedTokenizeExpressionImproved is a minimal allocation version of tokenizeExpression
func (p *Parser) optimizedTokenizeExpressionImproved(expr string, tokens *ImprovedTokenSlice, line int) {
var inString bool
var stringDelimiter byte
var stringStart int
// Preallocate a buffer for building tokens
buffer := make([]byte, 0, 64)
for i := 0; i < len(expr); i++ {
c := expr[i]
// Handle string literals
if (c == '"' || c == '\'') && (i == 0 || expr[i-1] != '\\') {
if inString && c == stringDelimiter {
// End of string, add the string token
tokens.AppendToken(TOKEN_STRING, expr[stringStart:i], line)
inString = false
} else if !inString {
// Start of string
inString = true
stringDelimiter = c
stringStart = i + 1
}
continue
}
// Skip chars inside strings
if inString {
continue
}
// Handle operators
if isCharOperator(c) {
// Check for two-character operators
if i+1 < len(expr) {
nextChar := expr[i+1]
if (c == '=' && nextChar == '=') ||
(c == '!' && nextChar == '=') ||
(c == '>' && nextChar == '=') ||
(c == '<' && nextChar == '=') ||
(c == '&' && nextChar == '&') ||
(c == '|' && nextChar == '|') ||
(c == '?' && nextChar == '?') {
// Two-char operator
buffer = buffer[:0]
buffer = append(buffer, c, nextChar)
tokens.AppendToken(TOKEN_OPERATOR, string(buffer), line)
i++
continue
}
}
// Single-char operator
tokens.AppendToken(TOKEN_OPERATOR, string([]byte{c}), line)
continue
}
// Handle punctuation
if isCharPunctuation(c) {
tokens.AppendToken(TOKEN_PUNCTUATION, string([]byte{c}), line)
continue
}
// Skip whitespace
if isCharWhitespace(c) {
continue
}
// Handle identifiers, literals, etc.
if isCharAlpha(c) || c == '_' {
// Start of an identifier
start := i
// Find the end
for i++; i < len(expr) && (isCharAlpha(expr[i]) || isCharDigit(expr[i]) || expr[i] == '_'); i++ {
}
// Extract the identifier
identifier := expr[start:i]
i-- // Adjust for loop increment
// Add token
tokens.AppendToken(TOKEN_NAME, identifier, line)
continue
}
// Handle numbers
if isCharDigit(c) || (c == '-' && i+1 < len(expr) && isCharDigit(expr[i+1])) {
start := i
// Skip negative sign if present
if c == '-' {
i++
}
// Find end of number
for i++; i < len(expr) && isCharDigit(expr[i]); i++ {
}
// Check for decimal point
if i < len(expr) && expr[i] == '.' {
i++
for ; i < len(expr) && isCharDigit(expr[i]); i++ {
}
}
// Extract the number
number := expr[start:i]
i-- // Adjust for loop increment
tokens.AppendToken(TOKEN_NUMBER, number, line)
continue
}
}
}
// Helper functions to reduce allocations for character checks - inlined to avoid naming conflicts
// isCharAlpha checks if a character is alphabetic
func isCharAlpha(c byte) bool {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
}
// isCharDigit checks if a character is a digit
func isCharDigit(c byte) bool {
return c >= '0' && c <= '9'
}
// isCharOperator checks if a character is an operator
func isCharOperator(c byte) bool {
return c == '=' || c == '+' || c == '-' || c == '*' || c == '/' ||
c == '%' || c == '&' || c == '|' || c == '^' || c == '~' ||
c == '<' || c == '>' || c == '!' || c == '?'
}
// isCharPunctuation checks if a character is punctuation
func isCharPunctuation(c byte) bool {
return c == '(' || c == ')' || c == '[' || c == ']' || c == '{' || c == '}' ||
c == '.' || c == ',' || c == ':' || c == ';'
}
// isCharWhitespace checks if a character is whitespace
func isCharWhitespace(c byte) bool {
return c == ' ' || c == '\t' || c == '\n' || c == '\r'
}
// improvedHtmlPreservingTokenize is a zero-allocation version of the HTML preserving tokenizer
func (p *Parser) improvedHtmlPreservingTokenize() ([]Token, error) {
// Estimate token count based on source length
estimatedTokens := len(p.source) / 20 // Rough estimate
tokens := GetImprovedTokenSlice(estimatedTokens)
defer tokens.Release()
var currentPosition int
line := 1
// Reusable buffers to avoid allocations
tagPatterns := [5]string{"{{-", "{{", "{%-", "{%", "{#"}
tagTypes := [5]int{TOKEN_VAR_START_TRIM, TOKEN_VAR_START, TOKEN_BLOCK_START_TRIM, TOKEN_BLOCK_START, TOKEN_COMMENT_START}
tagLengths := [5]int{3, 2, 3, 2, 2}
for currentPosition < len(p.source) {
// Find the next tag
nextTagPos := -1
tagType := -1
tagLength := 0
// Check for all possible tag patterns
for i := 0; i < 5; i++ {
pos := strings.Index(p.source[currentPosition:], tagPatterns[i])
if pos != -1 {
// Adjust position relative to current position
pos += currentPosition
// If this is the first tag found or it's closer than previous ones
if nextTagPos == -1 || pos < nextTagPos {
nextTagPos = pos
tagType = tagTypes[i]
tagLength = tagLengths[i]
}
}
}
// Check if the tag is escaped
if nextTagPos != -1 && nextTagPos > 0 && p.source[nextTagPos-1] == '\\' {
// Add text up to the backslash
if nextTagPos-1 > currentPosition {
preText := p.source[currentPosition:nextTagPos-1]
tokens.AppendToken(TOKEN_TEXT, preText, line)
line += countNewlines(preText)
}
// Add the tag as literal text (without the backslash)
// Find which pattern was matched
for i := 0; i < 5; i++ {
if tagType == tagTypes[i] {
tokens.AppendToken(TOKEN_TEXT, tagPatterns[i], line)
break
}
}
// Move past this tag
currentPosition = nextTagPos + tagLength
continue
}
// No more tags found - add the rest as TEXT
if nextTagPos == -1 {
remainingText := p.source[currentPosition:]
if len(remainingText) > 0 {
tokens.AppendToken(TOKEN_TEXT, remainingText, line)
line += countNewlines(remainingText)
}
break
}
// Add text before the tag
if nextTagPos > currentPosition {
textContent := p.source[currentPosition:nextTagPos]
tokens.AppendToken(TOKEN_TEXT, textContent, line)
line += countNewlines(textContent)
}
// Add the tag start token
tokens.AppendToken(tagType, "", line)
// Move past opening tag
currentPosition = nextTagPos + tagLength
// Find matching end tag
var endTag string
var endTagType int
var endTagLength int
if tagType == TOKEN_VAR_START || tagType == TOKEN_VAR_START_TRIM {
// Look for "}}" or "-}}"
endPos1 := strings.Index(p.source[currentPosition:], "}}")
endPos2 := strings.Index(p.source[currentPosition:], "-}}")
if endPos1 != -1 && (endPos2 == -1 || endPos1 < endPos2) {
endTag = "}}"
endTagType = TOKEN_VAR_END
endTagLength = 2
} else if endPos2 != -1 {
endTag = "-}}"
endTagType = TOKEN_VAR_END_TRIM
endTagLength = 3
} else {
return nil, fmt.Errorf("unclosed variable tag at line %d", line)
}
} else if tagType == TOKEN_BLOCK_START || tagType == TOKEN_BLOCK_START_TRIM {
// Look for "%}" or "-%}"
endPos1 := strings.Index(p.source[currentPosition:], "%}")
endPos2 := strings.Index(p.source[currentPosition:], "-%}")
if endPos1 != -1 && (endPos2 == -1 || endPos1 < endPos2) {
endTag = "%}"
endTagType = TOKEN_BLOCK_END
endTagLength = 2
} else if endPos2 != -1 {
endTag = "-%}"
endTagType = TOKEN_BLOCK_END_TRIM
endTagLength = 3
} else {
return nil, fmt.Errorf("unclosed block tag at line %d", line)
}
} else if tagType == TOKEN_COMMENT_START {
// Look for "#}"
endPos := strings.Index(p.source[currentPosition:], "#}")
if endPos == -1 {
return nil, fmt.Errorf("unclosed comment at line %d", line)
}
endTag = "#}"
endTagType = TOKEN_COMMENT_END
endTagLength = 2
}
// Find position of the end tag
endPos := strings.Index(p.source[currentPosition:], endTag)
if endPos == -1 {
return nil, fmt.Errorf("unclosed tag at line %d", line)
}
// Get content between tags
tagContent := p.source[currentPosition:currentPosition+endPos]
line += countNewlines(tagContent)
// Process tag content based on type
if tagType == TOKEN_COMMENT_START {
// Store comments as TEXT tokens
if len(tagContent) > 0 {
tokens.AppendToken(TOKEN_TEXT, tagContent, line)
}
} else {
// For variable and block tags, tokenize the content
tagContent = strings.TrimSpace(tagContent)
if tagType == TOKEN_BLOCK_START || tagType == TOKEN_BLOCK_START_TRIM {
// Process block tags with optimized tokenization
processBlockTag(tagContent, tokens, line, p)
} else {
// Process variable tags with optimized tokenization
if len(tagContent) > 0 {
if !strings.ContainsAny(tagContent, ".|[](){}\"',+-*/=!<>%&^~") {
// Simple variable name
tokens.AppendToken(TOKEN_NAME, tagContent, line)
} else {
// Complex expression
expressionTokens := GetImprovedTokenSlice(len(tagContent) / 4)
p.optimizedTokenizeExpressionImproved(tagContent, expressionTokens, line)
// Copy tokens
for _, token := range expressionTokens.tokens {
tokens.AppendToken(token.Type, token.Value, token.Line)
}
expressionTokens.Release()
}
}
}
}
// Add the end tag token
tokens.AppendToken(endTagType, "", line)
// Move past the end tag
currentPosition = currentPosition + endPos + endTagLength
}
// Add EOF token
tokens.AppendToken(TOKEN_EOF, "", line)
return tokens.Finalize(), nil
}
// Helper function to process block tags
func processBlockTag(content string, tokens *ImprovedTokenSlice, line int, p *Parser) {
// Extract the tag name
parts := strings.SplitN(content, " ", 2)
if len(parts) > 0 {
blockName := parts[0]
tokens.AppendToken(TOKEN_NAME, blockName, line)
// Process rest of the block content
if len(parts) > 1 {
blockContent := strings.TrimSpace(parts[1])
switch blockName {
case "if", "elseif":
// For conditional blocks, tokenize expression
exprTokens := GetImprovedTokenSlice(len(blockContent) / 4)
p.optimizedTokenizeExpressionImproved(blockContent, exprTokens, line)
// Copy tokens
for _, token := range exprTokens.tokens {
tokens.AppendToken(token.Type, token.Value, token.Line)
}
exprTokens.Release()
case "for":
// Process for loop with iterator(s) and collection
inPos := strings.Index(strings.ToLower(blockContent), " in ")
if inPos != -1 {
iterators := strings.TrimSpace(blockContent[:inPos])
collection := strings.TrimSpace(blockContent[inPos+4:])
// Handle key, value iterator syntax
if strings.Contains(iterators, ",") {
iterParts := strings.SplitN(iterators, ",", 2)
if len(iterParts) == 2 {
tokens.AppendToken(TOKEN_NAME, strings.TrimSpace(iterParts[0]), line)
tokens.AppendToken(TOKEN_PUNCTUATION, ",", line)
tokens.AppendToken(TOKEN_NAME, strings.TrimSpace(iterParts[1]), line)
}
} else {
// Single iterator
tokens.AppendToken(TOKEN_NAME, iterators, line)
}
// Add 'in' keyword
tokens.AppendToken(TOKEN_NAME, "in", line)
// Process collection expression
collectionTokens := GetImprovedTokenSlice(len(collection) / 4)
p.optimizedTokenizeExpressionImproved(collection, collectionTokens, line)
// Copy tokens
for _, token := range collectionTokens.tokens {
tokens.AppendToken(token.Type, token.Value, token.Line)
}
collectionTokens.Release()
} else {
// Fallback for malformed for loops
tokens.AppendToken(TOKEN_NAME, blockContent, line)
}
case "set":
// Handle variable assignment
assignPos := strings.Index(blockContent, "=")
if assignPos != -1 {
varName := strings.TrimSpace(blockContent[:assignPos])
value := strings.TrimSpace(blockContent[assignPos+1:])
tokens.AppendToken(TOKEN_NAME, varName, line)
tokens.AppendToken(TOKEN_OPERATOR, "=", line)
// Tokenize value expression
valueTokens := GetImprovedTokenSlice(len(value) / 4)
p.optimizedTokenizeExpressionImproved(value, valueTokens, line)
// Copy tokens
for _, token := range valueTokens.tokens {
tokens.AppendToken(token.Type, token.Value, token.Line)
}
valueTokens.Release()
} else {
// Simple set without assignment
tokens.AppendToken(TOKEN_NAME, blockContent, line)
}
default:
// Other block types
tokens.AppendToken(TOKEN_NAME, blockContent, line)
}
}
}
}

165
token_pool_optimization.go Normal file
View file

@ -0,0 +1,165 @@
package twig
import (
"sync"
)
// This file implements optimized token handling functions to reduce allocations
// during the tokenization process.
// PooledToken represents a token from the token pool
// We use a separate struct to avoid accidentally returning the same instance
type PooledToken struct {
token *Token // Reference to the token from the pool
}
// PooledTokenSlice is a slice of tokens with a reference to the original pooled slice
type PooledTokenSlice struct {
tokens []Token // The token slice
poolRef *[]Token // Reference to the original slice from the pool
used bool // Whether this slice has been used
tmpPool sync.Pool // Pool for temporary token objects
scratch []*Token // Scratch space for temporary tokens
}
// GetPooledTokenSlice gets a token slice from the pool with the given capacity hint
func GetPooledTokenSlice(capacityHint int) *PooledTokenSlice {
slice := &PooledTokenSlice{
tmpPool: sync.Pool{
New: func() interface{} {
return &Token{}
},
},
scratch: make([]*Token, 0, 16), // Pre-allocate scratch space
used: false,
}
// Get a token slice from the pool
pooledSlice := GetTokenSlice(capacityHint)
slice.tokens = pooledSlice
slice.poolRef = &pooledSlice
return slice
}
// AppendToken adds a token to the slice using pooled tokens
func (s *PooledTokenSlice) AppendToken(tokenType int, value string, line int) {
if s.used {
// This slice has already been finalized, can't append anymore
return
}
// Get a token from the pool
token := s.tmpPool.Get().(*Token)
token.Type = tokenType
token.Value = value
token.Line = line
// Keep a reference to this token so we can clean it up later
s.scratch = append(s.scratch, token)
// Add a copy of the token to the slice
s.tokens = append(s.tokens, *token)
}
// Finalize returns the token slice and cleans up temporary tokens
func (s *PooledTokenSlice) Finalize() []Token {
if s.used {
// Already finalized
return s.tokens
}
// Mark as used so we don't accidentally use it again
s.used = true
// Clean up temporary tokens
for _, token := range s.scratch {
token.Value = ""
s.tmpPool.Put(token)
}
// Clear scratch slice but keep capacity
s.scratch = s.scratch[:0]
return s.tokens
}
// Release returns the token slice to the pool
func (s *PooledTokenSlice) Release() {
if s.poolRef != nil {
ReleaseTokenSlice(*s.poolRef)
s.poolRef = nil
}
// Clean up any remaining temporary tokens
for _, token := range s.scratch {
token.Value = ""
s.tmpPool.Put(token)
}
// Clear references
s.scratch = nil
s.tokens = nil
s.used = true
}
// getPooledToken gets a token from the pool (for internal use)
func getPooledToken() *Token {
return TokenPool.Get().(*Token)
}
// releasePooledToken returns a token to the pool (for internal use)
func releasePooledToken(token *Token) {
if token == nil {
return
}
token.Value = ""
TokenPool.Put(token)
}
// TOKEN SLICES - additional optimization for token slice reuse
// TokenNodePool provides a pool for pre-sized token node arrays
var TokenNodePool = sync.Pool{
New: func() interface{} {
// Default capacity that covers most cases
slice := make([]Node, 0, 32)
return &slice
},
}
// GetTokenNodeSlice gets a slice of Node from the pool
func GetTokenNodeSlice(capacityHint int) *[]Node {
slice := TokenNodePool.Get().(*[]Node)
// If the capacity is too small, allocate a new slice
if cap(*slice) < capacityHint {
*slice = make([]Node, 0, capacityHint)
} else {
// Otherwise, clear the slice but keep capacity
*slice = (*slice)[:0]
}
return slice
}
// ReleaseTokenNodeSlice returns a slice of Node to the pool
func ReleaseTokenNodeSlice(slice *[]Node) {
if slice == nil {
return
}
// Only pool reasonably sized slices
if cap(*slice) > 1000 || cap(*slice) < 32 {
return
}
// Clear references to help GC
for i := range *slice {
(*slice)[i] = nil
}
// Clear slice but keep capacity
*slice = (*slice)[:0]
TokenNodePool.Put(slice)
}

18
tokenizer.go
View file

@ -8,29 +8,29 @@ func processWhitespaceControl(tokens []Token) []Token {
return tokens
}
var result []Token = make([]Token, len(tokens))
copy(result, tokens)
// Modify tokens in-place to avoid allocation
// This works because we're only changing token values, not adding/removing tokens
// Process each token to apply whitespace trimming
for i := 0; i < len(result); i++ {
token := result[i]
for i := 0; i < len(tokens); i++ {
token := tokens[i]
// Handle opening tags that trim whitespace before them
if token.Type == TOKEN_VAR_START_TRIM || token.Type == TOKEN_BLOCK_START_TRIM {
// If there's a text token before this, trim its trailing whitespace
if i > 0 && result[i-1].Type == TOKEN_TEXT {
result[i-1].Value = trimTrailingWhitespace(result[i-1].Value)
if i > 0 && tokens[i-1].Type == TOKEN_TEXT {
tokens[i-1].Value = trimTrailingWhitespace(tokens[i-1].Value)
}
}
// Handle closing tags that trim whitespace after them
if token.Type == TOKEN_VAR_END_TRIM || token.Type == TOKEN_BLOCK_END_TRIM {
// If there's a text token after this, trim its leading whitespace
if i+1 < len(result) && result[i+1].Type == TOKEN_TEXT {
result[i+1].Value = trimLeadingWhitespace(result[i+1].Value)
if i+1 < len(tokens) && tokens[i+1].Type == TOKEN_TEXT {
tokens[i+1].Value = trimLeadingWhitespace(tokens[i+1].Value)
}
}
}
return result
return tokens
}

333
tokenizer_benchmark_test.go Normal file
View file

@ -0,0 +1,333 @@
package twig
import (
"testing"
)
func BenchmarkHtmlPreservingTokenize(b *testing.B) {
// A sample template with HTML and Twig tags
source := `<!DOCTYPE html>
<html>
<head>
<title>{{ title }}</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="{{ asset_url('styles.css') }}">
</head>
<body>
<header>
<h1>{{ page.title }}</h1>
<nav>
<ul>
{% for item in menu %}
<li><a href="{{ item.url }}">{{ item.label }}</a></li>
{% endfor %}
</ul>
</nav>
</header>
<main>
{% if content %}
<article>
{{ content|raw }}
</article>
{% else %}
<p>No content available.</p>
{% endif %}
{% block sidebar %}
<aside>
{% include "sidebar.twig" with {items: sidebar_items} %}
</aside>
{% endblock %}
</main>
<footer>
<p>&copy; {{ "now"|date("Y") }} {{ site_name }}</p>
</footer>
</body>
</html>`
parser := &Parser{source: source}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = parser.htmlPreservingTokenize()
}
}
func BenchmarkOptimizedHtmlPreservingTokenize(b *testing.B) {
// Sample template
source := `<!DOCTYPE html>
<html>
<head>
<title>{{ title }}</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="{{ asset_url('styles.css') }}">
</head>
<body>
<header>
<h1>{{ page.title }}</h1>
<nav>
<ul>
{% for item in menu %}
<li><a href="{{ item.url }}">{{ item.label }}</a></li>
{% endfor %}
</ul>
</nav>
</header>
<main>
{% if content %}
<article>
{{ content|raw }}
</article>
{% else %}
<p>No content available.</p>
{% endif %}
{% block sidebar %}
<aside>
{% include "sidebar.twig" with {items: sidebar_items} %}
</aside>
{% endblock %}
</main>
<footer>
<p>&copy; {{ "now"|date("Y") }} {{ site_name }}</p>
</footer>
</body>
</html>`
parser := &Parser{source: source}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = parser.optimizedHtmlPreservingTokenize()
}
}
func BenchmarkImprovedHtmlPreservingTokenize(b *testing.B) {
// Sample template (same as above)
source := `<!DOCTYPE html>
<html>
<head>
<title>{{ title }}</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="{{ asset_url('styles.css') }}">
</head>
<body>
<header>
<h1>{{ page.title }}</h1>
<nav>
<ul>
{% for item in menu %}
<li><a href="{{ item.url }}">{{ item.label }}</a></li>
{% endfor %}
</ul>
</nav>
</header>
<main>
{% if content %}
<article>
{{ content|raw }}
</article>
{% else %}
<p>No content available.</p>
{% endif %}
{% block sidebar %}
<aside>
{% include "sidebar.twig" with {items: sidebar_items} %}
</aside>
{% endblock %}
</main>
<footer>
<p>&copy; {{ "now"|date("Y") }} {{ site_name }}</p>
</footer>
</body>
</html>`
parser := &Parser{source: source}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = parser.improvedHtmlPreservingTokenize()
}
}
func BenchmarkZeroAllocHtmlTokenize(b *testing.B) {
// Same sample template used in other benchmarks
source := `<!DOCTYPE html>
<html>
<head>
<title>{{ title }}</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="{{ asset_url('styles.css') }}">
</head>
<body>
<header>
<h1>{{ page.title }}</h1>
<nav>
<ul>
{% for item in menu %}
<li><a href="{{ item.url }}">{{ item.label }}</a></li>
{% endfor %}
</ul>
</nav>
</header>
<main>
{% if content %}
<article>
{{ content|raw }}
</article>
{% else %}
<p>No content available.</p>
{% endif %}
{% block sidebar %}
<aside>
{% include "sidebar.twig" with {items: sidebar_items} %}
</aside>
{% endblock %}
</main>
<footer>
<p>&copy; {{ "now"|date("Y") }} {{ site_name }}</p>
</footer>
</body>
</html>`
b.ResetTimer()
for i := 0; i < b.N; i++ {
tokenizer := GetTokenizer(source, 0)
_, _ = tokenizer.TokenizeHtmlPreserving()
ReleaseTokenizer(tokenizer)
}
}
func BenchmarkTokenizeExpression(b *testing.B) {
source := `user.name ~ " is " ~ user.age ~ " years old and lives in " ~ user.address.city`
parser := &Parser{source: source}
tokens := make([]Token, 0, 30)
b.ResetTimer()
for i := 0; i < b.N; i++ {
tokens = tokens[:0]
parser.tokenizeExpression(source, &tokens, 1)
}
}
func BenchmarkOptimizedTokenizeExpression(b *testing.B) {
source := `user.name ~ " is " ~ user.age ~ " years old and lives in " ~ user.address.city`
parser := &Parser{source: source}
b.ResetTimer()
for i := 0; i < b.N; i++ {
tokenSlice := GetPooledTokenSlice(30)
parser.optimizedTokenizeExpression(source, tokenSlice, 1)
tokenSlice.Release()
}
}
func BenchmarkImprovedTokenizeExpression(b *testing.B) {
source := `user.name ~ " is " ~ user.age ~ " years old and lives in " ~ user.address.city`
parser := &Parser{source: source}
b.ResetTimer()
for i := 0; i < b.N; i++ {
tokenSlice := GetImprovedTokenSlice(30)
parser.optimizedTokenizeExpressionImproved(source, tokenSlice, 1)
tokenSlice.Release()
}
}
func BenchmarkZeroAllocTokenize(b *testing.B) {
source := `user.name ~ " is " ~ user.age ~ " years old and lives in " ~ user.address.city`
b.ResetTimer()
for i := 0; i < b.N; i++ {
tokenizer := GetTokenizer(source, 30)
tokenizer.TokenizeExpression(source)
ReleaseTokenizer(tokenizer)
}
}
func BenchmarkComplexTokenize(b *testing.B) {
// A more complex example with nested structures
source := `{% for user in users %}
{% if user.active %}
<div class="user {{ user.role }}">
<h2>{{ user.name|title }}</h2>
<p>{{ user.bio|striptags|truncate(100) }}</p>
{% if user.permissions is defined and 'admin' in user.permissions %}
<span class="admin-badge">Admin</span>
{% endif %}
<ul class="contact-info">
{% for method, value in user.contacts %}
<li class="{{ method }}">{{ value }}</li>
{% endfor %}
</ul>
{% set stats = user.getStatistics() %}
<div class="stats">
<span>Posts: {{ stats.posts }}</span>
<span>Comments: {{ stats.comments }}</span>
<span>Last active: {{ stats.lastActive|date("d M Y") }}</span>
</div>
</div>
{% else %}
<!-- User {{ user.name }} is inactive -->
{% endif %}
{% endfor %}`
parser := &Parser{source: source}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = parser.optimizedHtmlPreservingTokenize()
}
}
func BenchmarkTokenizeComplexObject(b *testing.B) {
// A complex object with nested structures
source := `{
name: "John Doe",
age: 30,
address: {
street: "123 Main St",
city: "New York",
country: "USA"
},
preferences: {
theme: "dark",
notifications: true,
privacy: {
showEmail: false,
showPhone: true
}
},
contacts: ["john@example.com", "+1234567890"],
scores: [95, 87, 92, 78],
metadata: {
created: "2023-01-15",
modified: "2023-06-22",
tags: ["user", "premium", "verified"]
}
}`
b.ResetTimer()
for i := 0; i < b.N; i++ {
tokenSlice := GetPooledTokenSlice(100)
optimizedTokenizeComplexObject(source, tokenSlice, 1)
tokenSlice.Release()
}
}

12
utility.go
View file

@ -6,6 +6,18 @@ import (
"sync"
)
// countNewlines counts newlines in a string without allocations.
// This is a zero-allocation replacement for strings.Count(s, "\n")
func countNewlines(s string) int {
count := 0
for i := 0; i < len(s); i++ {
if s[i] == '\n' {
count++
}
}
return count
}
// byteBufferPool is used to reuse byte buffers during node rendering
var byteBufferPool = sync.Pool{
New: func() interface{} {

878
zero_alloc_tokenizer.go Normal file
View file

@ -0,0 +1,878 @@
package twig
import (
"fmt"
"strings"
"sync"
"unsafe"
)
// ZeroAllocTokenizer is an allocation-free tokenizer
// It uses a pre-allocated token buffer for all token operations
type ZeroAllocTokenizer struct {
tokenBuffer []Token // Pre-allocated buffer of tokens
source string // Source string being tokenized
position int // Current position in source
line int // Current line
result []Token // Slice of actually used tokens
tempStrings []string // String constants that we can reuse
}
// This array contains commonly used strings in tokenization to avoid allocations
var commonStrings = []string{
// Common twig words and operators
"if", "else", "elseif", "endif", "for", "endfor", "in",
"block", "endblock", "extends", "include", "with", "set",
"macro", "endmacro", "import", "from", "as", "do",
// Common operators
"+", "-", "*", "/", "=", "==", "!=", ">", "<", ">=", "<=",
"and", "or", "not", "~", "%", "?", ":", "??",
// Common punctuation
"(", ")", "[", "]", "{", "}", ".", ",", "|", ";",
// Common literals
"true", "false", "null",
// Empty string
"",
}
// TokenizerPooled holds a set of resources for zero-allocation tokenization
type TokenizerPooled struct {
tokenizer ZeroAllocTokenizer
used bool
}
// TokenizerPool is a pool of tokenizer resources
var tokenizerPool = sync.Pool{
New: func() interface{} {
// Create a pre-allocated tokenizer with reasonable defaults
return &TokenizerPooled{
tokenizer: ZeroAllocTokenizer{
tokenBuffer: make([]Token, 0, 256), // Buffer for tokens
tempStrings: append([]string{}, commonStrings...),
result: nil,
},
used: false,
}
},
}
// GetTokenizer gets a tokenizer from the pool
func GetTokenizer(source string, capacityHint int) *ZeroAllocTokenizer {
pooled := tokenizerPool.Get().(*TokenizerPooled)
// Reset the tokenizer
tokenizer := &pooled.tokenizer
tokenizer.source = source
tokenizer.position = 0
tokenizer.line = 1
// Ensure token buffer has enough capacity
neededCapacity := capacityHint
if neededCapacity <= 0 {
// Estimate capacity based on source length
neededCapacity = len(source) / 10
if neededCapacity < 32 {
neededCapacity = 32
}
}
// Resize token buffer if needed
if cap(tokenizer.tokenBuffer) < neededCapacity {
tokenizer.tokenBuffer = make([]Token, 0, neededCapacity)
} else {
tokenizer.tokenBuffer = tokenizer.tokenBuffer[:0]
}
// Reset result
tokenizer.result = nil
// Mark as used
pooled.used = true
return tokenizer
}
// ReleaseTokenizer returns a tokenizer to the pool
func ReleaseTokenizer(tokenizer *ZeroAllocTokenizer) {
// Get the parent pooled struct
pooled := (*TokenizerPooled)(unsafe.Pointer(
uintptr(unsafe.Pointer(tokenizer)) - unsafe.Offsetof(TokenizerPooled{}.tokenizer)))
// Only return to pool if it's used
if pooled.used {
// Mark as not used and clear references that might prevent GC
pooled.used = false
tokenizer.source = ""
tokenizer.result = nil
// Return to pool
tokenizerPool.Put(pooled)
}
}
// AddToken adds a token to the buffer
func (t *ZeroAllocTokenizer) AddToken(tokenType int, value string, line int) {
// Create a token
var token Token
token.Type = tokenType
token.Value = value
token.Line = line
// Add to buffer
t.tokenBuffer = append(t.tokenBuffer, token)
}
// GetStringConstant checks if a string exists in our constants and returns
// the canonical version to avoid allocation
func (t *ZeroAllocTokenizer) GetStringConstant(s string) string {
// First check common strings
for _, constant := range t.tempStrings {
if constant == s {
return constant
}
}
// Add to temp strings if it's a short string that might be reused
if len(s) <= 20 {
t.tempStrings = append(t.tempStrings, s)
}
return s
}
// TokenizeExpression tokenizes an expression string with zero allocations
func (t *ZeroAllocTokenizer) TokenizeExpression(expr string) []Token {
// Save current position and set new source context
savedSource := t.source
savedPosition := t.position
savedLine := t.line
t.source = expr
t.position = 0
startTokenCount := len(t.tokenBuffer)
var inString bool
var stringDelimiter byte
var stringStart int
for t.position < len(t.source) {
c := t.source[t.position]
// Handle string literals
if (c == '"' || c == '\'') && (t.position == 0 || t.source[t.position-1] != '\\') {
if inString && c == stringDelimiter {
// End of string, add the string token
value := t.source[stringStart:t.position]
t.AddToken(TOKEN_STRING, value, t.line)
inString = false
} else if !inString {
// Start of string
inString = true
stringDelimiter = c
stringStart = t.position + 1
}
t.position++
continue
}
// Skip chars inside strings
if inString {
t.position++
continue
}
// Handle operators (includes multi-char operators like ==, !=, etc.)
if isOperator(c) {
op := string(c)
t.position++
// Check for two-character operators
if t.position < len(t.source) {
nextChar := t.source[t.position]
twoCharOp := string([]byte{c, nextChar})
// Check common two-char operators
if (c == '=' && nextChar == '=') ||
(c == '!' && nextChar == '=') ||
(c == '>' && nextChar == '=') ||
(c == '<' && nextChar == '=') ||
(c == '&' && nextChar == '&') ||
(c == '|' && nextChar == '|') ||
(c == '?' && nextChar == '?') {
op = twoCharOp
t.position++
}
}
// Use constant version of the operator string if possible
op = t.GetStringConstant(op)
t.AddToken(TOKEN_OPERATOR, op, t.line)
continue
}
// Handle punctuation
if isPunctuation(c) {
// Use constant version of punctuation
punct := t.GetStringConstant(string(c))
t.AddToken(TOKEN_PUNCTUATION, punct, t.line)
t.position++
continue
}
// Skip whitespace
if isWhitespace(c) {
t.position++
if c == '\n' {
t.line++
}
continue
}
// Handle identifiers, literals, etc.
if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '_' {
// Start of an identifier
start := t.position
// Find the end
t.position++
for t.position < len(t.source) &&
((t.source[t.position] >= 'a' && t.source[t.position] <= 'z') ||
(t.source[t.position] >= 'A' && t.source[t.position] <= 'Z') ||
(t.source[t.position] >= '0' && t.source[t.position] <= '9') ||
t.source[t.position] == '_') {
t.position++
}
// Extract the identifier
identifier := t.source[start:t.position]
// Try to use a canonical string
identifier = t.GetStringConstant(identifier)
// Keywords/literals get special token types
if identifier == "true" || identifier == "false" || identifier == "null" {
t.AddToken(TOKEN_NAME, identifier, t.line)
} else {
t.AddToken(TOKEN_NAME, identifier, t.line)
}
continue
}
// Handle numbers
if (c >= '0' && c <= '9') || (c == '-' && t.position+1 < len(t.source) && t.source[t.position+1] >= '0' && t.source[t.position+1] <= '9') {
start := t.position
// Skip the negative sign if present
if c == '-' {
t.position++
}
// Consume digits
for t.position < len(t.source) && t.source[t.position] >= '0' && t.source[t.position] <= '9' {
t.position++
}
// Handle decimal point
if t.position < len(t.source) && t.source[t.position] == '.' {
t.position++
// Consume fractional digits
for t.position < len(t.source) && t.source[t.position] >= '0' && t.source[t.position] <= '9' {
t.position++
}
}
// Add the number token
t.AddToken(TOKEN_NUMBER, t.source[start:t.position], t.line)
continue
}
// Unrecognized character
t.position++
}
// Create slice of tokens
tokens := t.tokenBuffer[startTokenCount:]
// Restore original context
t.source = savedSource
t.position = savedPosition
t.line = savedLine
return tokens
}
// TokenizeHtmlPreserving performs full tokenization of a template with HTML preservation
func (t *ZeroAllocTokenizer) TokenizeHtmlPreserving() ([]Token, error) {
// Reset position and line
t.position = 0
t.line = 1
// Clear token buffer
t.tokenBuffer = t.tokenBuffer[:0]
tagPatterns := [5]string{"{{-", "{{", "{%-", "{%", "{#"}
tagTypes := [5]int{TOKEN_VAR_START_TRIM, TOKEN_VAR_START, TOKEN_BLOCK_START_TRIM, TOKEN_BLOCK_START, TOKEN_COMMENT_START}
tagLengths := [5]int{3, 2, 3, 2, 2}
for t.position < len(t.source) {
// Find the next tag
nextTagPos := -1
tagType := -1
tagLength := 0
// Check for all possible tag patterns
// This loop avoids allocations by manually checking prefixes
remainingSource := t.source[t.position:]
for i := 0; i < 5; i++ {
pattern := tagPatterns[i]
if len(remainingSource) >= len(pattern) &&
remainingSource[:len(pattern)] == pattern {
// Tag found at current position
nextTagPos = t.position
tagType = tagTypes[i]
tagLength = tagLengths[i]
break
}
// If not found at current position, find it in the remainder
patternPos := strings.Index(remainingSource, pattern)
if patternPos != -1 {
pos := t.position + patternPos
if nextTagPos == -1 || pos < nextTagPos {
nextTagPos = pos
tagType = tagTypes[i]
tagLength = tagLengths[i]
}
}
}
// Check if the tag is escaped
if nextTagPos != -1 && nextTagPos > 0 && t.source[nextTagPos-1] == '\\' {
// Add text up to the backslash
if nextTagPos-1 > t.position {
preText := t.source[t.position:nextTagPos-1]
t.AddToken(TOKEN_TEXT, preText, t.line)
t.line += countNewlines(preText)
}
// Add the tag as literal text (without the backslash)
// Find which pattern was matched
for i := 0; i < 5; i++ {
if tagType == tagTypes[i] {
t.AddToken(TOKEN_TEXT, tagPatterns[i], t.line)
break
}
}
// Move past this tag
t.position = nextTagPos + tagLength
continue
}
// No more tags found - add the rest as TEXT
if nextTagPos == -1 {
if t.position < len(t.source) {
remainingText := t.source[t.position:]
t.AddToken(TOKEN_TEXT, remainingText, t.line)
t.line += countNewlines(remainingText)
}
break
}
// Add text before the tag
if nextTagPos > t.position {
textContent := t.source[t.position:nextTagPos]
t.AddToken(TOKEN_TEXT, textContent, t.line)
t.line += countNewlines(textContent)
}
// Add the tag start token
t.AddToken(tagType, "", t.line)
// Move past opening tag
t.position = nextTagPos + tagLength
// Find matching end tag
var endTag string
var endTagType int
var endTagLength int
if tagType == TOKEN_VAR_START || tagType == TOKEN_VAR_START_TRIM {
// Look for "}}" or "-}}"
endPos1 := strings.Index(t.source[t.position:], "}}")
endPos2 := strings.Index(t.source[t.position:], "-}}")
if endPos1 != -1 && (endPos2 == -1 || endPos1 < endPos2) {
endTag = "}}"
endTagType = TOKEN_VAR_END
endTagLength = 2
} else if endPos2 != -1 {
endTag = "-}}"
endTagType = TOKEN_VAR_END_TRIM
endTagLength = 3
} else {
return nil, fmt.Errorf("unclosed variable tag at line %d", t.line)
}
} else if tagType == TOKEN_BLOCK_START || tagType == TOKEN_BLOCK_START_TRIM {
// Look for "%}" or "-%}"
endPos1 := strings.Index(t.source[t.position:], "%}")
endPos2 := strings.Index(t.source[t.position:], "-%}")
if endPos1 != -1 && (endPos2 == -1 || endPos1 < endPos2) {
endTag = "%}"
endTagType = TOKEN_BLOCK_END
endTagLength = 2
} else if endPos2 != -1 {
endTag = "-%}"
endTagType = TOKEN_BLOCK_END_TRIM
endTagLength = 3
} else {
return nil, fmt.Errorf("unclosed block tag at line %d", t.line)
}
} else if tagType == TOKEN_COMMENT_START {
// Look for "#}"
endPos := strings.Index(t.source[t.position:], "#}")
if endPos == -1 {
return nil, fmt.Errorf("unclosed comment at line %d", t.line)
}
endTag = "#}"
endTagType = TOKEN_COMMENT_END
endTagLength = 2
}
// Find position of the end tag
endPos := strings.Index(t.source[t.position:], endTag)
if endPos == -1 {
return nil, fmt.Errorf("unclosed tag at line %d", t.line)
}
// Get content between tags
tagContent := t.source[t.position:t.position+endPos]
t.line += countNewlines(tagContent)
// Process tag content based on type
if tagType == TOKEN_COMMENT_START {
// Store comments as TEXT tokens
if len(tagContent) > 0 {
t.AddToken(TOKEN_TEXT, tagContent, t.line)
}
} else {
// For variable and block tags, tokenize the content
tagContent = strings.TrimSpace(tagContent)
if tagType == TOKEN_BLOCK_START || tagType == TOKEN_BLOCK_START_TRIM {
// Process block tags with specialized tokenization
t.processBlockTag(tagContent)
} else {
// Process variable tags with optimized tokenization
if len(tagContent) > 0 {
if !strings.ContainsAny(tagContent, ".|[](){}\"',+-*/=!<>%&^~") {
// Simple variable name
identifier := t.GetStringConstant(tagContent)
t.AddToken(TOKEN_NAME, identifier, t.line)
} else {
// Complex expression
t.TokenizeExpression(tagContent)
}
}
}
}
// Add the end tag token
t.AddToken(endTagType, "", t.line)
// Move past the end tag
t.position = t.position + endPos + endTagLength
}
// Add EOF token
t.AddToken(TOKEN_EOF, "", t.line)
// Save the token buffer to result
t.result = t.tokenBuffer
return t.result, nil
}
// processBlockTag handles specialized block tag tokenization
func (t *ZeroAllocTokenizer) processBlockTag(content string) {
// Extract the tag name
spacePos := strings.IndexByte(content, ' ')
var blockName string
var blockContent string
if spacePos == -1 {
// No space found, the whole content is the tag name
blockName = content
blockContent = ""
} else {
blockName = content[:spacePos]
blockContent = strings.TrimSpace(content[spacePos+1:])
}
// Use canonical string for block name
blockName = t.GetStringConstant(blockName)
t.AddToken(TOKEN_NAME, blockName, t.line)
// If there's no content, we're done
if blockContent == "" {
return
}
// Process based on block type
switch blockName {
case "if", "elseif":
// For conditional blocks, tokenize expression
t.TokenizeExpression(blockContent)
case "for":
// Process for loop with iterator(s) and collection
inPos := strings.Index(strings.ToLower(blockContent), " in ")
if inPos != -1 {
iterators := strings.TrimSpace(blockContent[:inPos])
collection := strings.TrimSpace(blockContent[inPos+4:])
// Handle key, value iterator syntax
if strings.Contains(iterators, ",") {
iterParts := strings.SplitN(iterators, ",", 2)
if len(iterParts) == 2 {
// Process iterator variables
keyVar := t.GetStringConstant(strings.TrimSpace(iterParts[0]))
valueVar := t.GetStringConstant(strings.TrimSpace(iterParts[1]))
t.AddToken(TOKEN_NAME, keyVar, t.line)
t.AddToken(TOKEN_PUNCTUATION, ",", t.line)
t.AddToken(TOKEN_NAME, valueVar, t.line)
}
} else {
// Single iterator
iterator := t.GetStringConstant(iterators)
t.AddToken(TOKEN_NAME, iterator, t.line)
}
// Add 'in' keyword
t.AddToken(TOKEN_NAME, "in", t.line)
// Process collection expression
t.TokenizeExpression(collection)
} else {
// Fallback for malformed for loops
t.AddToken(TOKEN_NAME, blockContent, t.line)
}
case "set":
// Handle variable assignment
assignPos := strings.Index(blockContent, "=")
if assignPos != -1 {
varName := strings.TrimSpace(blockContent[:assignPos])
value := strings.TrimSpace(blockContent[assignPos+1:])
// Add the variable name token
varName = t.GetStringConstant(varName)
t.AddToken(TOKEN_NAME, varName, t.line)
// Add the assignment operator
t.AddToken(TOKEN_OPERATOR, "=", t.line)
// Tokenize the value expression
t.TokenizeExpression(value)
} else {
// Simple set without assignment
blockContent = t.GetStringConstant(blockContent)
t.AddToken(TOKEN_NAME, blockContent, t.line)
}
case "do":
// Handle variable assignment similar to set tag
assignPos := strings.Index(blockContent, "=")
if assignPos != -1 {
varName := strings.TrimSpace(blockContent[:assignPos])
value := strings.TrimSpace(blockContent[assignPos+1:])
// Check if varName is valid (should be a variable name)
// In Twig, variable names must start with a letter or underscore
if len(varName) > 0 && (isCharAlpha(varName[0]) || varName[0] == '_') {
// Add the variable name token
varName = t.GetStringConstant(varName)
t.AddToken(TOKEN_NAME, varName, t.line)
// Add the assignment operator
t.AddToken(TOKEN_OPERATOR, "=", t.line)
// Tokenize the value expression
if len(value) > 0 {
t.TokenizeExpression(value)
} else {
// Empty value after =, which is invalid
// Add an error token to trigger proper parser error
t.AddToken(TOKEN_EOF, "ERROR_MISSING_VALUE", t.line)
}
} else {
// Invalid variable name (like a number or operator)
// Just tokenize as expressions to produce an error in the parser
t.TokenizeExpression(varName)
t.AddToken(TOKEN_OPERATOR, "=", t.line)
t.TokenizeExpression(value)
}
} else {
// No assignment, just an expression to evaluate
t.TokenizeExpression(blockContent)
}
case "include":
// Handle include with template path and optional context
withPos := strings.Index(strings.ToLower(blockContent), " with ")
if withPos != -1 {
templatePath := strings.TrimSpace(blockContent[:withPos])
contextExpr := strings.TrimSpace(blockContent[withPos+6:])
// Process template path
t.tokenizeTemplatePath(templatePath)
// Add 'with' keyword
t.AddToken(TOKEN_NAME, "with", t.line)
// Process context expression as object
if strings.HasPrefix(contextExpr, "{") && strings.HasSuffix(contextExpr, "}") {
// Context is an object literal
t.AddToken(TOKEN_PUNCTUATION, "{", t.line)
objectContent := contextExpr[1:len(contextExpr)-1]
t.tokenizeObjectContents(objectContent)
t.AddToken(TOKEN_PUNCTUATION, "}", t.line)
} else {
// Context is a variable or expression
t.TokenizeExpression(contextExpr)
}
} else {
// Just a template path
t.tokenizeTemplatePath(blockContent)
}
case "extends":
// Handle extends tag (similar to include template path)
t.tokenizeTemplatePath(blockContent)
case "from":
// Handle from tag which has a special format:
// {% from "template.twig" import macro1, macro2 as alias %}
importPos := strings.Index(strings.ToLower(blockContent), " import ")
if importPos != -1 {
// Extract template path and macros list
templatePath := strings.TrimSpace(blockContent[:importPos])
macrosStr := strings.TrimSpace(blockContent[importPos+8:]) // 8 = len(" import ")
// Process template path
t.tokenizeTemplatePath(templatePath)
// Add 'import' keyword
t.AddToken(TOKEN_NAME, "import", t.line)
// Process macro imports
macros := strings.Split(macrosStr, ",")
for i, macro := range macros {
macro = strings.TrimSpace(macro)
// Check for "as" alias
asPos := strings.Index(strings.ToLower(macro), " as ")
if asPos != -1 {
// Extract macro name and alias
macroName := strings.TrimSpace(macro[:asPos])
alias := strings.TrimSpace(macro[asPos+4:])
// Add macro name
macroName = t.GetStringConstant(macroName)
t.AddToken(TOKEN_NAME, macroName, t.line)
// Add 'as' keyword
t.AddToken(TOKEN_NAME, "as", t.line)
// Add alias
alias = t.GetStringConstant(alias)
t.AddToken(TOKEN_NAME, alias, t.line)
} else {
// Just the macro name
macro = t.GetStringConstant(macro)
t.AddToken(TOKEN_NAME, macro, t.line)
}
// Add comma if not the last macro
if i < len(macros)-1 {
t.AddToken(TOKEN_PUNCTUATION, ",", t.line)
}
}
} else {
// Malformed from tag, just tokenize as expression
t.TokenizeExpression(blockContent)
}
case "import":
// Handle import tag which allows importing entire templates
// {% import "template.twig" as alias %}
asPos := strings.Index(strings.ToLower(blockContent), " as ")
if asPos != -1 {
// Extract template path and alias
templatePath := strings.TrimSpace(blockContent[:asPos])
alias := strings.TrimSpace(blockContent[asPos+4:])
// Process template path
t.tokenizeTemplatePath(templatePath)
// Add 'as' keyword
t.AddToken(TOKEN_NAME, "as", t.line)
// Add alias
alias = t.GetStringConstant(alias)
t.AddToken(TOKEN_NAME, alias, t.line)
} else {
// Simple import without alias
t.TokenizeExpression(blockContent)
}
default:
// Other block types - tokenize as expression
t.TokenizeExpression(blockContent)
}
}
// Helper methods for specialized tag tokenization
// tokenizeTemplatePath handles template paths in extends/include tags
func (t *ZeroAllocTokenizer) tokenizeTemplatePath(path string) {
path = strings.TrimSpace(path)
// If it's a quoted string
if (strings.HasPrefix(path, "\"") && strings.HasSuffix(path, "\"")) ||
(strings.HasPrefix(path, "'") && strings.HasSuffix(path, "'")) {
// Extract content without quotes
content := path[1:len(path)-1]
t.AddToken(TOKEN_STRING, content, t.line)
} else {
// Otherwise tokenize as expression
t.TokenizeExpression(path)
}
}
// tokenizeObjectContents handles object literal contents
func (t *ZeroAllocTokenizer) tokenizeObjectContents(content string) {
// Track state for nested structures
inString := false
stringDelim := byte(0)
inObject := 0
inArray := 0
start := 0
colonPos := -1
for i := 0; i <= len(content); i++ {
// At end of string or at a comma at the top level
atEnd := i == len(content)
isComma := !atEnd && content[i] == ','
// Process key-value pair when we find a comma or reach the end
if (isComma || atEnd) && inObject == 0 && inArray == 0 && !inString {
if colonPos != -1 {
// We have a key-value pair
keyStr := strings.TrimSpace(content[start:colonPos])
valueStr := strings.TrimSpace(content[colonPos+1:i])
// Process key
if (len(keyStr) >= 2 && keyStr[0] == '"' && keyStr[len(keyStr)-1] == '"') ||
(len(keyStr) >= 2 && keyStr[0] == '\'' && keyStr[len(keyStr)-1] == '\'') {
// Quoted key
t.AddToken(TOKEN_STRING, keyStr[1:len(keyStr)-1], t.line)
} else {
// Unquoted key
keyStr = t.GetStringConstant(keyStr)
t.AddToken(TOKEN_NAME, keyStr, t.line)
}
// Add colon
t.AddToken(TOKEN_PUNCTUATION, ":", t.line)
// Process value
t.TokenizeExpression(valueStr)
// Add comma if needed
if isComma && i < len(content)-1 {
t.AddToken(TOKEN_PUNCTUATION, ",", t.line)
}
// Reset for next pair
start = i + 1
colonPos = -1
}
continue
}
// Skip end of string case
if atEnd {
continue
}
// Current character
c := content[i]
// Handle string literals
if (c == '"' || c == '\'') && (i == 0 || content[i-1] != '\\') {
if inString && c == stringDelim {
inString = false
} else if !inString {
inString = true
stringDelim = c
}
continue
}
// Skip processing inside strings
if inString {
continue
}
// Handle object and array nesting
if c == '{' {
inObject++
} else if c == '}' {
inObject--
} else if c == '[' {
inArray++
} else if c == ']' {
inArray--
}
// Track colon position for key-value separator
if c == ':' && inObject == 0 && inArray == 0 && colonPos == -1 {
colonPos = i
}
}
}
// ApplyWhitespaceControl applies whitespace control to the tokenized result
func (t *ZeroAllocTokenizer) ApplyWhitespaceControl() {
tokens := t.result
for i := 0; i < len(tokens); i++ {
token := tokens[i]
// Handle opening tags that trim whitespace before them
if token.Type == TOKEN_VAR_START_TRIM || token.Type == TOKEN_BLOCK_START_TRIM {
// If there's a text token before this, trim its trailing whitespace
if i > 0 && tokens[i-1].Type == TOKEN_TEXT {
tokens[i-1].Value = trimTrailingWhitespace(tokens[i-1].Value)
}
}
// Handle closing tags that trim whitespace after them
if token.Type == TOKEN_VAR_END_TRIM || token.Type == TOKEN_BLOCK_END_TRIM {
// If there's a text token after this, trim its leading whitespace
if i+1 < len(tokens) && tokens[i+1].Type == TOKEN_TEXT {
tokens[i+1].Value = trimLeadingWhitespace(tokens[i+1].Value)
}
}
}
}