59 lines
997 B
Go
59 lines
997 B
Go
package file
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import (
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"fmt"
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"strings"
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"unicode/utf8"
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)
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type Error struct {
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Location
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Message string
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Snippet string
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}
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func (e *Error) Error() string {
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return e.format()
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}
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func (e *Error) Bind(source *Source) *Error {
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if snippet, found := source.Snippet(e.Location.Line); found {
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snippet := strings.Replace(snippet, "\t", " ", -1)
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srcLine := "\n | " + snippet
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var bytes = []byte(snippet)
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var indLine = "\n | "
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for i := 0; i < e.Location.Column && len(bytes) > 0; i++ {
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_, sz := utf8.DecodeRune(bytes)
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bytes = bytes[sz:]
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if sz > 1 {
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goto noind
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} else {
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indLine += "."
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}
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}
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if _, sz := utf8.DecodeRune(bytes); sz > 1 {
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goto noind
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} else {
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indLine += "^"
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}
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srcLine += indLine
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noind:
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e.Snippet = srcLine
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}
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return e
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}
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func (e *Error) format() string {
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if e.Location.Empty() {
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return e.Message
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}
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return fmt.Sprintf(
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"%s (%d:%d)%s",
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e.Message,
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e.Line,
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e.Column+1, // add one to the 0-based column for display
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e.Snippet,
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)
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}
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