52 lines
813 B
Go
52 lines
813 B
Go
package lexer
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import (
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"errors"
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"fmt"
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"strings"
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)
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var (
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_ error = (*Error)(nil)
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)
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var (
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// ErrUnacceptableRune indicates the read rune
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ErrUnacceptableRune = errors.New("rune not acceptable in context")
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)
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// Error represents a generic parsing error
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type Error struct {
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Filename string
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Line int
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Column int
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Content string
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Err error
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}
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func (err Error) Error() string {
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var s []string
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switch {
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case err.Line > 0 || err.Column > 0:
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s = append(s, fmt.Sprintf("%s:%v:%v", err.Filename, err.Line, err.Column))
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case err.Filename != "":
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s = append(s, err.Filename)
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}
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if err.Err != nil {
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s = append(s, err.Err.Error())
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}
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if err.Content != "" {
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s = append(s, fmt.Sprintf("%q", err.Content))
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}
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return strings.Join(s, ": ")
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}
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func (err Error) Unwrap() error {
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return err.Err
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}
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