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63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
package parser
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import "fmt"
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// An Error is a parse error during template parsing.
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type Error interface {
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error
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Cause() error
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Path() string
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LineNumber() int
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}
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// A Locatable provides source location information for error reporting.
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type Locatable interface {
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SourceLocation() SourceLoc
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SourceText() string
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}
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// Errorf creates a parser.Error.
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func Errorf(loc Locatable, format string, a ...interface{}) *sourceLocError { // nolint: golint
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return &sourceLocError{loc.SourceLocation(), loc.SourceText(), fmt.Sprintf(format, a...), nil}
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}
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// WrapError wraps its argument in a parser.Error if this argument is not already a parser.Error and is not locatable.
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func WrapError(err error, loc Locatable) Error {
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if err == nil {
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return nil
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}
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if e, ok := err.(Error); ok {
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return e
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}
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re := Errorf(loc, "%s", err)
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re.cause = err
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return re
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}
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type sourceLocError struct {
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SourceLoc
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context string
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message string
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cause error
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}
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func (e *sourceLocError) Cause() error {
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return e.cause
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}
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func (e *sourceLocError) Path() string {
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return e.Pathname
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}
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func (e *sourceLocError) LineNumber() int {
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return e.LineNo
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}
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func (e *sourceLocError) Error() string {
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locative := " in " + e.context
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if e.Pathname != "" {
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locative = " in " + e.Pathname
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}
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return fmt.Sprintf("Liquid error (line %d): %s%s", e.LineNo, e.message, locative)
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}
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