Method ToDisplayString

common/error.go:46–74

ToDisplayString decorates the error message with the source location.

(source Source)

// ToDisplayString decorates the error message with the source location.
func (e *Error) ToDisplayString(source Source) string {
	var result = fmt.Sprintf("ERROR: %s:%d:%d: %s",
		source.Description(),
		e.Location.Line(),
		e.Location.Column()+1, // add one to the 0-based column for display
		e.Message)
	if snippet, found := source.Snippet(e.Location.Line()); found && len(snippet) <= maxSnippetLength {
		snippet := strings.Replace(snippet, "\t", " ", -1)
		srcLine := "\n | " + snippet
		var bytes = []byte(snippet)
		var indLine = "\n | "
		for i := 0; i < e.Location.Column() && len(bytes) > 0; i++ {
			_, sz := utf8.DecodeRune(bytes)
			bytes = bytes[sz:]
			if sz > 1 {
				indLine += wideDot
			} else {
				indLine += dot
			}
		}
		if _, sz := utf8.DecodeRune(bytes); sz > 1 {
			indLine += wideInd
		} else {
			indLine += ind
		}
		result += srcLine + indLine
	}
	return result
}