Method formatSingleLineOutput

errbase/format_error.go:318–345

formatSingleLineOutput prints the details extracted via formatRecursive() through the chain of errors as if .Error() has been called: it only prints the non-detail parts and prints them on one line with ": " separators. This function is used both when FormatError() is called indirectly from .Error(

()

// from redact.SafePrinter to do this, so care should be taken below
// to properly escape markers, etc.
func (s *state) formatSingleLineOutput() {
	for i := len(s.entries) - 1; i >= 0; i-- {
		entry := &s.entries[i]
		if entry.elideShort {
			continue
		}
		if s.finalBuf.Len() > 0 && len(entry.head) > 0 {
			s.finalBuf.WriteString(": ")
		}
		if len(entry.head) == 0 {
			// shortcut, to avoid the copy below.
			continue
		}
		if !s.redactableOutput || entry.redactable {
			// If we don't care about redaction, then we can pass the string
			// through.
			//
			// If we do care about redaction, and entry.redactable is true,
			// then entry.head is already a RedactableBytes. Then we can
			// also pass it through.
			s.finalBuf.Write(entry.head)
		} else {
			// We do care about redaction, but entry.redactable is unset.
			// This means entry.head is unsafe. We need to escape it.
			s.finalBuf.Write([]byte(redact.EscapeBytes(entry.head)))
		}
	}
}

// formatRecursive performs a post-order traversal on the chain of
// errors to collect error details from innermost to outermost.