NewErrorf() — fiber Function Reference

Architecture documentation for the NewErrorf() function in app.go from the fiber codebase.

Function go FiberCore Context

Entity Profile

FiberCore→ Context→ NewErrorf() — fiber Function Reference

Dependency Diagram

graph TD
  40140355_282c_0830_dbfb_efb62d467eaa["NewErrorf()"]
  258982c0_9752_bf98_01ce_836d4de563e1["app.go"]
  40140355_282c_0830_dbfb_efb62d467eaa -->|defined in| 258982c0_9752_bf98_01ce_836d4de563e1
  style 40140355_282c_0830_dbfb_efb62d467eaa fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

app.go lines 1018–1045

func NewErrorf(code int, message ...any) *Error {
	var msg string

	switch len(message) {
	case 0:
		// nothing to override
		msg = utils.StatusMessage(code)

	case 1:
		// One argument → treat it like fmt.Sprint(arg)
		if s, ok := message[0].(string); ok {
			msg = s
		} else {
			msg = fmt.Sprint(message[0])
		}

	default:
		// Two or more → first must be a format string.
		if format, ok := message[0].(string); ok {
			msg = fmt.Sprintf(format, message[1:]...)
		} else {
			// If the first arg isn’t a string, fall back.
			msg = fmt.Sprint(message[0])
		}
	}

	return &Error{Code: code, Message: msg}
}