Function getLen

assert/assertions.go:821–827

getLen tries to get the length of an object. It returns (0, false) if impossible.

(x interface{})

// getLen tries to get the length of an object.
// It returns (0, false) if impossible.
func getLen(x interface{}) (length int, ok bool) {
	v := reflect.ValueOf(x)
	defer func() {
		ok = recover() == nil
	}()
	return v.Len(), true
}

// Len asserts that the specified object has specific length.
// Len also fails if the object has a type that len() not accept.