Function IsFastFunc

checker/info.go:104–125

(fn reflect.Type, method bool)

}

func IsFastFunc(fn reflect.Type, method bool) bool {
	if fn == nil {
		return false
	}
	if fn.Kind() != reflect.Func {
		return false
	}
	numIn := 1
	if method {
		numIn = 2
	}
	if fn.IsVariadic() &&
		fn.NumIn() == numIn &&
		fn.NumOut() == 1 &&
		fn.Out(0).Kind() == reflect.Interface {
		rest := fn.In(fn.NumIn() - 1) // function has only one param for functions and two for methods
		if rest != nil && rest.Kind() == reflect.Slice && rest.Elem().Kind() == reflect.Interface {
			return true
		}
	}
	return false
}