Function TypedFuncIndex

checker/info.go:51–102

(fn reflect.Type, method bool)

}

func TypedFuncIndex(fn reflect.Type, method bool) (int, bool) {
	if fn == nil {
		return 0, false
	}
	if fn.Kind() != reflect.Func {
		return 0, false
	}
	// OnCallTyped doesn't work for functions with variadic arguments.
	if fn.IsVariadic() {
		return 0, false
	}
	// OnCallTyped doesn't work named function, like `type MyFunc func() int`.
	if fn.PkgPath() != "" { // If PkgPath() is not empty, it means that function is named.
		return 0, false
	}

	fnNumIn := fn.NumIn()
	fnInOffset := 0
	if method {
		fnNumIn--
		fnInOffset = 1
	}

funcTypes:
	for i := range vm.FuncTypes {
		if i == 0 {
			continue
		}
		typed := reflect.ValueOf(vm.FuncTypes[i]).Elem().Type()
		if typed.Kind() != reflect.Func {
			continue
		}
		if typed.NumOut() != fn.NumOut() {
			continue
		}
		for j := 0; j < typed.NumOut(); j++ {
			if typed.Out(j) != fn.Out(j) {
				continue funcTypes
			}
		}
		if typed.NumIn() != fnNumIn {
			continue
		}
		for j := 0; j < typed.NumIn(); j++ {
			if typed.In(j) != fn.In(j+fnInOffset) {
				continue funcTypes
			}
		}
		return i, true
	}
	return 0, false
}

func IsFastFunc(fn reflect.Type, method bool) bool {
	if fn == nil {