| // run |
| |
| package main |
| |
| import ( |
| "fmt" |
| "reflect" |
| "strings" |
| ) |
| |
| // Copyright 2019 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| func main() { |
| defer func() { |
| e := recover() |
| if e == nil { |
| panic("should have panicked") |
| } |
| text := fmt.Sprintf("%s", e) // handles both string and runtime.errorString |
| if !strings.HasPrefix(text, "reflect:") { |
| panic("wanted a reflect error, got this instead:\n" + text) |
| } |
| }() |
| r := reflect.MakeFunc(reflect.TypeOf(func() error { return nil }), |
| func(args []reflect.Value) []reflect.Value { |
| var x [1]reflect.Value |
| return x[:] |
| }).Interface().(func() error) |
| r() |
| } |
