| // run |
| |
| // Copyright 2020 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. |
| |
| package main |
| |
| import "reflect" |
| |
| // complicated enough to require a compile-generated hash function |
| type K struct { |
| a, b int32 // these get merged by the compiler into a single field, something typehash doesn't do |
| c float64 |
| } |
| |
| func main() { |
| k := K{a: 1, b: 2, c: 3} |
| |
| // Make a reflect map. |
| m := reflect.MakeMap(reflect.MapOf(reflect.TypeOf(K{}), reflect.TypeOf(true))) |
| m.SetMapIndex(reflect.ValueOf(k), reflect.ValueOf(true)) |
| |
| // The binary must not contain the type map[K]bool anywhere, or reflect.MapOf |
| // will use that type instead of making a new one. So use an equivalent named type. |
| type M map[K]bool |
| var x M |
| reflect.ValueOf(&x).Elem().Set(m) |
| if !x[k] { |
| panic("key not found") |
| } |
| } |
