/
githubmirror
/
go
Обзор
Документация
Войти
/
githubmirror
/
go
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
test/fixedbugs/issue37716.go
32 строки
872 B
Keith Randall
runtime: make typehash match compiler generated hashes exactly
10 мар 2020, 19:26
10 мар 2020, 19:26
2b8e60d
Код
Авторство
О чём код?
// 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") } }