go issue37716 源码
golang issue37716 代码
文件路径：/test/fixedbugs/issue37716.go
// 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")
}
}
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