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e36aeda | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | // Copyright 2023 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.
// Methods of reflect.rtype use StructOf and FuncOf which in turn depend on
// reflect.Value.Method. StructOf and FuncOf must not disable the DCE.
package main
import "reflect"
type S int
func (s S) M() { println("S.M") }
func (s S) N() { println("S.N") }
type T float64
func (t T) F(s S) {}
func useStructOf() {
t := reflect.StructOf([]reflect.StructField{
{
Name: "X",
Type: reflect.TypeOf(int(0)),
},
})
println(t.Name())
}
func useFuncOf() {
t := reflect.FuncOf(
[]reflect.Type{reflect.TypeOf(int(0))},
[]reflect.Type{reflect.TypeOf(int(0))},
false,
)
println(t.Name())
}
func main() {
useStructOf()
useFuncOf()
var t T
meth, _ := reflect.TypeOf(t).MethodByName("F")
ft := meth.Type
at := ft.In(1)
v := reflect.New(at).Elem()
methV := v.MethodByName("M")
methV.Call([]reflect.Value{v})
}
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