modernc.org/gc@v1.0.1-0.20240304020402-f0dba7c97c2b/testdata/errchk/test/reflectmethod2.go (about)

     1  // run
     2  
     3  // Copyright 2016 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // The linker can prune methods that are not directly called or
     8  // assigned to interfaces, but only if reflect.Type.MethodByName is
     9  // never used. Test it here.
    10  
    11  package main
    12  
    13  import reflect1 "reflect"
    14  
    15  var called = false
    16  
    17  type M int
    18  
    19  func (m M) UniqueMethodName() {
    20  	called = true
    21  }
    22  
    23  var v M
    24  
    25  type MyType interface {
    26  	MethodByName(string) (reflect1.Method, bool)
    27  }
    28  
    29  func main() {
    30  	var t MyType = reflect1.TypeOf(v)
    31  	m, _ := t.MethodByName("UniqueMethodName")
    32  	m.Func.Interface().(func(M))(v)
    33  	if !called {
    34  		panic("UniqueMethodName not called")
    35  	}
    36  }