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// run
// Copyright 2021 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
type S struct{
m1Called, m2Called bool
}
func (s *S) M1(int) (int, int) {
s.m1Called = true
return 0, 0
}
func (s *S) M2(int) (int, int) {
s.m2Called = true
return 0, 0
}
type C struct {
calls []func(int) (int, int)
}
func makeC() Funcs {
return &C{}
}
func (c *C) Add(fn func(int) (int, int)) Funcs {
c.calls = append(c.calls, fn)
return c
}
func (c *C) Call() {
for _, fn := range c.calls {
fn(0)
}
}
type Funcs interface {
Add(func(int) (int, int)) Funcs
Call()
}
func main() {
s := &S{}
c := makeC().Add(s.M1).Add(s.M2)
c.Call()
if !s.m1Called || !s.m2Called {
panic("missed method call")
}
}
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