mirror of
https://github.com/golang/go
synced 2024-11-18 02:04:45 -07:00
37 lines
543 B
Go
37 lines
543 B
Go
|
// 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 a
|
||
|
|
|
||
|
|
type Node interface {
|
||
|
|
Position()
|
||
|
|
}
|
||
|
|
|
||
|
|
type noder struct{}
|
||
|
|
|
||
|
|
func (noder) Position() {}
|
||
|
|
|
||
|
|
type Scope map[int][]Node
|
||
|
|
|
||
|
|
func (s Scope) M1() Scope {
|
||
|
|
if x, ok := s[0]; ok {
|
||
|
|
return x[0].(struct {
|
||
|
|
noder
|
||
|
|
Scope
|
||
|
|
}).Scope
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s Scope) M2() Scope {
|
||
|
|
if x, ok := s[0]; ok {
|
||
|
|
st, _ := x[0].(struct {
|
||
|
|
noder
|
||
|
|
Scope
|
||
|
|
})
|
||
|
|
return st.Scope
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|