go cycles1 源码
golang cycles1 代码
文件路径：/src/cmd/compile/internal/types2/testdata/check/cycles1.go
// Copyright 2013 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 p
type (
A interface {
a() interface {
ABC1
}
}
B interface {
b() interface {
ABC2
}
}
C interface {
c() interface {
ABC3
}
}
AB interface {
A
B
}
BC interface {
B
C
}
ABC1 interface {
A
B
C
}
ABC2 interface {
AB
C
}
ABC3 interface {
A
BC
}
)
var (
x1 ABC1
x2 ABC2
x3 ABC3
)
func _() {
// all types have the same method set
x1 = x2
x2 = x1
x1 = x3
x3 = x1
x2 = x3
x3 = x2
// all methods return the same type again
x1 = x1.a()
x1 = x1.b()
x1 = x1.c()
x2 = x2.a()
x2 = x2.b()
x2 = x2.c()
x3 = x3.a()
x3 = x3.b()
x3 = x3.c()
}
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