go cycles2 源码
golang cycles2 代码
文件路径：/src/cmd/compile/internal/types2/testdata/check/cycles2.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
import "unsafe"
// Test case for issue 5090
type t interface {
f(u)
}
type u interface {
t
}
func _() {
var t t
var u u
t.f(t)
t.f(u)
u.f(t)
u.f(u)
}
// Test case for issues #6589, #33656.
type A interface {
a() interface {
AB
}
}
type B interface {
b() interface {
AB
}
}
type AB interface {
a() interface {
A
B
}
b() interface {
A
B
}
}
var x AB
var y interface {
A
B
}
var _ = x == y
// Test case for issue 6638.
type T interface {
m() [T(nil).m /* ERROR undefined */ ()[0]]int
}
// Variations of this test case.
type T1 /* ERROR cycle */ interface {
m() [x1.m()[0]]int
}
var x1 T1
type T2 /* ERROR cycle */ interface {
m() [len(x2.m())]int
}
var x2 T2
type T3 /* ERROR cycle */ interface {
m() [unsafe.Sizeof(x3.m)]int
}
var x3 T3
type T4 /* ERROR cycle */ interface {
m() [unsafe.Sizeof(cast4(x4.m))]int // cast is invalid but we have a cycle, so all bets are off
}
var x4 T4
var _ = cast4(x4.m)
type cast4 func()
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