mirror of
https://github.com/golang/go
synced 2024-11-15 03:30:37 -07:00
840b346c5d
This CL changes cmd/compile to reject anonymous interface cycles like:
type I interface { m() interface { I } }
We don't anticipate any users to be affected by this change in
practice. Nonetheless, this CL also adds a `-d=interfacecycles`
compiler flag to suppress the error. And assuming no issue reports
from users, we'll move the check into go/types and types2 instead.
Updates #56103.
Change-Id: I1f1dce2d7aa19fb388312cc020e99cc354afddcb
Reviewed-on: https://go-review.googlesource.com/c/go/+/445598
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
45 lines
679 B
Go
45 lines
679 B
Go
// compile -d=interfacecycles
|
|
|
|
// Copyright 2012 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.
|
|
|
|
// Used to crash compiler in interface type equality check.
|
|
// (This test used to have problems - see #15596.)
|
|
|
|
package p
|
|
|
|
// exported interfaces
|
|
|
|
type I1 interface {
|
|
F() interface{I1}
|
|
}
|
|
|
|
type I2 interface {
|
|
F() interface{I2}
|
|
}
|
|
|
|
var V1 I1
|
|
var V2 I2
|
|
|
|
func F() bool {
|
|
return V1 == V2
|
|
}
|
|
|
|
// non-exported interfaces
|
|
|
|
type i1 interface {
|
|
F() interface{i1}
|
|
}
|
|
|
|
type i2 interface {
|
|
F() interface{i2}
|
|
}
|
|
|
|
var v1 i1
|
|
var v2 i2
|
|
|
|
func f() bool {
|
|
return v1 == v2
|
|
}
|