mirror of
https://github.com/golang/go
synced 2024-11-05 17:36:15 -07:00
be2edb5761
plus significant hand editing.
Back to T{x} for composite literals.
R=r
OCL=25612
CL=25632
74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
|
|
|
|
// Copyright 2009 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
|
|
|
|
import "unsafe"
|
|
|
|
func use(bool) { }
|
|
|
|
func stringptr(s string) uintptr {
|
|
return *(*uintptr)(unsafe.Pointer(&s));
|
|
}
|
|
|
|
func isfalse(b bool) {
|
|
if b { panicln("wanted false, got true") } // stack will explain where
|
|
}
|
|
|
|
func istrue(b bool) {
|
|
if !b { panicln("wanted true, got false") } // stack will explain where
|
|
}
|
|
|
|
func main()
|
|
{
|
|
var a []int;
|
|
var b map[string]int;
|
|
|
|
var c string = "hello";
|
|
var d string = "hel"; // try to get different pointer
|
|
d = d + "lo";
|
|
if stringptr(c) == stringptr(d) {
|
|
panic("compiler too smart -- got same string")
|
|
}
|
|
|
|
var e = make(chan int);
|
|
|
|
var ia interface{} = a;
|
|
var ib interface{} = b;
|
|
var ic interface{} = c;
|
|
var id interface{} = d;
|
|
var ie interface{} = e;
|
|
|
|
// these comparisons are okay because
|
|
// string compare is okay and the others
|
|
// are comparisons where the types differ.
|
|
isfalse(ia == ib);
|
|
isfalse(ia == ic);
|
|
isfalse(ia == id);
|
|
isfalse(ib == ic);
|
|
isfalse(ib == id);
|
|
istrue(ic == id);
|
|
istrue(ie == ie);
|
|
|
|
// 6g used to let this go through as true.
|
|
var g uint64 = 123;
|
|
var h int64 = 123;
|
|
var ig interface{} = g;
|
|
var ih interface{} = h;
|
|
isfalse(ig == ih);
|
|
|
|
// map of interface should use == on interface values,
|
|
// not memory.
|
|
// TODO: should m[c], m[d] be valid here?
|
|
var m = make(map[interface{}] int);
|
|
m[ic] = 1;
|
|
m[id] = 2;
|
|
if m[ic] != 2 {
|
|
panic("m[ic] = ", m[ic]);
|
|
}
|
|
}
|
|
|