libgo/misc/cgo/test/issue9557.go

   1 // Copyright 2015 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 // cgo rewrote C.var to *_Cvar_var, but left
   6 // C.var.field as _Cvar.var.field.  It now rewrites
   7 // the latter as (*_Cvar_var).field.
   8 // See https://golang.org/issue/9557.
   9
  10 package cgotest
  11
  12 // struct issue9557_t {
  13 //   int a;
  14 // } test9557bar = { 42 };
  15 //
  16 // struct issue9557_t *issue9557foo = &test9557bar;
  17 import "C"
  18 import "testing"
  19
  20 func test9557(t *testing.T) {
  21         // implicitly dereference a Go variable
  22         foo := C.issue9557foo
  23         if v := foo.a; v != 42 {
  24                 t.Fatalf("foo.a expected 42, but got %d", v)
  25         }
  26
  27         // explicitly dereference a C variable
  28         if v := (*C.issue9557foo).a; v != 42 {
  29                 t.Fatalf("(*C.issue9557foo).a expected 42, but is %d", v)
  30         }
  31
  32         // implicitly dereference a C variable
  33         if v := C.issue9557foo.a; v != 42 {
  34                 t.Fatalf("C.issue9557foo.a expected 42, but is %d", v)
  35         }
  36 }