diff options
Diffstat (limited to 'libgo/misc/cgo/test/issue17537.go')
-rw-r--r-- | libgo/misc/cgo/test/issue17537.go | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/libgo/misc/cgo/test/issue17537.go b/libgo/misc/cgo/test/issue17537.go new file mode 100644 index 00000000000..777104e5122 --- /dev/null +++ b/libgo/misc/cgo/test/issue17537.go @@ -0,0 +1,58 @@ +// Copyright 2016 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. + +// Issue 17537. The void* cast introduced by cgo to avoid problems +// with const/volatile qualifiers breaks C preprocessor macros that +// emulate functions. + +package cgotest + +/* +#include <stdlib.h> + +typedef struct { + int i; +} S17537; + +int I17537(S17537 *p); + +#define I17537(p) ((p)->i) + +// Calling this function used to fail without the cast. +const int F17537(const char **p) { + return **p; +} + +// Calling this function used to trigger an error from the C compiler +// (issue 18298). +void F18298(const void *const *p) { +} + +// Test that conversions between typedefs work as they used to. +typedef const void *T18298_1; +struct S18298 { int i; }; +typedef const struct S18298 *T18298_2; +void G18298(T18298_1 t) { +} +*/ +import "C" + +import "testing" + +func test17537(t *testing.T) { + v := C.S17537{i: 17537} + if got, want := C.I17537(&v), C.int(17537); got != want { + t.Errorf("got %d, want %d", got, want) + } + + p := (*C.char)(C.malloc(1)) + *p = 17 + if got, want := C.F17537(&p), C.int(17); got != want { + t.Errorf("got %d, want %d", got, want) + } + + C.F18298(nil) + var v18298 C.T18298_2 + C.G18298(C.T18298_1(v18298)) +} |