misc/cgo/errors/testdata/issue42580.go

   1 // Copyright 2021 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 // Issue 42580: cmd/cgo: shifting identifier position in ast
   6
   7 package cgotest
   8
   9 // typedef int (*intFunc) ();
  10 //
  11 // char* strarg = "";
  12 //
  13 // int func_with_char(char* arg, void* dummy)
  14 // {return 5;}
  15 //
  16 // int* get_arr(char* arg, void* dummy)
  17 // {return NULL;}
  18 import "C"
  19 import "unsafe"
  20
  21 // Test variables
  22 var (
  23         checkedPointer            = []byte{1}
  24         doublePointerChecked      = []byte{1}
  25         singleInnerPointerChecked = []byte{1}
  26 )
  27
  28 // This test checks the positions of variable identifiers.
  29 // Changing the positions of the test variables idents after this point will break the test.
  30
  31 func TestSingleArgumentCast() C.int {
  32         retcode := C.func_with_char((*C.char)(unsafe.Pointer(&checkedPointer[0])), unsafe.Pointer(C.strarg))
  33         return retcode
  34 }
  35
  36 func TestSingleArgumentCastRecFuncAsSimpleArg() C.int {
  37         retcode := C.func_with_char((*C.char)(unsafe.Pointer(C.get_arr((*C.char)(unsafe.Pointer(&singleInnerPointerChecked[0])), unsafe.Pointer(C.strarg)))), nil)
  38         return retcode
  39 }
  40
  41 func TestSingleArgumentCastRecFunc() C.int {
  42         retcode := C.func_with_char((*C.char)(unsafe.Pointer(C.get_arr((*C.char)(unsafe.Pointer(&doublePointerChecked[0])), unsafe.Pointer(C.strarg)))), unsafe.Pointer(C.strarg))
  43         return retcode
  44 }