tests/test-noreturn.c

   1 /* Test of macros for declaring functions as non-returning.
   2    Copyright (C) 2017-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2017.  */
  18
  19 #include <config.h>
  20
  21 #include <noreturn.h>
  22
  23 /* Test _GL_NORETURN_FUNC on function declarations.  */
  24
  25 _GL_NORETURN_FUNC extern void func1 (void);
  26 extern _GL_NORETURN_FUNC void func2 (void);
  27 extern void _GL_NORETURN_FUNC func3 (void);
  28
  29 /* Test _GL_NORETURN_FUNC on function definitions.  */
  30
  31 _GL_NORETURN_FUNC void funcd (void)
  32 {
  33   for (;;)
  34     ;
  35 }
  36
  37 /* Test _GL_NORETURN_FUNCPTR.  */
  38
  39 _GL_NORETURN_FUNCPTR void (*func1_ptr) (void) = func1;
  40 _GL_NORETURN_FUNCPTR void (*func2_ptr) (void) = func2;
  41 _GL_NORETURN_FUNCPTR void (*func3_ptr) (void) = func3;
  42 _GL_NORETURN_FUNCPTR void (*funcd_ptr) (void) = funcd;
  43
  44 /* These could also be defined in a separate compilation unit.  */
  45
  46 void func1 (void)
  47 {
  48   for (;;)
  49     ;
  50 }
  51
  52 void func2 (void)
  53 {
  54   for (;;)
  55     ;
  56 }
  57
  58 void func3 (void)
  59 {
  60   for (;;)
  61     ;
  62 }
  63
  64
  65 int
  66 main ()
  67 {
  68   return 0;
  69 }