Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/Wunused-value-1.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* Test -Wunused-value. Bug 23113. */ /* Origin: Joseph Myers <joseph@codesourcery.com> */ /* { dg-do compile } */ /* { dg-options "-Wunused-value" } */ int f (void); void g (void); int *p; void h (void) { 1 + f (); /* { dg-warning "value computed is not used" } */ f () + f (); /* { dg-warning "value computed is not used" } */ f () + f (), f (); /* { dg-warning "value computed is not used" } */ (char) f (); /* { dg-warning "value computed is not used" } */ g (); f (); (void) f (); *p++; /* { dg-warning "value computed is not used" } */ ++*p; (*p ? f() : 0); ({ f(); }); /* Statement expressions may be used in macro expansions which like functions return values which may or may not be of use, so don't warn for them but do warn inside them. */ ({ f() + 1; }); ({ f(); 0; }); ({ f() + 1; 0; }); /* { dg-warning "value computed is not used" } */ 1 + ({ f(); }); /* { dg-warning "value computed is not used" } */ }