32 lines
966 B
C
32 lines
966 B
C
/* Test -Wunused-value. Bug 23113. */
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/* Origin: Joseph Myers <joseph@codesourcery.com> */
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/* { dg-do compile } */
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/* { dg-options "-Wunused-value" } */
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int f (void);
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void g (void);
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int *p;
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void
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h (void)
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{
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1 + f (); /* { dg-warning "value computed is not used" } */
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f () + f (); /* { dg-warning "value computed is not used" } */
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f () + f (), f (); /* { dg-warning "value computed is not used" } */
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(char) f (); /* { dg-warning "value computed is not used" } */
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g ();
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f ();
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(void) f ();
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*p++; /* { dg-warning "value computed is not used" } */
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++*p;
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(*p ? f() : 0);
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({ f(); });
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/* Statement expressions may be used in macro expansions which like
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functions return values which may or may not be of use, so don't
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warn for them but do warn inside them. */
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({ f() + 1; });
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({ f(); 0; });
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({ f() + 1; 0; }); /* { dg-warning "value computed is not used" } */
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1 + ({ f(); }); /* { dg-warning "value computed is not used" } */
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}
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