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// { dg-do compile }
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// Origin: Giovanni Bajo <giovannibajo at gcc dot gnu dot org>
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// DR179: Function pointers and subtraction
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void foo(void);
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typedef void (*fp)(void);
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int main()
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{
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fp f1 = foo;
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fp f2 = foo;
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(void)f2-f1; // { dg-error "" "cannot subtract pointers to function" }
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}
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