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111
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1 // Test to verify that evaluating reinterpret_cast is diagnosed in
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2 // constant expressions.
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3 // { dg-do compile { target c++11 } }
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4
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5 int i;
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6
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131
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7 // The following was accepted due to bug 49171.
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8 constexpr void *q = reinterpret_cast<void*>(&i); // { dg-error "not a constant expression" }
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111
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9
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10 constexpr void *r0 = reinterpret_cast<void*>(1); // { dg-error "not a constant expression|reinterpret_cast from integer to pointer" }
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11 constexpr void *r1 = reinterpret_cast<void*>(sizeof 'x'); // { dg-error ".reinterpret_cast<void\\*>\\(1\[ul\]\*\\). is not a constant expression" }
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12
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13 template <class T>
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14 constexpr bool f ()
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15 {
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16 #if __cplusplus > 201103L
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17 T *p = reinterpret_cast<T*>(sizeof (T));
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18 return p;
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19 #else
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20 return *reinterpret_cast<T*>(sizeof (T));
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21 #endif
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22 }
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23
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131
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24 constexpr bool b = f<int>(); // { dg-error "not a constant expression|in .constexpr. expansion of " }
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