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1 // PR c++/91548 - fix detecting modifying const objects for ARRAY_REF.
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2 // { dg-do compile { target c++14 } }
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3
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4 constexpr int& impl(const int (&array)[10], int index) {
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5 return const_cast<int&>(array[index]);
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6 }
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7
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8 struct A {
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9 constexpr int& operator[](int i) { return impl(elems, i); }
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10 const int elems[10];
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11 };
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12
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13 constexpr bool
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14 f()
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15 {
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16 A arr = {};
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17 arr[2] = 1; // { dg-error "modifying a const object" }
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18 return false;
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19 }
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20
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21 constexpr bool b = f(); // { dg-message "in .constexpr. expansion of " }
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22 // { dg-message "originally declared" "" { target *-*-* } .-1 }
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