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111
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1 // { dg-do compile { target c++11 } }
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2
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3 // From N2235
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4
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5 // 4.5.3 constant expressions
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6
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7 // p 4
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8 struct A {
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9 constexpr A(int i) : val(i) { }
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10 constexpr operator int() const { return val; }
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11 constexpr operator long() const { return -1; }
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12 private:
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13 int val;
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14 };
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15
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16 template<int I> struct X { static const int i = I; };
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17 constexpr A a = 42;
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18
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19 X<a> x; // OK: unique conversion to int
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20 int ar[X<a>::i]; // also OK
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131
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21 int ary[a]; // { dg-error "could not convert|ambiguous|conversion|array" } ambiguous conversion
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111
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22
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