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111
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1 // Explicit generic lambda test from N3690 5.1.2.5
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2 // { dg-do compile { target c++14 } }
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3 // { dg-options "-Wpedantic" }
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4
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5 #include <iostream>
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6
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7 int main()
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8 {
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131
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9 auto glambda = [] <typename A, typename B> (A a, B&& b) { return a < b; }; // { dg-warning "lambda templates are only available with" "" { target c++17_down } }
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111
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10 bool b = glambda(3, 3.14); // OK
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131
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11 auto vglambda = [] <typename P> (P printer) { // { dg-warning "lambda templates are only available with" "" { target c++17_down } }
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111
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12 return [=] <typename... T> (T&& ... ts) { // OK: ts is a function parameter pack
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131
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13 printer(std::forward<decltype(ts)>(ts)...); // { dg-warning "lambda templates are only available with" "" { target c++17_down } .-1 }
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111
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14 return [=]() {
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15 printer(ts ...);
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16 };
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17 };
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18 };
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131
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19 auto p = vglambda( [] <typename A, // { dg-warning "lambda templates are only available with" "" { target c++17_down } }
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111
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20 typename B,
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21 typename C> (A v1, B v2, C v3)
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22 { std::cout << v1 << v2 << v3; } );
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23 auto q = p(1, 'a', 3.14); // OK: outputs 1a3.14
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24 q(); // OK: outputs 1a3.14
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25 }
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26
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