| 1 | // RUN: %clang_cc1 -std=c++14 -fsyntax-only -verify %s |
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| 2 | |
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| 3 | template <class> auto fn0 = [] {}; |
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| 4 | template <typename> void foo0() { fn0<char>(); } |
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| 5 | |
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| 6 | template<typename T> auto fn1 = [](auto a) { return a + T(1); }; |
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| 7 | template<typename T> auto v1 = [](int a = T(1)) { return a; }(); |
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| 8 | |
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| 9 | struct S { |
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| 10 | template<class T> |
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| 11 | static constexpr T t = [](int f = T(7)){return f;}(); // expected-error{{constexpr variable 't<int>' must be initialized by a constant expression}} expected-note{{cannot be used in a constant expression}} |
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| 12 | }; |
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| 13 | |
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| 14 | template <typename X> |
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| 15 | int foo2() { |
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| 16 | X a = 0x61; |
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| 17 | fn1<char>(a); |
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| 18 | (void)v1<int>; |
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| 19 | (void)S::t<int>; // expected-note{{in instantiation of static data member 'S::t<int>' requested here}} |
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| 20 | return 0; |
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| 21 | } |
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| 22 | |
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| 23 | template<class C> |
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| 24 | int foo3() { |
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| 25 | C::m1(); // expected-error{{type 'long long' cannot be used prior to '::' because it has no members}} |
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| 26 | return 1; |
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| 27 | } |
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| 28 | |
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| 29 | template<class C> |
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| 30 | auto v2 = [](int a = foo3<C>()){}; // expected-note{{in instantiation of function template specialization 'foo3<long long>' requested here}} |
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| 31 | |
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| 32 | int main() { |
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| 33 | v2<long long>(); // This line causes foo3<long long> to be instantiated. |
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| 34 | v2<long long>(2); // This line does not. |
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| 35 | foo2<int>(); |
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| 36 | } |
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| 37 | |
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