| 1 | // RUN: %clang_cc1 -verify -std=c++1y %s |
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| 2 | |
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| 3 | namespace PR17846 { |
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| 4 | template <typename T> constexpr T pi = T(3.14); |
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| 5 | template <typename T> constexpr T tau = 2 * pi<T>; |
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| 6 | constexpr double tau_double = tau<double>; |
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| 7 | static_assert(tau_double == 6.28, ""); |
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| 8 | } |
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| 9 | |
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| 10 | namespace PR17848 { |
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| 11 | template<typename T> constexpr T var = 12345; |
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| 12 | template<typename T> constexpr T f() { return var<T>; } |
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| 13 | constexpr int k = f<int>(); |
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| 14 | static_assert(k == 12345, ""); |
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| 15 | } |
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| 16 | |
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| 17 | namespace NonDependent { |
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| 18 | template<typename T> constexpr T a = 0; |
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| 19 | template<typename T> constexpr T b = a<int>; |
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| 20 | static_assert(b<int> == 0, ""); |
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| 21 | } |
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| 22 | |
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| 23 | namespace InstantiationDependent { |
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| 24 | int f(int); |
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| 25 | void f(char); |
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| 26 | |
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| 27 | template<int> constexpr int a = 1; |
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| 28 | template<typename T> constexpr T b = a<sizeof(sizeof(f(T())))>; // expected-error {{invalid application of 'sizeof' to an incomplete type 'void'}} |
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| 29 | |
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| 30 | static_assert(b<int> == 1, ""); |
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| 31 | static_assert(b<char> == 1, ""); // expected-note {{in instantiation of}} expected-error {{not an integral constant}} |
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| 32 | |
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| 33 | template<typename T> void f() { |
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| 34 | static_assert(a<sizeof(sizeof(f(T())))> == 0, ""); // expected-error {{static_assert failed}} |
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| 35 | } |
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| 36 | } |
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| 37 | |
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| 38 | namespace PR24483 { |
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| 39 | template<typename> struct A; |
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| 40 | template<typename... T> A<T...> models; |
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| 41 | template<> struct B models<>; // expected-error {{incomplete type 'struct B'}} expected-note {{forward declaration}} |
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| 42 | } |
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| 43 | |
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