43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
// RUN: %clang_cc1 -verify -std=c++1y %s
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namespace PR17846 {
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template <typename T> constexpr T pi = T(3.14);
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template <typename T> constexpr T tau = 2 * pi<T>;
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constexpr double tau_double = tau<double>;
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static_assert(tau_double == 6.28, "");
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}
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namespace PR17848 {
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template<typename T> constexpr T var = 12345;
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template<typename T> constexpr T f() { return var<T>; }
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constexpr int k = f<int>();
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static_assert(k == 12345, "");
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}
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namespace NonDependent {
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template<typename T> constexpr T a = 0;
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template<typename T> constexpr T b = a<int>;
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static_assert(b<int> == 0, "");
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}
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namespace InstantiationDependent {
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int f(int);
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void f(char);
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template<int> constexpr int a = 1;
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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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static_assert(b<int> == 1, "");
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static_assert(b<char> == 1, ""); // expected-note {{in instantiation of}} expected-error {{not an integral constant}}
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template<typename T> void f() {
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static_assert(a<sizeof(sizeof(f(T())))> == 0, ""); // expected-error {{static_assert failed}}
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}
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}
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namespace PR24483 {
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template<typename> struct A;
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template<typename... T> A<T...> models;
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template<> struct B models<>; // expected-error {{incomplete type 'struct B'}} expected-note {{forward declaration}}
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}
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