cxx1y-variable-templates.cpp
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// No PCH:
// RUN: %clang_cc1 -pedantic -std=c++1y -include %s -include %s -verify %s -DNONPCH
// RUN: %clang_cc1 -pedantic -std=c++1y -include %s -include %s -verify %s -DNONPCH -DERROR
//
// With PCH:
// RUN: %clang_cc1 -pedantic -std=c++1y -emit-pch %s -o %t.a -DHEADER1
// RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.a -emit-pch %s -o %t.b -DHEADER2
// RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.b -verify %s -DHEADERUSE
// RUN: %clang_cc1 -pedantic -std=c++1y -emit-pch -fpch-instantiate-templates %s -o %t.a -DHEADER1
// RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.a -emit-pch -fpch-instantiate-templates %s -o %t.b -DHEADER2
// RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.b -verify %s -DHEADERUSE
#ifndef ERROR
// expected-no-diagnostics
#endif
#ifdef NONPCH
#if !defined(HEADER1)
#define HEADER1
#undef HEADER2
#undef HEADERUSE
#elif !defined(HEADER2)
#define HEADER2
#undef HEADERUSE
#else
#define HEADERUSE
#undef HEADER1
#undef HEADER2
#endif
#endif
// *** HEADER1: First header file
#if defined(HEADER1) && !defined(HEADER2) && !defined(HEADERUSE)
template<typename T> T var0a = T();
template<typename T> extern T var0b;
namespace join {
template<typename T> T va = T(100);
template<typename T> extern T vb;
namespace diff_types {
#ifdef ERROR
template<typename T> extern float err0;
template<typename T> extern T err1;
#endif
template<typename T> extern T def;
}
}
namespace spec {
template<typename T> constexpr T va = T(10);
template<> constexpr float va<float> = 1.5;
template constexpr int va<int>;
template<typename T> T vb = T();
template<> constexpr float vb<float> = 1.5;
template<typename T> T vc = T();
template<typename T> constexpr T vd = T(10);
template<typename T> T* vd<T*> = new T();
}
namespace spec_join1 {
template<typename T> T va = T(10);
template<> extern float va<float>;
extern template int va<int>;
template<typename T> T vb = T(10);
template<> extern float vb<float>;
template<typename T> T vc = T(10);
template<typename T> T vd = T(10);
template<typename T> extern T* vd<T*>;
}
#endif
// *** HEADER2: Second header file -- including HEADER1
#if defined(HEADER2) && !defined(HEADERUSE)
namespace join {
template<typename T> extern T va;
template<> constexpr float va<float> = 2.5;
template<typename T> T vb = T(100);
namespace diff_types {
#ifdef ERROR
template<typename T> extern T err0; // expected-error {{redeclaration of 'err0' with a different type: 'T' vs 'float'}} // expected-note@46 {{previous declaration is here}}
template<typename T> extern float err1; // expected-error {{redeclaration of 'err1' with a different type: 'float' vs 'T'}} // expected-note@47 {{previous declaration is here}}
#endif
template<typename T> extern T def;
}
}
namespace spec_join1 {
template<typename T> extern T va;
template<> float va<float> = 1.5;
extern template int va<int>;
template<> float vb<float> = 1.5;
template int vb<int>;
template<> float vc<float> = 1.5;
template int vc<int>;
template<typename T> extern T vd;
template<typename T> T* vd<T*> = new T();
}
#endif
// *** HEADERUSE: File using both header files -- including HEADER2
#ifdef HEADERUSE
template int var0a<int>;
float fvara = var0a<float>;
template<typename T> extern T var0a;
template<typename T> T var0b = T();
template int var0b<int>;
float fvarb = var0b<float>;
namespace join {
template const int va<const int>;
template<> const int va<int> = 50;
static_assert(va<float> == 2.5, "");
static_assert(va<int> == 50, "");
template<> constexpr float vb<float> = 2.5;
template const int vb<const int>;
static_assert(vb<float> == 2.5, "");
static_assert(vb<const int> == 100, "");
namespace diff_types {
template<typename T> T def = T();
}
}
namespace spec {
static_assert(va<float> == 1.5, "");
static_assert(va<int> == 10, "");
template<typename T> T* vb<T*> = new T();
int* intpb = vb<int*>;
static_assert(vb<float> == 1.5, "");
template<typename T> T* vc<T*> = new T();
template<> constexpr float vc<float> = 1.5;
int* intpc = vc<int*>;
static_assert(vc<float> == 1.5, "");
char* intpd = vd<char*>;
}
namespace spec_join1 {
template int va<int>;
int a = va<int>;
template<typename T> extern T vb;
int b = vb<int>;
int* intpb = vd<int*>;
}
#endif