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// RUN: rm -rf %t
// RUN: mkdir %t
// RUN: split-file %s %t
//
// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/var_def.cppm -o %t/var_def.pcm
// RUN: %clang_cc1 -std=c++20 -emit-module-interface -fprebuilt-module-path=%t %t/reexport1.cppm -o %t/reexport1.pcm
// RUN: %clang_cc1 -std=c++20 -emit-module-interface -fprebuilt-module-path=%t %t/reexport2.cppm -o %t/reexport2.pcm
// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/use.cppm -fsyntax-only -verify
// RUN: %clang_cc1 -std=c++20 -emit-reduced-module-interface %t/var_def.cppm -o %t/var_def.pcm
// RUN: %clang_cc1 -std=c++20 -emit-reduced-module-interface -fprebuilt-module-path=%t %t/reexport1.cppm -o %t/reexport1.pcm
// RUN: %clang_cc1 -std=c++20 -emit-reduced-module-interface -fprebuilt-module-path=%t %t/reexport2.cppm -o %t/reexport2.pcm
// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/use.cppm -fsyntax-only -verify
//--- use.cppm
import reexport1;
import reexport2;
auto foo = zero<Int>;
auto bar = zero<int*>;
auto baz = zero<int>;
template <class T> constexpr T zero = 0; // expected-error-re {{declaration{{.*}}in the global module follows declaration in module var_def}}
// expected-note@* {{previous}}
template <> constexpr Int zero<Int> = {0}; // expected-error-re {{declaration{{.*}}in the global module follows declaration in module var_def}}
// expected-note@* {{previous}}
template <class T> constexpr T* zero<T*> = nullptr; // expected-error-re {{declaration{{.*}}in the global module follows declaration in module var_def}}
// expected-note@* {{previous}}
template <> constexpr int** zero<int**> = nullptr; // ok, new specialization.
template <class T> constexpr T** zero<T**> = nullptr; // ok, new partial specilization.
//--- var_def.cppm
export module var_def;
export template <class T> constexpr T zero = 0;
export struct Int {
int value;
};
export template <> constexpr Int zero<Int> = {0};
export template <class T> constexpr T* zero<T*> = nullptr;
//--- reexport1.cppm
export module reexport1;
export import var_def;
//--- reexport2.cppm
export module reexport2;
export import var_def;
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