ca68f3bc48
The following was found by a customer and is accepted by the other primary
C++ compilers, but fails to compile in Clang:
namespace sss {
double foo(int, double);
template <class T>
T foo(T); // note: target of using declaration
} // namespace sss
namespace oad {
void foo();
}
namespace oad {
using ::sss::foo;
}
namespace sss {
using oad::foo; // note: using declaration
}
namespace sss {
double foo(int, double) { return 0; }
template <class T>
T foo(T t) { // error: declaration conflicts with target of using
return t;
}
} // namespace sss
I believe the issue is that MergeFunctionDecl() was calling
checkUsingShadowRedecl() but only considering a FunctionDecl as a
possible shadow and not FunctionTemplateDecl. The changes in this patch
largely mirror how variable declarations were being handled by also
catching FunctionTemplateDecl.
55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
// RUN: %clang_cc1 -fmodules-ts -verify -std=c++17 %s
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// RUN: %clang_cc1 -fmodules-ts -verify -std=c++17 %s -DEXPORT
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// RUN: %clang_cc1 -fmodules-ts -verify -std=c++17 %s -DUSING
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#ifndef NO_GLOBAL
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extern int var; // expected-note {{previous declaration is here}}
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int func(); // expected-note {{previous declaration is here}}
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struct str; // expected-note {{previous declaration is here}}
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using type = int;
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template<typename> extern int var_tpl; // expected-note {{previous declaration is here}}
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template<typename> int func_tpl(); // expected-note {{previous declaration is here}}
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template<typename> struct str_tpl; // expected-note {{previous declaration is here}}
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template<typename> using type_tpl = int; // expected-note {{previous declaration is here}}
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typedef int type;
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namespace ns { using ::func; }
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namespace ns_alias = ns;
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#endif
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export module M;
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#ifdef USING
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using ::var;
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using ::func;
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using ::str;
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using ::type;
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using ::var_tpl;
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using ::func_tpl;
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using ::str_tpl;
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using ::type_tpl;
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#endif
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#ifdef EXPORT
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export {
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#endif
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extern int var; // expected-error {{declaration of 'var' in module M follows declaration in the global module}}
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int func(); // expected-error {{declaration of 'func' in module M follows declaration in the global module}}
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struct str; // expected-error {{declaration of 'str' in module M follows declaration in the global module}}
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using type = int;
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template<typename> extern int var_tpl; // expected-error {{declaration of 'var_tpl' in module M follows declaration in the global module}}
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template<typename> int func_tpl(); // expected-error {{declaration of 'func_tpl' in module M follows declaration in the global module}}
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template<typename> struct str_tpl; // expected-error {{declaration of 'str_tpl' in module M follows declaration in the global module}}
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template<typename> using type_tpl = int; // expected-error {{declaration of 'type_tpl' in module M follows declaration in the global module}}
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typedef int type;
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namespace ns { using ::func; }
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namespace ns_alias = ns;
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#ifdef EXPORT
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}
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#endif
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