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a2772fc806
Currently, the use of preferred_name would block implementing std modules in libcxx. See https://github.com/llvm/llvm-project/issues/56490 for example. The problem is pretty hard and it looks like we couldn't solve it in a short time. So we sent this patch as a workaround to avoid blocking us to modularize STL. This is intended to be fixed properly in the future. Reviewed By: erichkeane, aaron.ballman, tahonermann Differential Revision: https://reviews.llvm.org/D130331
51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
// Tests that the ODR check wouldn't produce false-positive result for preferred_name attribute.
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//
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// RUN: rm -rf %t
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// RUN: mkdir -p %t
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// RUN: split-file %s %t
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//
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// RUN: %clang_cc1 -std=c++20 %t/A.cppm -emit-module-interface -o %t/A.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use.cppm -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use1.cpp -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use2.cpp -verify -fsyntax-only
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//
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//--- foo.h
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template<class _CharT>
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class foo_templ;
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typedef foo_templ<char> foo;
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template<class _CharT>
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class
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__attribute__((__preferred_name__(foo)))
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foo_templ {
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public:
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foo_templ() {}
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};
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inline foo_templ<char> bar()
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{
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return foo_templ<char>();
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}
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//--- A.cppm
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module;
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#include "foo.h"
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export module A;
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//--- Use.cppm
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// expected-no-diagnostics
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module;
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#include "foo.h"
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export module Use;
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import A;
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//--- Use1.cpp
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import A; // expected-warning@foo.h:8 {{attribute declaration must precede definition}}
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#include "foo.h" // expected-note@foo.h:9 {{previous definition is here}}
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//--- Use2.cpp
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// expected-no-diagnostics
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#include "foo.h"
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import A;
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