llvm-project/export-redecl-in-language-linkage.cppm at 275bcd02380fb3bd40b747ed320fcac266b971bc - llvm-project - shylie's gitea

shylie/llvm-project

Chuanqi Xu e0d66c2424 [C++20] [Modules] Allow export redeclarations within language linkage

Close https://github.com/llvm/llvm-project/issues/98583

Currently, clang will reject the following code:

```
export module mod;
extern "C++" void func();
export extern "C++" {
    void func();
}
```

while both MSVC and GCC accept it. Although clang's behavior matches the
current wording, from the discussion, the consensus is that we should
accept the above example from the intention. Since the intention to not
allow export redeclaration which is not exported is to make the linkage
clear. But it doesn't matter with the declarations within global module.

2024-07-12 13:55:56 +08:00

9 lines

169 B

C++

Raw Blame History

 // RUN: %clang_cc1 -std=c++20 %s -verify -fsyntax-only
 // expected-no-diagnostics
 export module mod;
 extern "C++" void func();
 export extern "C++" {
     void func();
 }