[clang][ASTMatchers] global anonymous union declaration not picked up by ASTConsumer::handleTopLevelDecl

[carlosgalvezp]

Hi,

I'm trying to solve an issue with a clang-tidy check on the following example code:

static union {
  int global;
};

Clearly this shows up in the AST as a CXXRecordDecl under the TranslationUnitDecl: https://godbolt.org/z/j8GqxvEYd

For debugging, I am overriding the ASTConsumer::HandleTopLevelDecl function in MatchASTConsumer, and I am just simply dumping the Decls that get picked up by it.

I notice that this CXXRecordDecl of the union is not picked up by this function.

Is this intentional? Why are global anonymous unions not registered as a "top level declaration"?

Thanks!

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Carlos Galvez (carlosgalvezp)

Hi,

I'm trying to solve an issue with a clang-tidy check on the following example code:

static union {
  int global;
};

Clearly this shows up in the AST as a CXXRecordDecl under the TranslationUnitDecl: https://godbolt.org/z/j8GqxvEYd

For debugging, I am overriding the ASTConsumer::HandleTopLevelDecl function in MatchASTConsumer, and I am just simply dumping the Decls that get picked up by it.

I notice that this CXXRecordDecl of the union is not picked up by this function.

Is this intentional? Why are global anonymous unions not registered as a "top level declaration"?

Thanks!