================
@@ -704,6 +704,15 @@ ItaniumMangleContextImpl::getEffectiveDeclContext(const
Decl *D) {
return D->getLexicalDeclContext()->getRedeclContext();
}
+ if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(D)) {
+ // Member-like constrained friends are mangled as if they were members of
+ // the enclosing class.
+ if (FTD->getTemplatedDecl()->isMemberLikeConstrainedFriend() &&
+ getASTContext().getLangOpts().getClangABICompat() >
+ LangOptions::ClangABI::Ver19)
+ return D->getLexicalDeclContext()->getRedeclContext();
----------------
zygoloid wrote:
We have maintained more burdensome things for ABI compatibility for longer. I
don't think we have a policy for removing old ABI things, but some Clang users
depend on setting the ABI compat back quite a long way. Establishing a policy
seems like a good idea.
https://github.com/llvm/llvm-project/pull/110503
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