[clang] [Clang] diagnose deleted/default redeclaration of defined friend functions (PR #136717)

[Oleksandr T. via cfe-commits]

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@@ -142,6 +142,13 @@ NamedDecl *Parser::ParseCXXInlineMethodDef(
       SkipUntil(tok::semi);
     }
 
+    Decl *PrevDecl = FnD->getPreviousDecl();
+    if (PrevDecl && isa<FunctionDecl>(PrevDecl) &&
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a-tarasyuk wrote:

@zwuis thanks 

https://github.com/llvm/llvm-project/pull/136717