[PATCH] D123955: [C2x] Disallow functions without prototypes/functions with identifier lists

Erich Keane via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Mon Apr 18 12:25:47 PDT 2022

erichkeane added inline comments.

Comment at: clang/lib/AST/ASTContext.cpp:11243
   // We really shouldn't be making a no-proto type here.
+  if (ArgTypes.empty() && Variadic && !getLangOpts().StrictPrototypes)
How tough would it be to change this to represent always as a C++-esque `foo(...)` prototype, just always?

Comment at: clang/lib/Sema/SemaDecl.cpp:8821
         (!R->getAsAdjusted<FunctionType>() && R->isFunctionProtoType());
+    assert(SemaRef.getLangOpts().StrictPrototypes
+               ? HasPrototype
This assert is quite strange, particularly with the string part of it only in the 'else' of the conditional? It seems you're trying to ensure that:
"if strictProtoTypes, assert hasProtoType"?

In that case, I'd likely suggest:

`assert((HasProtoType || !SemeaRef.getLangOpts().StrictPrototypes) && "Strict prototypes are required");`

Comment at: clang/test/Parser/c2x-attributes.c:64
+                                      c2x-warning 2 {{type specifier missing, defaults to 'int'}} \
+                                      c2x-error {{expected ';' after top level declarator}} \
+                                      c2x-error {{expected identifier or '('}}
This is an unfortunate change in diagnostic quality.

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