llvm-project/clang/test/CXX/dcl.dcl/dcl.attr
Bruno Ricci eb10b065f2
[clang] Pass the NamedDecl* instead of the DeclarationName into many diagnostics.
Background:
-----------
There are two related argument types which can be sent into a diagnostic to
display the name of an entity: DeclarationName (ak_declarationname) or
NamedDecl* (ak_nameddecl) (there is also ak_identifierinfo for
IdentifierInfo*, but we are not concerned with it here).

A DeclarationName in a diagnostic will just be streamed to the output,
which will directly result in a call to DeclarationName::print.

A NamedDecl* in a diagnostic will also ultimately result in a call to
DeclarationName::print, but with two customisation points along the way:

The first customisation point is NamedDecl::getNameForDiagnostic which is
overloaded by FunctionDecl, ClassTemplateSpecializationDecl and
VarTemplateSpecializationDecl to print the template arguments, if any.

The second customisation point is NamedDecl::printName. By default it just
streams the stored DeclarationName into the output but it can be customised
to provide a user-friendly name for an entity. It is currently overloaded by
DecompositionDecl and MSGuidDecl.

What this patch does:
---------------------
For many diagnostics a DeclarationName is used instead of the NamedDecl*.
This bypasses the two customisation points mentioned above. This patches fix
this for diagnostics in Sema.cpp, SemaCast.cpp, SemaChecking.cpp, SemaDecl.cpp,
SemaDeclAttr.cpp, SemaDecl.cpp, SemaOverload.cpp and SemaStmt.cpp.

I have only modified diagnostics where I could construct a test-case which
demonstrates that the change is appropriate (either with this patch or the next
one).

Reviewed By: erichkeane, aaron.ballman

Differential Revision: https://reviews.llvm.org/D84656
2020-07-28 10:30:35 +01:00
..
dcl.align Add a triple to this test so it passes for targets where alignof(double) 2019-01-24 20:52:56 +00:00
dcl.attr.depend
dcl.attr.deprecated
dcl.attr.fallthrough
dcl.attr.grammar
dcl.attr.nodiscard Disallow [[nodiscard]] on a function pointer declaration. 2020-04-16 09:28:49 -04:00
dcl.attr.noreturn [clang] Pass the NamedDecl* instead of the DeclarationName into many diagnostics. 2020-07-28 10:30:35 +01:00
dcl.attr.unused Do not warn on switches over enums that do not use [[maybe_unused]] enumerators 2019-05-02 16:30:49 +00:00