From 39c59a88877d1e742a25d707cf373187bcf9a1af Mon Sep 17 00:00:00 2001 From: Ted Kremenek Date: Fri, 25 Jul 2008 04:39:19 +0000 Subject: Implemented Sema support for attribute "unused". llvm-svn: 54008 --- clang/lib/Sema/SemaDeclAttr.cpp | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'clang/lib/Sema') diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp index 04e3f0557b7..9a38f6cf351 100644 --- a/clang/lib/Sema/SemaDeclAttr.cpp +++ b/clang/lib/Sema/SemaDeclAttr.cpp @@ -339,6 +339,25 @@ static void HandleNoReturnAttr(Decl *d, const AttributeList &Attr, Sema &S) { d->addAttr(new NoReturnAttr()); } +static void HandleUnusedAttr(Decl *d, const AttributeList &Attr, Sema &S) { + // check the attribute arguments. + if (Attr.getNumArgs() != 0) { + S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments, + std::string("0")); + return; + } + + VarDecl *VD = dyn_cast(d); + + if (!VD) { + S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type, + "unused", "variable"); + return; + } + + d->addAttr(new UnusedAttr()); +} + static void HandleDeprecatedAttr(Decl *d, const AttributeList &Attr, Sema &S) { // check the attribute arguments. if (Attr.getNumArgs() != 0) { @@ -826,6 +845,7 @@ static void ProcessDeclAttribute(Decl *D, const AttributeList &Attr, Sema &S) { case AttributeList::AT_format: HandleFormatAttr (D, Attr, S); break; case AttributeList::AT_IBOutlet: HandleIBOutletAttr (D, Attr, S); break; case AttributeList::AT_nonnull: HandleNonNullAttr (D, Attr, S); break; + case AttributeList::AT_unused: HandleUnusedAttr (D, Attr, S); break; case AttributeList::AT_transparent_union: HandleTransparentUnionAttr(D, Attr, S); break; -- cgit v1.2.3