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Check that the namespace alias doesn't conflict with a previous declaration in this scope.

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llvm-svn: 67921
This commit is contained in:
Anders Carlsson
2009-03-28 06:23:46 +00:00
parent 2f14ce0a74
commit dca83c4676
2 changed files with 24 additions and 1 deletions
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14
clang/lib/Sema/SemaDeclCXX.cpp
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@@ -1675,12 +1675,24 @@ void Sema::PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir) {
S->PushUsingDirective(UDir);
}
Sema::DeclTy *Sema::ActOnNamespaceAliasDef(Scope *CurScope,
Sema::DeclTy *Sema::ActOnNamespaceAliasDef(Scope *S,
SourceLocation AliasLoc,
IdentifierInfo *Alias,
const CXXScopeSpec &SS,
SourceLocation NamespaceLoc,
IdentifierInfo *NamespaceName) {
// Check if we have a previous declaration with the same name.
if (NamedDecl *PrevDecl = LookupName(S, Alias, LookupOrdinaryName)) {
// FIXME: If this is a namespace alias decl, and it points to the same
// namespace, we shouldn't warn.
unsigned DiagID = isa<NamespaceDecl>(PrevDecl) ? diag::err_redefinition :
diag::err_redefinition_different_kind;
Diag(AliasLoc, DiagID) << Alias;
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
return 0;
}
return 0;
}

11
clang/test/SemaCXX/namespace-alias.cpp Normal file
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@@ -0,0 +1,11 @@
// RUN: clang-cc -fsyntax-only -verify %s
namespace N { };
namespace A = N;
int B; // expected-note {{previous definition is here}}
namespace B = N; // expected-error {{redefinition of 'B' as different kind of symbol}}
namespace C { } // expected-note {{previous definition is here}}
namespace C = N; // expected-error {{redefinition of 'C'}}