Parsing and AST support for using declarations, from John Thompson!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73812 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 8c547cd..7524cbf 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -1748,6 +1748,43 @@
S->PushUsingDirective(DeclPtrTy::make(UDir));
}
+
+Sema::DeclPtrTy Sema::ActOnUsingDeclaration(Scope *S,
+ SourceLocation UsingLoc,
+ const CXXScopeSpec &SS,
+ SourceLocation IdentLoc,
+ IdentifierInfo *TargetName,
+ AttributeList *AttrList,
+ bool IsTypeName) {
+ assert(!SS.isInvalid() && "Invalid CXXScopeSpec.");
+ assert(TargetName && "Invalid TargetName.");
+ assert(IdentLoc.isValid() && "Invalid TargetName location.");
+ assert(S->getFlags() & Scope::DeclScope && "Invalid Scope.");
+
+ UsingDecl *UsingAlias = 0;
+
+ // Lookup target name.
+ LookupResult R = LookupParsedName(S, &SS, TargetName,
+ LookupOrdinaryName, false);
+
+ if (NamedDecl *NS = R) {
+ if (IsTypeName && !isa<TypeDecl>(NS)) {
+ Diag(IdentLoc, diag::err_using_typename_non_type);
+ }
+ UsingAlias = UsingDecl::Create(Context, CurContext, IdentLoc, SS.getRange(),
+ NS->getLocation(), UsingLoc, NS,
+ static_cast<NestedNameSpecifier *>(SS.getScopeRep()),
+ IsTypeName);
+ PushOnScopeChains(UsingAlias, S);
+ } else {
+ Diag(IdentLoc, diag::err_using_requires_qualname) << SS.getRange();
+ }
+
+ // FIXME: We ignore attributes for now.
+ delete AttrList;
+ return DeclPtrTy::make(UsingAlias);
+}
+
/// getNamespaceDecl - Returns the namespace a decl represents. If the decl
/// is a namespace alias, returns the namespace it points to.
static inline NamespaceDecl *getNamespaceDecl(NamedDecl *D) {