Introduce a new expression type, UnresolvedDeclRefExpr, that describes
dependent qualified-ids such as
Fibonacci<N - 1>::value
where N is a template parameter. These references are "unresolved"
because the name is dependent and, therefore, cannot be resolved to a
declaration node (as we would do for a DeclRefExpr or
QualifiedDeclRefExpr). UnresolvedDeclRefExprs instantiate to
DeclRefExprs, QualifiedDeclRefExprs, etc.
Also, be a bit more careful about keeping only a single set of
specializations for a class template, and instantiating from the
definition of that template rather than a previous declaration. In
general, we need a better solution for this for all TagDecls, because
it's too easy to accidentally look at a declaration that isn't the
definition.
We can now process a simple Fibonacci computation described as a
template metaprogram.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67308 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclTemplate.cpp b/lib/AST/DeclTemplate.cpp
index ac76c25..7389b83 100644
--- a/lib/AST/DeclTemplate.cpp
+++ b/lib/AST/DeclTemplate.cpp
@@ -93,8 +93,31 @@
SourceLocation L,
DeclarationName Name,
TemplateParameterList *Params,
- NamedDecl *Decl) {
- return new (C) ClassTemplateDecl(DC, L, Name, Params, Decl);
+ NamedDecl *Decl,
+ ClassTemplateDecl *PrevDecl) {
+ Common *CommonPtr;
+ if (PrevDecl)
+ CommonPtr = PrevDecl->CommonPtr;
+ else
+ CommonPtr = new (C) Common;
+
+ return new (C) ClassTemplateDecl(DC, L, Name, Params, Decl, PrevDecl,
+ CommonPtr);
+}
+
+ClassTemplateDecl::~ClassTemplateDecl() {
+ assert(CommonPtr == 0 && "ClassTemplateDecl must be explicitly destroyed");
+}
+
+void ClassTemplateDecl::Destroy(ASTContext& C) {
+ if (!PreviousDeclaration) {
+ CommonPtr->~Common();
+ C.Deallocate((void*)CommonPtr);
+ }
+ CommonPtr = 0;
+
+ this->~ClassTemplateDecl();
+ C.Deallocate((void*)this);
}
//===----------------------------------------------------------------------===//