Generalize printing of nested-name-specifier sequences for use in both

QualifiedNameType and QualifiedDeclRefExpr. We now keep track of the
exact nested-name-specifier spelling for a QualifiedDeclRefExpr, and
use that spelling when printing ASTs. This fixes PR3493.

llvm-svn: 67283

1 files changed, 25 insertions, 0 deletions

diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index 1d4a3ba3a63..f18a2888470 100644
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -24,6 +24,31 @@ void CXXConditionDeclExpr::Destroy(ASTContext& C) {
   C.Deallocate(this);
 }
 
+QualifiedDeclRefExpr::QualifiedDeclRefExpr(NamedDecl *d, QualType t, 
+                                           SourceLocation l, bool TD, 
+                                           bool VD, SourceRange R,
+                                       const NestedNameSpecifier *Components,
+                                           unsigned NumComponents)
+  : DeclRefExpr(QualifiedDeclRefExprClass, d, t, l, TD, VD), 
+    QualifierRange(R), NumComponents(NumComponents) {
+  NestedNameSpecifier *Data 
+    = reinterpret_cast<NestedNameSpecifier *>(this + 1);
+  for (unsigned I = 0; I < NumComponents; ++I)
+    Data[I] = Components[I];
+}
+
+QualifiedDeclRefExpr *
+QualifiedDeclRefExpr::Create(ASTContext &Context, NamedDecl *d, QualType t, 
+                             SourceLocation l, bool TD, 
+                             bool VD, SourceRange R,
+                             const NestedNameSpecifier *Components,
+                             unsigned NumComponents) {
+  void *Mem = Context.Allocate((sizeof(QualifiedDeclRefExpr) +
+                                sizeof(NestedNameSpecifier) * NumComponents));
+  return new (Mem) QualifiedDeclRefExpr(d, t, l, TD, VD, R, Components, 
+                                        NumComponents);
+}
+
 //===----------------------------------------------------------------------===//
 //  Child Iterators for iterating over subexpressions/substatements
 //===----------------------------------------------------------------------===//