1 files changed, 36 insertions, 10 deletions

diff --git a/clang/lib/AST/DeclPrinter.cpp b/clang/lib/AST/DeclPrinter.cpp
index 36c5d10f718..78a7afdbf09 100644
--- a/clang/lib/AST/DeclPrinter.cpp
+++ b/clang/lib/AST/DeclPrinter.cpp
@@ -15,6 +15,7 @@
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclObjC.h"
+#include "clang/AST/DeclTemplate.h"
 #include "clang/AST/DeclVisitor.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
@@ -105,7 +106,8 @@ namespace {
     void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
     void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
 
-    void printTemplateParameters(const TemplateParameterList *Params);
+    void printTemplateParameters(const TemplateParameterList *Params,
+                                 bool OmitTemplateKW = false);
     void printTemplateArguments(const TemplateArgumentList &Args,
                                 const TemplateParameterList *Params = nullptr);
     void prettyPrintAttributes(Decl *D);
@@ -126,6 +128,18 @@ void Decl::print(raw_ostream &Out, const PrintingPolicy &Policy,
   Printer.Visit(const_cast<Decl*>(this));
 }
 
+void TemplateParameterList::print(raw_ostream &Out, const ASTContext &Context,
+                                  bool OmitTemplateKW) const {
+  print(Out, Context, Context.getPrintingPolicy(), OmitTemplateKW);
+}
+
+void TemplateParameterList::print(raw_ostream &Out, const ASTContext &Context,
+                                  const PrintingPolicy &Policy,
+                                  bool OmitTemplateKW) const {
+  DeclPrinter Printer(Out, Policy, Context);
+  Printer.printTemplateParameters(this, OmitTemplateKW);
+}
+
 static QualType GetBaseType(QualType T) {
   // FIXME: This should be on the Type class!
   QualType BaseType = T;
@@ -1002,25 +1016,35 @@ void DeclPrinter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
     Visit(*D->decls_begin());
 }
 
-void DeclPrinter::printTemplateParameters(const TemplateParameterList *Params) {
+void DeclPrinter::printTemplateParameters(const TemplateParameterList *Params,
+                                          bool OmitTemplateKW) {
   assert(Params);
 
-  Out << "template <";
+  if (!OmitTemplateKW)
+    Out << "template ";
+  Out << '<';
 
-  for (unsigned i = 0, e = Params->size(); i != e; ++i) {
-    if (i != 0)
+  bool NeedComma = false;
+  for (const Decl *Param : *Params) {
+    if (Param->isImplicit())
+      continue;
+
+    if (NeedComma)
       Out << ", ";
+    else
+      NeedComma = true;
 
-    const Decl *Param = Params->getParam(i);
     if (auto TTP = dyn_cast<TemplateTypeParmDecl>(Param)) {
 
       if (TTP->wasDeclaredWithTypename())
-        Out << "typename ";
+        Out << "typename";
       else
-        Out << "class ";
+        Out << "class";
 
       if (TTP->isParameterPack())
-        Out << "...";
+        Out << " ...";
+      else if (!TTP->getName().empty())
+        Out << ' ';
 
       Out << *TTP;
 
@@ -1045,7 +1069,9 @@ void DeclPrinter::printTemplateParameters(const TemplateParameterList *Params) {
     }
   }
 
-  Out << "> ";
+  Out << '>';
+  if (!OmitTemplateKW)
+    Out << ' ';
 }
 
 void DeclPrinter::printTemplateArguments(const TemplateArgumentList &Args,