Fix a crashing but trying to print a TemplateTemplateParmDecl

for code like this:
   template<template<typename T> class U> class V {};

The problem is that the DeclPrinter assumed all TemplateDecls
have a getTemplatedClass(), but template template params don't
(so we got a NULL dereference).  The solution is to detect if
we're a template template param, and construct the template
class name ('class U') specially in this case.

OKed by dgregor and chandlerc

llvm-svn: 108007

1 files changed, 5 insertions, 1 deletions

diff --git a/clang/lib/AST/DeclPrinter.cpp b/clang/lib/AST/DeclPrinter.cpp
index c4378949760..765772dd13f 100644
--- a/clang/lib/AST/DeclPrinter.cpp
+++ b/clang/lib/AST/DeclPrinter.cpp
@@ -654,7 +654,11 @@ void DeclPrinter::VisitTemplateDecl(TemplateDecl *D) {
 
   Out << "> ";
 
-  Visit(D->getTemplatedDecl());
+  if (isa<TemplateTemplateParmDecl>(D)) {
+    Out << "class " << D->getName();
+  } else {
+    Visit(D->getTemplatedDecl());
+  }
 }
 
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