Make TemplateArgumentListBuilder take an ASTContext (because we're probably going to need it later). Move push_back to the .cpp file. If the passed in template argument is a type, assert that it's canonical.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72918 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclTemplate.cpp b/lib/AST/DeclTemplate.cpp
index fbaaf4d..11b9275 100644
--- a/lib/AST/DeclTemplate.cpp
+++ b/lib/AST/DeclTemplate.cpp
@@ -236,6 +236,19 @@
 }
 
 //===----------------------------------------------------------------------===//
+// TemplateArgumentListBuilder Implementation
+//===----------------------------------------------------------------------===//
+void TemplateArgumentListBuilder::push_back(const TemplateArgument& Arg) {
+  switch (Arg.getKind()) {
+  case TemplateArgument::Type:
+    assert(Arg.getAsType()->isCanonical() && "Type must be canonical!");
+    break;
+  }
+  
+  Args.push_back(Arg);
+}
+
+//===----------------------------------------------------------------------===//
 // TemplateArgumentList Implementation
 //===----------------------------------------------------------------------===//
 TemplateArgumentList::TemplateArgumentList(ASTContext &Context,