More static_assert work. Check that the assert expr is valid and show an error if it's false. Create the declaration and add it to the current context.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66995 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index 4776ce5..fd90083 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -13,6 +13,7 @@
 
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/ASTContext.h"
+#include "clang/AST/Expr.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "llvm/ADT/STLExtras.h"
 using namespace clang;
@@ -339,3 +340,19 @@
                                     Used, CommonAncestor);
 }
 
+StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
+                                           SourceLocation L, Expr *AssertExpr,
+                                           StringLiteral *Message) {
+  return new (C) StaticAssertDecl(DC, L, AssertExpr, Message);
+}
+
+void StaticAssertDecl::Destroy(ASTContext& C) {
+  AssertExpr->Destroy(C);
+  Message->Destroy(C);
+  this->~StaticAssertDecl();
+  C.Deallocate((void *)this);
+}
+
+StaticAssertDecl::~StaticAssertDecl() {
+}
+