'constexpr' and 'friend' are both declaration specifiers. Teach the parser this, for better error recovery.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166645 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 9 insertions, 4 deletions

diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 26175a50f5..bb5f333749 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -3771,6 +3771,9 @@ bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
   case tok::kw_virtual:
   case tok::kw_explicit:
 
+    // friend keyword.
+  case tok::kw_friend:
+
     // static_assert-declaration
   case tok::kw__Static_assert:
 
@@ -3779,11 +3782,10 @@ bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
 
     // GNU attributes.
   case tok::kw___attribute:
-    return true;
 
-    // C++0x decltype.
+    // C++11 decltype and constexpr.
   case tok::annot_decltype:
-    return true;
+  case tok::kw_constexpr:
 
     // C11 _Atomic()
   case tok::kw__Atomic:
diff --git a/test/Parser/recovery.cpp b/test/Parser/recovery.cpp
index ff687583c2..784002d536 100644
--- a/test/Parser/recovery.cpp
+++ b/test/Parser/recovery.cpp
@@ -23,12 +23,15 @@ void g() {
 struct S {
   int a, b, c;
   S();
+  int x // expected-error {{expected ';'}}
+  friend void f()
 };
 8S::S() : a{ 5 }, b{ 6 }, c{ 2 } { // expected-error {{unqualified-id}}
   return;
 }
 int k;
-int l = k;
+int l = k // expected-error {{expected ';'}}
+constexpr int foo();
 
 5int m = { l }, n = m; // expected-error {{unqualified-id}}