From: Anders Carlsson <andersca@mac.com>
Date: Wed, 6 May 2009 04:46:28 +0000 (+0000)
Subject: Add parsing of friend specifiers.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f47f7a1c4082b42b21f1c7dc211ff90f4b38258a;p=clang

Add parsing of friend specifiers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71067 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Parse/DeclSpec.h b/include/clang/Parse/DeclSpec.h
index e97c20f2d1..fad3f1e676 100644
--- a/include/clang/Parse/DeclSpec.h
+++ b/include/clang/Parse/DeclSpec.h
@@ -123,6 +123,9 @@ private:
   bool FS_virtual_specified : 1;
   bool FS_explicit_specified : 1;
   
+  // friend-specifier
+  bool Friend_specified : 1;
+  
   /// TypeRep - This contains action-specific information about a specific TST.
   /// For example, for a typedef or struct, it might contain the declaration for
   /// these.
@@ -145,6 +148,7 @@ private:
   SourceLocation TSWLoc, TSCLoc, TSSLoc, TSTLoc;
   SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc;
   SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc;
+  SourceLocation FriendLoc;
   
   bool BadSpecifier(TST T, const char *&PrevSpec);
   bool BadSpecifier(TQ T, const char *&PrevSpec);
@@ -168,6 +172,7 @@ public:
       FS_inline_specified(false),
       FS_virtual_specified(false),
       FS_explicit_specified(false),
+      Friend_specified(false),
       TypeRep(0),
       AttrList(0),
       ProtocolQualifiers(0),
@@ -277,6 +282,8 @@ public:
   bool SetFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec);
   bool SetFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec);
   
+  bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec);
+  
   /// AddAttributes - contatenates two attribute lists. 
   /// The GCC attribute syntax allows for the following:
   ///
diff --git a/lib/Parse/DeclSpec.cpp b/lib/Parse/DeclSpec.cpp
index d742ef2ed0..e592deecd0 100644
--- a/lib/Parse/DeclSpec.cpp
+++ b/lib/Parse/DeclSpec.cpp
@@ -294,6 +294,16 @@ bool DeclSpec::SetFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec
   return false;
 }
 
+bool DeclSpec::SetFriendSpec(SourceLocation Loc, const char *&PrevSpec) {
+  if (Friend_specified) {
+    PrevSpec = "friend";
+    return true;
+  }
+  
+  Friend_specified = true;
+  FriendLoc = Loc;
+  return false;
+}
 
 /// Finish - This does final analysis of the declspec, rejecting things like
 /// "_Imaginary" (lacking an FP type).  This returns a diagnostic to issue or
diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 8b81c312d2..b3c2d8c555 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -597,6 +597,8 @@ bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
 /// [C99]   'inline'
 /// [C++]   'virtual'
 /// [C++]   'explicit'
+///       'friend': [C++ dcl.friend]
+
 ///
 void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
                                         TemplateParameterLists *TemplateParams,
@@ -846,6 +848,11 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
       isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec);
       break;
 
+    // friend
+    case tok::kw_friend:
+      isInvalid = DS.SetFriendSpec(Loc, PrevSpec);
+      break;
+          
     // type-specifier
     case tok::kw_short:
       isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec);
diff --git a/test/Parser/cxx-friend.cpp b/test/Parser/cxx-friend.cpp
new file mode 100644
index 0000000000..5bfaf2fdbc
--- /dev/null
+++ b/test/Parser/cxx-friend.cpp
@@ -0,0 +1,5 @@
+// RUN: clang-cc -fsyntax-only %s
+
+class C {
+  friend class D;
+};