AST for @synchronized.

llvm-svn: 46524

clang/AST/Stmt.cpp

@@ -249,3 +249,13 @@ Stmt::child_iterator ObjCAtThrowStmt::child_begin() {
 Stmt::child_iterator ObjCAtThrowStmt::child_end() {
   return &Throw+1;
 }
+
+// ObjCAtSynchronizedStmt
+Stmt::child_iterator ObjCAtSynchronizedStmt::child_begin() {
+  return &SynchBody;
+}
+
+Stmt::child_iterator ObjCAtSynchronizedStmt::child_end() {
+  return &SynchBody+1;
+}
+

clang/AST/StmtSerialization.cpp

@@ -893,6 +893,20 @@ ObjCAtThrowStmt* ObjCAtThrowStmt::CreateImpl(Deserializer& D) {
   Stmt* Throw = D.ReadOwnedPtr<Stmt>();
   return new ObjCAtThrowStmt(L,Throw);  
 }
+
+void ObjCAtSynchronizedStmt::EmitImpl(Serializer& S) const {
+  S.Emit(AtSynchronizedLoc);
+  S.EmitOwnedPtr(SynchExpr);
+  S.EmitOwnedPtr(SynchBody);
+}
+
+ObjCAtSynchronizedStmt* ObjCAtSynchronizedStmt::CreateImpl(Deserializer& D) {
+  SourceLocation L = SourceLocation::ReadVal(D);
+  Expr *syncExpr = D.ReadOwnedPtr<Expr>();
+  Stmt *synchBody = D.ReadOwnedPtr<Stmt>();
+  ObjCAtSynchronizedStmt* stmt = new ObjCAtSynchronizedStmt(L,syncExpr,synchBody);
+  return stmt;
+}
   
 void ObjCAtTryStmt::EmitImpl(Serializer& S) const {
   S.Emit(AtTryLoc);

clang/Parse/ParseObjc.cpp

@@ -1113,7 +1113,27 @@ Parser::StmtResult Parser::ParseObjCThrowStmt(SourceLocation atLoc) {
 ///   @synchronized '(' expression ')'
 ///
 Parser::StmtResult Parser::ParseObjCSynchronizedStmt(SourceLocation atLoc) {
-  return 0;
+  ExprResult Res;
+  ConsumeToken(); // consume synchronized
+  if (Tok.isNot(tok::l_paren)) {
+    Diag (Tok, diag::err_expected_lparen_after, "@synchronized");
+    return true;
+  }
+  ConsumeParen();  // '('
+  Res = ParseExpression();
+  if (Res.isInvalid) {
+    SkipUntil(tok::semi);
+    return true;
+  }
+  if (Tok.isNot(tok::r_paren)) {
+    Diag (Tok, diag::err_expected_rparen);
+    return true;
+  }
+  ConsumeParen();  // ')'
+  StmtResult SynchBody = ParseCompoundStatementBody();
+  if (SynchBody.isInvalid)
+    SynchBody = Actions.ActOnNullStmt(Tok.getLocation());
+  return Actions.ActOnObjCAtSynchronizedStmt(atLoc, Res.Val, SynchBody.Val);
 }
 
 ///  objc-try-catch-statement:

clang/Sema/Sema.h

@@ -378,6 +378,9 @@ public:
   
   virtual StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, 
                                           StmtTy *Throw);
+  virtual StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 
+                                                 ExprTy *SynchExpr, 
+                                                 StmtTy *SynchBody);
   
   //===--------------------------------------------------------------------===//
   // Expression Parsing Callbacks: SemaExpr.cpp.

clang/Sema/SemaStmt.cpp

@@ -809,5 +809,12 @@ Sema::ActOnObjCAtThrowStmt(SourceLocation AtLoc, StmtTy *Throw) {
   return TS;
 }
 
+Action::StmtResult
+Sema::ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, ExprTy *SynchExpr, 
+                                  StmtTy *SynchBody) {
+  ObjCAtSynchronizedStmt *SS = new ObjCAtSynchronizedStmt(AtLoc, 
+    static_cast<Expr*>(SynchExpr), static_cast<Stmt*>(SynchBody));
+  return SS;
+}
 
 

clang/include/clang/AST/Stmt.h

@@ -992,6 +992,9 @@ public:
   }
   static bool classof(const ObjCAtSynchronizedStmt *) { return true; }
   
+  virtual child_iterator child_begin();
+  virtual child_iterator child_end();
+  
   virtual void EmitImpl(llvm::Serializer& S) const;
   static ObjCAtSynchronizedStmt* CreateImpl(llvm::Deserializer& D);
 };

clang/include/clang/Parse/Action.h

@@ -335,6 +335,12 @@ public:
     return 0;
   }
   
+  virtual StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 
+                                        ExprTy *SynchExpr, 
+                                        StmtTy *SynchBody) {
+    return 0;
+  }
+  
   //===--------------------------------------------------------------------===//
   // Expression Parsing Callbacks.
   //===--------------------------------------------------------------------===//