Replaces LongJump with LongJumpScope.

runtime/vm/parser.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/parser.h"
 
 #include "lib/invocation_mirror.h"
 #include "platform/utils.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
@@ skipping 699 matching lines @@
     Parser parser(script, lib, cls.token_pos());
     parser.ParseClassDefinition(cls);
   }
 }
 
 
 RawObject* Parser::ParseFunctionParameters(const Function& func) {
   ASSERT(!func.IsNull());
   Isolate* isolate = Isolate::Current();
   StackZone zone(isolate);
-  LongJump* base = isolate->long_jump_base();
-  LongJump jump;
-  isolate->set_long_jump_base(&jump);
+  LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     const Script& script = Script::Handle(isolate, func.script());
     const Class& owner = Class::Handle(isolate, func.Owner());
     ASSERT(!owner.IsNull());
     ParsedFunction* parsed_function = new ParsedFunction(
         Function::ZoneHandle(func.raw()));
     Parser parser(script, parsed_function, func.token_pos());
     parser.SkipFunctionPreamble();
     ParamList params;
     parser.ParseFormalParameterList(true, true, &params);
     ParamDesc* param = params.parameters->data();
     const int param_cnt = params.num_fixed_parameters +
                           params.num_optional_parameters;
     const Array& param_descriptor =
         Array::Handle(Array::New(param_cnt * kParameterEntrySize));
     for (int i = 0, j = 0; i < param_cnt; i++, j += kParameterEntrySize) {
       param_descriptor.SetAt(j + kParameterIsFinalOffset,
                              param[i].is_final ? Bool::True() : Bool::False());
       param_descriptor.SetAt(j + kParameterDefaultValueOffset,
           (param[i].default_value == NULL) ? Object::null_instance() :
                                              *(param[i].default_value));
       const Object* metadata = param[i].metadata;
       if ((metadata != NULL) && (*metadata).IsError()) {
-        isolate->set_long_jump_base(base);
         return metadata->raw();  // Error evaluating the metadata.
       }
       param_descriptor.SetAt(j + kParameterMetadataOffset,
           (param[i].metadata == NULL) ? Object::null_instance() :
                                         *(param[i].metadata));
     }
-    isolate->set_long_jump_base(base);
     return param_descriptor.raw();
   } else {
     Error& error = Error::Handle();
     error = isolate->object_store()->sticky_error();
     isolate->object_store()->clear_sticky_error();
-    isolate->set_long_jump_base(base);
     return error.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 
 void Parser::ParseFunction(ParsedFunction* parsed_function) {
   TimerScope timer(FLAG_compiler_stats, &CompilerStats::parser_timer);
   Isolate* isolate = Isolate::Current();
@@ skipping 79 matching lines @@
     }
   }
 
   parsed_function->set_default_parameter_values(default_parameter_values);
 }
 
 
 RawObject* Parser::ParseMetadata(const Class& cls, intptr_t token_pos) {
   Isolate* isolate = Isolate::Current();
   StackZone zone(isolate);
-  LongJump* base = isolate->long_jump_base();
-  LongJump jump;
-  isolate->set_long_jump_base(&jump);
+  LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     const Script& script = Script::Handle(cls.script());
     const Library& lib = Library::Handle(cls.library());
     Parser parser(script, lib, token_pos);
     parser.set_current_class(cls);
     parser.set_parsing_metadata(true);
 
     RawObject* metadata = parser.EvaluateMetadata();
-    isolate->set_long_jump_base(base);
     return metadata;
   } else {
     Error& error = Error::Handle();
     error = isolate->object_store()->sticky_error();
     isolate->object_store()->clear_sticky_error();
-    isolate->set_long_jump_base(base);
     return error.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 
 RawArray* Parser::EvaluateMetadata() {
   CheckToken(Token::kAT, "Metadata character '@' expected");
   GrowableObjectArray& meta_values =
@@ skipping 9873 matching lines @@
 void Parser::SkipQualIdent() {
   ASSERT(IsIdentifier());
   ConsumeToken();
   if (CurrentToken() == Token::kPERIOD) {
     ConsumeToken();  // Consume the kPERIOD token.
     ExpectIdentifier("identifier expected after '.'");
   }
 }
 
 }  // namespace dart