[json parser] add position to error message.

src/json-parser.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_PARSING_JSON_PARSER_H_
-#define V8_PARSING_JSON_PARSER_H_
+#ifndef V8_JSON_PARSER_H_
+#define V8_JSON_PARSER_H_
 
 #include "src/char-predicates.h"
 #include "src/conversions.h"
 #include "src/debug/debug.h"
 #include "src/factory.h"
 #include "src/messages.h"
 #include "src/parsing/scanner.h"
 #include "src/parsing/token.h"
 #include "src/transitions.h"
 #include "src/types.h"
@@ skipping 193 matching lines @@
   // Advance to the first character (possibly EOS)
   AdvanceSkipWhitespace();
   Handle<Object> result = ParseJsonValue();
   if (result.is_null() || c0_ != kEndOfString) {
     // Some exception (for example stack overflow) is already pending.
     if (isolate_->has_pending_exception()) return Handle<Object>::null();
 
     // Parse failed. Current character is the unexpected token.
     Factory* factory = this->factory();
     MessageTemplate::Template message;
-    Handle<String> argument;
+    Handle<Object> arg1 = Handle<Smi>(Smi::FromInt(position_), isolate());
+    Handle<Object> arg2;
 
     switch (c0_) {
       case kEndOfString:
-        message = MessageTemplate::kUnexpectedEOS;
+        message = MessageTemplate::kJsonParseUnexpectedEOS;
         break;
       case '-':
       case '0':
       case '1':
       case '2':
       case '3':
       case '4':
       case '5':
       case '6':
       case '7':
       case '8':
       case '9':
-        message = MessageTemplate::kUnexpectedTokenNumber;
+        message = MessageTemplate::kJsonParseUnexpectedTokenNumber;
         break;
       case '"':
-        message = MessageTemplate::kUnexpectedTokenString;
+        message = MessageTemplate::kJsonParseUnexpectedTokenString;
         break;
       default:
-        message = MessageTemplate::kUnexpectedToken;
-        argument = factory->LookupSingleCharacterStringFromCode(c0_);
+        message = MessageTemplate::kJsonParseUnexpectedToken;
+        arg2 = arg1;
+        arg1 = factory->LookupSingleCharacterStringFromCode(c0_);
         break;
     }
 
     Handle<Script> script(factory->NewScript(source_));
     // We should sent compile error event because we compile JSON object in
     // separated source file.
     isolate()->debug()->OnCompileError(script);
     MessageLocation location(script, position_, position_ + 1);
-    Handle<Object> error = factory->NewSyntaxError(message, argument);
+    Handle<Object> error = factory->NewSyntaxError(message, arg1, arg2);
     return isolate()->template Throw<Object>(error, &location);
   }
   return result;
 }
 
 
 // Parse any JSON value.
 template <bool seq_one_byte>
 Handle<Object> JsonParser<seq_one_byte>::ParseJsonValue() {
   StackLimitCheck stack_check(isolate_);
@@ skipping 568 matching lines @@
 
   DCHECK_EQ('"', c0_);
   // Advance past the last '"'.
   AdvanceSkipWhitespace();
   return result;
 }
 
 }  // namespace internal
 }  // namespace v8
 
-#endif  // V8_PARSING_JSON_PARSER_H_
+#endif  // V8_JSON_PARSER_H_