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diff --git a/Source/JavaScriptCore/parser/ParserError.h b/Source/JavaScriptCore/parser/ParserError.h
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+++ b/Source/JavaScriptCore/parser/ParserError.h
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+/*
+ * Copyright (C) 2013 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ParserError_h
+#define ParserError_h
+
+#include "Error.h"
+#include "ErrorHandlingScope.h"
+#include "ExceptionHelpers.h"
+#include "ParserTokens.h"
+#include <wtf/text/WTFString.h>
+
+namespace JSC {
+
+class ParserError {
+public:
+    enum SyntaxErrorType {
+        SyntaxErrorNone,
+        SyntaxErrorIrrecoverable,
+        SyntaxErrorUnterminatedLiteral,
+        SyntaxErrorRecoverable
+    };
+
+    enum ErrorType {
+        ErrorNone,
+        StackOverflow,
+        EvalError,
+        OutOfMemory,
+        SyntaxError
+    };
+
+    ParserError()
+        : m_type(ErrorNone)
+        , m_syntaxErrorType(SyntaxErrorNone)
+    {
+    }
+    
+    explicit ParserError(ErrorType type)
+        : m_type(type)
+        , m_syntaxErrorType(SyntaxErrorNone)
+    {
+    }
+
+    ParserError(ErrorType type, SyntaxErrorType syntaxError, JSToken token)
+        : m_token(token)
+        , m_type(type)
+        , m_syntaxErrorType(syntaxError)
+    {
+    }
+
+    ParserError(ErrorType type, SyntaxErrorType syntaxError, JSToken token, const String& msg, int line)
+        : m_token(token)
+        , m_message(msg)
+        , m_line(line)
+        , m_type(type)
+        , m_syntaxErrorType(syntaxError)
+    {
+    }
+
+    bool isValid() const { return m_type != ErrorNone; }
+    SyntaxErrorType syntaxErrorType() const { return m_syntaxErrorType; }
+    const JSToken& token() const { return m_token; }
+    const String& message() const { return m_message; }
+    int line() const { return m_line; }
+
+    JSObject* toErrorObject(
+        JSGlobalObject* globalObject, const SourceCode& source, 
+        int overrideLineNumber = -1)
+    {
+        ExecState* exec = globalObject->globalExec();
+        switch (m_type) {
+        case ErrorNone:
+            return nullptr;
+        case SyntaxError:
+            return addErrorInfo(
+                exec, 
+                createSyntaxError(exec, m_message), 
+                overrideLineNumber == -1 ? m_line : overrideLineNumber, source);
+        case EvalError:
+            return createSyntaxError(exec, m_message);
+        case StackOverflow: {
+            ErrorHandlingScope errorScope(globalObject->vm());
+            return createStackOverflowError(exec);
+        }
+        case OutOfMemory:
+            return createOutOfMemoryError(exec);
+        }
+        CRASH();
+        return nullptr;
+    }
+
+private:
+    JSToken m_token;
+    String m_message;
+    int m_line { -1 };
+    ErrorType m_type;
+    SyntaxErrorType m_syntaxErrorType;
+};
+
+} // namespace JSC
+
+#endif // ParserError_h