parser/ParserError.h

   1 /*
   2  * Copyright (C) 2013 Apple Inc. All Rights Reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef ParserError_h
  27 #define ParserError_h
  28
  29 #include "Error.h"
  30 #include "ErrorHandlingScope.h"
  31 #include "ExceptionHelpers.h"
  32 #include "ParserTokens.h"
  33 #include <wtf/text/WTFString.h>
  34
  35 namespace JSC {
  36
  37 class ParserError {
  38 public:
  39     enum SyntaxErrorType {
  40         SyntaxErrorNone,
  41         SyntaxErrorIrrecoverable,
  42         SyntaxErrorUnterminatedLiteral,
  43         SyntaxErrorRecoverable
  44     };
  45
  46     enum ErrorType {
  47         ErrorNone,
  48         StackOverflow,
  49         EvalError,
  50         OutOfMemory,
  51         SyntaxError
  52     };
  53
  54     ParserError()
  55         : m_type(ErrorNone)
  56         , m_syntaxErrorType(SyntaxErrorNone)
  57     {
  58     }
  59
  60     explicit ParserError(ErrorType type)
  61         : m_type(type)
  62         , m_syntaxErrorType(SyntaxErrorNone)
  63     {
  64     }
  65
  66     ParserError(ErrorType type, SyntaxErrorType syntaxError, JSToken token)
  67         : m_token(token)
  68         , m_type(type)
  69         , m_syntaxErrorType(syntaxError)
  70     {
  71     }
  72
  73     ParserError(ErrorType type, SyntaxErrorType syntaxError, JSToken token, const String& msg, int line)
  74         : m_token(token)
  75         , m_message(msg)
  76         , m_line(line)
  77         , m_type(type)
  78         , m_syntaxErrorType(syntaxError)
  79     {
  80     }
  81
  82     bool isValid() const { return m_type != ErrorNone; }
  83     SyntaxErrorType syntaxErrorType() const { return m_syntaxErrorType; }
  84     const JSToken& token() const { return m_token; }
  85     const String& message() const { return m_message; }
  86     int line() const { return m_line; }
  87
  88     JSObject* toErrorObject(
  89         JSGlobalObject* globalObject, const SourceCode& source,
  90         int overrideLineNumber = -1)
  91     {
  92         ExecState* exec = globalObject->globalExec();
  93         switch (m_type) {
  94         case ErrorNone:
  95             return nullptr;
  96         case SyntaxError:
  97             return addErrorInfo(
  98                 exec,
  99                 createSyntaxError(exec, m_message),
 100                 overrideLineNumber == -1 ? m_line : overrideLineNumber, source);
 101         case EvalError:
 102             return createSyntaxError(exec, m_message);
 103         case StackOverflow: {
 104             ErrorHandlingScope errorScope(globalObject->vm());
 105             return createStackOverflowError(exec);
 106         }
 107         case OutOfMemory:
 108             return createOutOfMemoryError(exec);
 109         }
 110         CRASH();
 111         return nullptr;
 112     }
 113
 114 private:
 115     JSToken m_token;
 116     String m_message;
 117     int m_line { -1 };
 118     ErrorType m_type;
 119     SyntaxErrorType m_syntaxErrorType;
 120 };
 121
 122 } // namespace JSC
 123
 124 #endif // ParserError_h