Work on adding parser
git-svn-id: svn://10.0.0.236/trunk@61470 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
waldemar%netscape.com
parent
617fbb3628
commit
64fa1b6c33
@ -31,7 +31,7 @@ namespace JS = JavaScript;
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// Create a Reader reading characters from begin up to but not including end.
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JS::Reader::Reader(const char16 *begin, const char16 *end):
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begin(begin), p(begin), end(end), lineStart(begin), nGetsPastEnd(0)
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begin(begin), p(begin), end(end), lineStart(begin), nGetsPastEnd(0), lineNum(1), lineFileOffset(0)
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{
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ASSERT(begin <= end);
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#ifdef DEBUG
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@ -140,6 +140,17 @@ JS::StringReader::StringReader(const String &s, const String &source):
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}
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// Set the beginning of the current line. unget cannot be subsequently called past this point.
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// This can only be called if the previous character was LF (u000A), CR (u000D), LS (u2028), or PS (u2029).
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// Moreover, in these cases this method must be called before reading any more characters.
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void JS::StringReader::beginLine()
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{
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++lineNum;
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lineStart = p;
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lineFileOffset = static_cast<uint32>(p - begin);
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}
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JS::String JS::StringReader::sourceFile() const
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{
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return source;
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@ -345,7 +356,6 @@ JS::Lexer::Lexer(Reader &reader, World &world): reader(reader), world(world)
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#ifdef DEBUG
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nTokensBack = 0;
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#endif
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lineNum = 1;
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lexingUnit = false;
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}
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@ -418,7 +428,12 @@ void JS::Lexer::syntaxError(const char *message, uint backUp)
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ch = reader.get();
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} while (ch != char16eof && !isLineBreak(char16orEOFToChar16(ch)));
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reader.unget();
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Exception e(Exception::SyntaxError, widenCString(message), reader.sourceFile(), lineNum, charPos,
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SourcePosition position;
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position.lineFileOffset = reader.lineFileOffset;
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position.lineNum = reader.lineNum;
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position.charPos = charPos;
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Exception e(Exception::SyntaxError, widenCString(message), reader.sourceFile(), position,
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reader.extract(0, reader.charPos()));
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throw e;
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}
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@ -721,7 +736,7 @@ void JS::Lexer::lexToken(bool preferRegExp)
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goto next;
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case CharInfo::IdGroup:
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t.charPos = reader.charPos() - 1;
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t.pos.charPos = reader.charPos() - 1;
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readIdentifier:
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{
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reader.unget();
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@ -734,7 +749,7 @@ void JS::Lexer::lexToken(bool preferRegExp)
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case CharInfo::NonIdGroup:
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case CharInfo::IdContinueGroup:
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t.charPos = reader.charPos() - 1;
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t.pos.charPos = reader.charPos() - 1;
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switch (ch) {
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case '(':
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kind = Token::OpenParenthesis; // (
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@ -764,7 +779,7 @@ void JS::Lexer::lexToken(bool preferRegExp)
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kind = Token::Dot; // .
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ch2 = getChar();
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if (isASCIIDecimalDigit(char16orEOFToChar16(ch2))) {
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reader.backUpTo(t.charPos);
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reader.backUpTo(t.pos.charPos);
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goto number; // decimal point
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} else if (ch2 == '.') {
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kind = Token::DoubleDot; // ..
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@ -824,7 +839,6 @@ void JS::Lexer::lexToken(bool preferRegExp)
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ch = getChar();
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if (isLineBreak(char16orEOFToChar16(ch))) {
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reader.beginLine();
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++lineNum;
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t.lineBreak = true;
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}
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if (ch == char16eof)
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@ -941,12 +955,12 @@ void JS::Lexer::lexToken(bool preferRegExp)
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case CharInfo::LineBreakGroup:
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endOfLine:
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reader.beginLine();
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++lineNum;
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t.lineBreak = true;
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goto next;
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}
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}
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}
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t.kind = kind;
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t.lineNum = lineNum;
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t.pos.lineFileOffset = reader.lineFileOffset;
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t.pos.lineNum = reader.lineNum;
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}
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@ -33,19 +33,26 @@ namespace JavaScript {
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// A Reader reads Unicode characters from some source -- either a file or a string.
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// get() returns all of the characters followed by a char16eof.
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// If get() returns LF (u000A), CR (u000D), LS (u2028), or PS (u2029), then beginLine()
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// must be called before getting or peeking any more characters.
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class Reader {
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protected:
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const char16 *begin; // Beginning of current buffer
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const char16 *p; // Position in current buffer
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const char16 *end; // End of current buffer
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const char16 *lineStart; // Pointer to start of current line
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uint32 nGetsPastEnd; // Number of times char16eof has been returned
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public:
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uint32 lineNum; // One-based number of current line
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FileOffset lineFileOffset; // Byte or character offset of start of current line relative to all of input
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private:
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String *recordString; // String, if any, into which recordChar() records characters
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const char16 *recordBase; // Position of last beginRecording() call
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const char16 *recordPos; // Position of last recordChar() call; nil if a discrepancy occurred
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protected:
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Reader(): nGetsPastEnd(0) {}
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Reader(): nGetsPastEnd(0), lineNum(1), lineFileOffset(0) {}
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public:
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Reader(const char16 *begin, const char16 *end);
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private:
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@ -57,7 +64,7 @@ namespace JavaScript {
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char16orEOF peek();
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void unget(uint32 n = 1);
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void beginLine();
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virtual void beginLine() = 0;
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uint32 charPos() const;
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void backUpTo(uint32 pos);
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@ -92,17 +99,8 @@ namespace JavaScript {
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}
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// Set the beginning of the current line. unget cannot be subsequently called past this point.
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inline void Reader::beginLine()
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{
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lineStart = p;
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#ifdef DEBUG
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recordString = 0;
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#endif
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}
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// Return the character offset relative to the current line. This cannot be called
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// if the current position is past the end of the input.
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// Return the number of characters between the current position and the beginning of the current line.
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// This cannot be called if the current position is past the end of the input.
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inline uint32 Reader::charPos() const
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{
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ASSERT(!nGetsPastEnd);
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@ -139,6 +137,7 @@ namespace JavaScript {
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public:
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StringReader(const String &s, const String &source);
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void beginLine();
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String sourceFile() const;
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};
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@ -298,8 +297,7 @@ namespace JavaScript {
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Kind kind; // The token's kind
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bool lineBreak; // True if line break precedes this token
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uint32 lineNum; // One-based source line number
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uint32 charPos; // Zero-based character offset of this token in source line
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SourcePosition pos; // Position of this token
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StringAtom *identifier; // The token's characters; non-null for identifiers, keywords, and regular expressions only
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String chars; // The token's characters; valid for strings, units, numbers, and regular expression flags only
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float64 value; // The token's value (numbers only)
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@ -313,7 +311,7 @@ namespace JavaScript {
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class Lexer {
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enum {tokenBufferSize = 3}; // Token lookahead buffer size
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enum {tokenBufferSize = 3}; // Token lookahead buffer size
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public:
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Reader &reader;
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World &world;
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@ -325,7 +323,6 @@ namespace JavaScript {
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int nTokensBack; // Number of Tokens on which unget() can be called; these Tokens are beind nextToken
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bool savedPreferRegExp[tokenBufferSize]; // Circular buffer of saved values of preferRegExp to get() calls
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#endif
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uint32 lineNum; // Current line number
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bool lexingUnit; // True if lexing a unit identifier immediately following a number
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public:
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@ -351,5 +348,151 @@ namespace JavaScript {
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void lexToken(bool preferRegExp);
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public:
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};
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class ParseNode {
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enum Kind {
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Empty, // Empty (used in array literals, argument lists, etc.)
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Id, // Identifier
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Num, // Numeral
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Str, // String
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Unit, // Unit after numeral
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RegExp, // Regular expression
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// Punctuators
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OpenParenthesis, // (
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CloseParenthesis, // )
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OpenBracket, // [
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CloseBracket, // ]
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OpenBrace, // {
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CloseBrace, // }
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Comma, // ,
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Semicolon, // ;
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Dot, // .
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DoubleDot, // ..
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TripleDot, // ...
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Arrow, // ->
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Colon, // :
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DoubleColon, // ::
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Pound, // #
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At, // @
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Increment, // ++
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Decrement, // --
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Complement, // ~
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Not, // !
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Times, // *
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Divide, // /
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Modulo, // %
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Plus, // +
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Minus, // -
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LeftShift, // <<
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RightShift, // >>
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LogicalRightShift, // >>>
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LogicalAnd, // &&
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LogicalXor, // ^^
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LogicalOr, // ||
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And, // & // These must be at constant offsets from LogicalAnd ... LogicalOr
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Xor, // ^
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Or, // |
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Assignment, // =
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TimesEquals, // *= // These must be at constant offsets from Times ... Or
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DivideEquals, // /=
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ModuloEquals, // %=
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PlusEquals, // +=
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MinusEquals, // -=
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LeftShiftEquals, // <<=
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RightShiftEquals, // >>=
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LogicalRightShiftEquals, // >>>=
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LogicalAndEquals, // &&=
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LogicalXorEquals, // ^^=
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LogicalOrEquals, // ||=
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AndEquals, // &=
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XorEquals, // ^=
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OrEquals, // |=
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Equal, // ==
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NotEqual, // !=
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LessThan, // <
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LessThanOrEqual, // <=
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GreaterThan, // > // >, >= must be at constant offsets from <, <=
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GreaterThanOrEqual, // >=
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Identical, // ===
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NotIdentical, // !==
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Question, // ?
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// Reserved words
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Abstract, // abstract
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Break, // break
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Case, // case
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Catch, // catch
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Class, // class
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Const, // const
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Continue, // continue
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Debugger, // debugger
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Default, // default
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Delete, // delete
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Do, // do
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Else, // else
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Enum, // enum
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Eval, // eval
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Export, // export
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Extends, // extends
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False, // false
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Final, // final
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Finally, // finally
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For, // for
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Function, // function
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Goto, // goto
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If, // if
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Implements, // implements
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Import, // import
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In, // in
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Instanceof, // instanceof
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Native, // native
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New, // new
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Null, // null
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Package, // package
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Private, // private
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Protected, // protected
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Public, // public
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Return, // return
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Static, // static
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Super, // super
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Switch, // switch
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Synchronized, // synchronized
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This, // this
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Throw, // throw
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Throws, // throws
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Transient, // transient
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True, // true
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Try, // try
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Typeof, // typeof
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Var, // var
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Volatile, // volatile
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While, // while
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With, // with
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// Non-reserved words
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Box, // box
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Constructor, // constructor
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Field, // field
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Get, // get
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Language, // language
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Local, // local
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Method, // method
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Override, // override
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Set, // set
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Version // version
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};
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};
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//class Parser: public Lexer {
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//};
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}
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#endif
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@ -31,7 +31,7 @@ namespace JS = JavaScript;
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// Create a Reader reading characters from begin up to but not including end.
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JS::Reader::Reader(const char16 *begin, const char16 *end):
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begin(begin), p(begin), end(end), lineStart(begin), nGetsPastEnd(0)
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begin(begin), p(begin), end(end), lineStart(begin), nGetsPastEnd(0), lineNum(1), lineFileOffset(0)
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{
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ASSERT(begin <= end);
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#ifdef DEBUG
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@ -140,6 +140,17 @@ JS::StringReader::StringReader(const String &s, const String &source):
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}
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// Set the beginning of the current line. unget cannot be subsequently called past this point.
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// This can only be called if the previous character was LF (u000A), CR (u000D), LS (u2028), or PS (u2029).
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// Moreover, in these cases this method must be called before reading any more characters.
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void JS::StringReader::beginLine()
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{
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++lineNum;
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lineStart = p;
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lineFileOffset = static_cast<uint32>(p - begin);
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}
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JS::String JS::StringReader::sourceFile() const
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{
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return source;
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@ -345,7 +356,6 @@ JS::Lexer::Lexer(Reader &reader, World &world): reader(reader), world(world)
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#ifdef DEBUG
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nTokensBack = 0;
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#endif
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lineNum = 1;
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lexingUnit = false;
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}
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@ -418,7 +428,12 @@ void JS::Lexer::syntaxError(const char *message, uint backUp)
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ch = reader.get();
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} while (ch != char16eof && !isLineBreak(char16orEOFToChar16(ch)));
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reader.unget();
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Exception e(Exception::SyntaxError, widenCString(message), reader.sourceFile(), lineNum, charPos,
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SourcePosition position;
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position.lineFileOffset = reader.lineFileOffset;
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position.lineNum = reader.lineNum;
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position.charPos = charPos;
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Exception e(Exception::SyntaxError, widenCString(message), reader.sourceFile(), position,
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reader.extract(0, reader.charPos()));
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throw e;
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}
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@ -721,7 +736,7 @@ void JS::Lexer::lexToken(bool preferRegExp)
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goto next;
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case CharInfo::IdGroup:
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t.charPos = reader.charPos() - 1;
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t.pos.charPos = reader.charPos() - 1;
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readIdentifier:
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{
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reader.unget();
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@ -734,7 +749,7 @@ void JS::Lexer::lexToken(bool preferRegExp)
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case CharInfo::NonIdGroup:
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case CharInfo::IdContinueGroup:
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t.charPos = reader.charPos() - 1;
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t.pos.charPos = reader.charPos() - 1;
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switch (ch) {
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case '(':
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kind = Token::OpenParenthesis; // (
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@ -764,7 +779,7 @@ void JS::Lexer::lexToken(bool preferRegExp)
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kind = Token::Dot; // .
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ch2 = getChar();
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if (isASCIIDecimalDigit(char16orEOFToChar16(ch2))) {
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reader.backUpTo(t.charPos);
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reader.backUpTo(t.pos.charPos);
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goto number; // decimal point
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} else if (ch2 == '.') {
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kind = Token::DoubleDot; // ..
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@ -824,7 +839,6 @@ void JS::Lexer::lexToken(bool preferRegExp)
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ch = getChar();
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if (isLineBreak(char16orEOFToChar16(ch))) {
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reader.beginLine();
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++lineNum;
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t.lineBreak = true;
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}
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if (ch == char16eof)
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@ -941,12 +955,12 @@ void JS::Lexer::lexToken(bool preferRegExp)
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case CharInfo::LineBreakGroup:
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endOfLine:
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reader.beginLine();
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++lineNum;
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t.lineBreak = true;
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goto next;
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}
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}
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}
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t.kind = kind;
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t.lineNum = lineNum;
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t.pos.lineFileOffset = reader.lineFileOffset;
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t.pos.lineNum = reader.lineNum;
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}
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@ -33,19 +33,26 @@ namespace JavaScript {
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// A Reader reads Unicode characters from some source -- either a file or a string.
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// get() returns all of the characters followed by a char16eof.
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// If get() returns LF (u000A), CR (u000D), LS (u2028), or PS (u2029), then beginLine()
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// must be called before getting or peeking any more characters.
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class Reader {
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protected:
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const char16 *begin; // Beginning of current buffer
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const char16 *p; // Position in current buffer
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const char16 *end; // End of current buffer
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const char16 *lineStart; // Pointer to start of current line
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uint32 nGetsPastEnd; // Number of times char16eof has been returned
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public:
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uint32 lineNum; // One-based number of current line
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FileOffset lineFileOffset; // Byte or character offset of start of current line relative to all of input
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private:
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String *recordString; // String, if any, into which recordChar() records characters
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const char16 *recordBase; // Position of last beginRecording() call
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const char16 *recordPos; // Position of last recordChar() call; nil if a discrepancy occurred
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protected:
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Reader(): nGetsPastEnd(0) {}
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Reader(): nGetsPastEnd(0), lineNum(1), lineFileOffset(0) {}
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public:
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Reader(const char16 *begin, const char16 *end);
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private:
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@ -57,7 +64,7 @@ namespace JavaScript {
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char16orEOF peek();
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void unget(uint32 n = 1);
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void beginLine();
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virtual void beginLine() = 0;
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uint32 charPos() const;
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void backUpTo(uint32 pos);
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@ -92,17 +99,8 @@ namespace JavaScript {
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}
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||||
// Set the beginning of the current line. unget cannot be subsequently called past this point.
|
||||
inline void Reader::beginLine()
|
||||
{
|
||||
lineStart = p;
|
||||
#ifdef DEBUG
|
||||
recordString = 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
// Return the character offset relative to the current line. This cannot be called
|
||||
// if the current position is past the end of the input.
|
||||
// Return the number of characters between the current position and the beginning of the current line.
|
||||
// This cannot be called if the current position is past the end of the input.
|
||||
inline uint32 Reader::charPos() const
|
||||
{
|
||||
ASSERT(!nGetsPastEnd);
|
||||
@ -139,6 +137,7 @@ namespace JavaScript {
|
||||
|
||||
public:
|
||||
StringReader(const String &s, const String &source);
|
||||
void beginLine();
|
||||
String sourceFile() const;
|
||||
};
|
||||
|
||||
@ -298,8 +297,7 @@ namespace JavaScript {
|
||||
|
||||
Kind kind; // The token's kind
|
||||
bool lineBreak; // True if line break precedes this token
|
||||
uint32 lineNum; // One-based source line number
|
||||
uint32 charPos; // Zero-based character offset of this token in source line
|
||||
SourcePosition pos; // Position of this token
|
||||
StringAtom *identifier; // The token's characters; non-null for identifiers, keywords, and regular expressions only
|
||||
String chars; // The token's characters; valid for strings, units, numbers, and regular expression flags only
|
||||
float64 value; // The token's value (numbers only)
|
||||
@ -313,7 +311,7 @@ namespace JavaScript {
|
||||
|
||||
|
||||
class Lexer {
|
||||
enum {tokenBufferSize = 3}; // Token lookahead buffer size
|
||||
enum {tokenBufferSize = 3}; // Token lookahead buffer size
|
||||
public:
|
||||
Reader &reader;
|
||||
World &world;
|
||||
@ -325,7 +323,6 @@ namespace JavaScript {
|
||||
int nTokensBack; // Number of Tokens on which unget() can be called; these Tokens are beind nextToken
|
||||
bool savedPreferRegExp[tokenBufferSize]; // Circular buffer of saved values of preferRegExp to get() calls
|
||||
#endif
|
||||
uint32 lineNum; // Current line number
|
||||
bool lexingUnit; // True if lexing a unit identifier immediately following a number
|
||||
|
||||
public:
|
||||
@ -351,5 +348,151 @@ namespace JavaScript {
|
||||
void lexToken(bool preferRegExp);
|
||||
public:
|
||||
};
|
||||
|
||||
|
||||
class ParseNode {
|
||||
enum Kind {
|
||||
Empty, // Empty (used in array literals, argument lists, etc.)
|
||||
Id, // Identifier
|
||||
Num, // Numeral
|
||||
Str, // String
|
||||
Unit, // Unit after numeral
|
||||
RegExp, // Regular expression
|
||||
|
||||
// Punctuators
|
||||
OpenParenthesis, // (
|
||||
CloseParenthesis, // )
|
||||
OpenBracket, // [
|
||||
CloseBracket, // ]
|
||||
OpenBrace, // {
|
||||
CloseBrace, // }
|
||||
|
||||
Comma, // ,
|
||||
Semicolon, // ;
|
||||
Dot, // .
|
||||
DoubleDot, // ..
|
||||
TripleDot, // ...
|
||||
Arrow, // ->
|
||||
Colon, // :
|
||||
DoubleColon, // ::
|
||||
Pound, // #
|
||||
At, // @
|
||||
|
||||
Increment, // ++
|
||||
Decrement, // --
|
||||
|
||||
Complement, // ~
|
||||
Not, // !
|
||||
|
||||
Times, // *
|
||||
Divide, // /
|
||||
Modulo, // %
|
||||
Plus, // +
|
||||
Minus, // -
|
||||
LeftShift, // <<
|
||||
RightShift, // >>
|
||||
LogicalRightShift, // >>>
|
||||
LogicalAnd, // &&
|
||||
LogicalXor, // ^^
|
||||
LogicalOr, // ||
|
||||
And, // & // These must be at constant offsets from LogicalAnd ... LogicalOr
|
||||
Xor, // ^
|
||||
Or, // |
|
||||
|
||||
Assignment, // =
|
||||
TimesEquals, // *= // These must be at constant offsets from Times ... Or
|
||||
DivideEquals, // /=
|
||||
ModuloEquals, // %=
|
||||
PlusEquals, // +=
|
||||
MinusEquals, // -=
|
||||
LeftShiftEquals, // <<=
|
||||
RightShiftEquals, // >>=
|
||||
LogicalRightShiftEquals, // >>>=
|
||||
LogicalAndEquals, // &&=
|
||||
LogicalXorEquals, // ^^=
|
||||
LogicalOrEquals, // ||=
|
||||
AndEquals, // &=
|
||||
XorEquals, // ^=
|
||||
OrEquals, // |=
|
||||
|
||||
Equal, // ==
|
||||
NotEqual, // !=
|
||||
LessThan, // <
|
||||
LessThanOrEqual, // <=
|
||||
GreaterThan, // > // >, >= must be at constant offsets from <, <=
|
||||
GreaterThanOrEqual, // >=
|
||||
Identical, // ===
|
||||
NotIdentical, // !==
|
||||
|
||||
Question, // ?
|
||||
|
||||
// Reserved words
|
||||
Abstract, // abstract
|
||||
Break, // break
|
||||
Case, // case
|
||||
Catch, // catch
|
||||
Class, // class
|
||||
Const, // const
|
||||
Continue, // continue
|
||||
Debugger, // debugger
|
||||
Default, // default
|
||||
Delete, // delete
|
||||
Do, // do
|
||||
Else, // else
|
||||
Enum, // enum
|
||||
Eval, // eval
|
||||
Export, // export
|
||||
Extends, // extends
|
||||
False, // false
|
||||
Final, // final
|
||||
Finally, // finally
|
||||
For, // for
|
||||
Function, // function
|
||||
Goto, // goto
|
||||
If, // if
|
||||
Implements, // implements
|
||||
Import, // import
|
||||
In, // in
|
||||
Instanceof, // instanceof
|
||||
Native, // native
|
||||
New, // new
|
||||
Null, // null
|
||||
Package, // package
|
||||
Private, // private
|
||||
Protected, // protected
|
||||
Public, // public
|
||||
Return, // return
|
||||
Static, // static
|
||||
Super, // super
|
||||
Switch, // switch
|
||||
Synchronized, // synchronized
|
||||
This, // this
|
||||
Throw, // throw
|
||||
Throws, // throws
|
||||
Transient, // transient
|
||||
True, // true
|
||||
Try, // try
|
||||
Typeof, // typeof
|
||||
Var, // var
|
||||
Volatile, // volatile
|
||||
While, // while
|
||||
With, // with
|
||||
|
||||
// Non-reserved words
|
||||
Box, // box
|
||||
Constructor, // constructor
|
||||
Field, // field
|
||||
Get, // get
|
||||
Language, // language
|
||||
Local, // local
|
||||
Method, // method
|
||||
Override, // override
|
||||
Set, // set
|
||||
Version // version
|
||||
};
|
||||
};
|
||||
|
||||
//class Parser: public Lexer {
|
||||
//};
|
||||
}
|
||||
#endif
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user