Class JFlexLexer

    • Constructor Detail

      • JFlexLexer

        public JFlexLexer​(Reader reader,
                          Writer writer)
      • JFlexLexer

        public JFlexLexer​(Reader in)
        Creates a new scanner
        Parameters:
        in - the java.io.Reader to read input from.
    • Method Detail

      • getLine

        public int getLine()
        Specified by:
        getLine in interface Lexer
      • getColumn

        public int getColumn()
        Specified by:
        getColumn in interface Lexer
      • addCommentHandler

        public void addCommentHandler​(CommentHandler handler)
        Description copied from interface: CommentScanner
        Register this handler as a comment-listener. If scanner hits a comment, all handlers will be triggered.
        Specified by:
        addCommentHandler in interface CommentScanner
        Parameters:
        handler - the commentHandler to add to the CommentScanner
      • yyreset

        public final void yyreset​(Reader reader)
        Resets the scanner to read from a new input stream. Does not close the old reader. All internal variables are reset, the old input stream cannot be reused (internal buffer is discarded and lost). Lexical state is set to ZZ_INITIAL. Internal scan buffer is resized down to its initial length, if it has grown.
        Parameters:
        reader - the new input stream
      • yystate

        public final int yystate()
        Returns the current lexical state.
      • yybegin

        public final void yybegin​(int newState)
        Enters a new lexical state
        Parameters:
        newState - the new lexical state
      • yytext

        public final String yytext()
        Returns the text matched by the current regular expression.
      • yycharat

        public final char yycharat​(int pos)
        Returns the character at position pos from the matched text. It is equivalent to yytext().charAt(pos), but faster
        Parameters:
        pos - the position of the character to fetch. A value from 0 to yylength()-1.
        Returns:
        the character at position pos
      • yylength

        public final int yylength()
        Returns the length of the matched text region.
      • yypushback

        public void yypushback​(int number)
        Pushes the specified amount of characters back into the input stream. They will be read again by then next call of the scanning method
        Parameters:
        number - the number of characters to be read again. This number must not be greater than yylength()!
      • yylex

        public int yylex()
                  throws IOException
        Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
        Returns:
        the next token
        Throws:
        IOException - if any I/O-Error occurs