Class JFlexLexer

  • All Implemented Interfaces:
    CommentScanner, JavaLexer, Lexer

    public class JFlexLexer
    extends java.lang.Object
    implements JavaLexer
    This class is a scanner generated by JFlex 1.4.3 on 2/14/21, 12:32 AM from the specification file src/grammar/lexer.flex
    • Constructor Summary

      Constructors 
      Constructor Description
      JFlexLexer​(java.io.InputStream in)
      Creates a new scanner.
      JFlexLexer​(java.io.InputStream stream, java.io.Writer writer)  
      JFlexLexer​(java.io.Reader in)
      Creates a new scanner There is also a java.io.InputStream version of this constructor.
      JFlexLexer​(java.io.Reader reader, java.io.Writer writer)  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addCommentHandler​(CommentHandler handler)
      Register this handler as a comment-listener.
      java.lang.String getCodeBody()  
      int getColumn()  
      int getLine()  
      int lex()  
      java.lang.String text()  
      void yybegin​(int newState)
      Enters a new lexical state
      char yycharat​(int pos)
      Returns the character at position pos from the matched text.
      void yyclose()
      Closes the input stream.
      int yylength()
      Returns the length of the matched text region.
      int yylex()
      Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
      void yypushback​(int number)
      Pushes the specified amount of characters back into the input stream.
      void yyreset​(java.io.Reader reader)
      Resets the scanner to read from a new input stream.
      int yystate()
      Returns the current lexical state.
      java.lang.String yytext()
      Returns the text matched by the current regular expression.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • JFlexLexer

        public JFlexLexer​(java.io.Reader reader,
                          java.io.Writer writer)
      • JFlexLexer

        public JFlexLexer​(java.io.InputStream stream,
                          java.io.Writer writer)
      • JFlexLexer

        public JFlexLexer​(java.io.Reader in)
        Creates a new scanner There is also a java.io.InputStream version of this constructor.
        Parameters:
        in - the java.io.Reader to read input from.
      • JFlexLexer

        public JFlexLexer​(java.io.InputStream in)
        Creates a new scanner. There is also java.io.Reader version of this constructor.
        Parameters:
        in - the java.io.Inputstream to read input from.
    • Method Detail

      • text

        public java.lang.String text()
        Specified by:
        text in interface Lexer
      • lex

        public int lex()
                throws java.io.IOException
        Specified by:
        lex in interface Lexer
        Throws:
        java.io.IOException
      • getLine

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

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

        public java.lang.String getCodeBody()
        Specified by:
        getCodeBody 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
      • yyclose

        public final void yyclose()
                           throws java.io.IOException
        Closes the input stream.
        Throws:
        java.io.IOException
      • yyreset

        public final void yyreset​(java.io.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.
        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 java.lang.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 java.io.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:
        java.io.IOException - if any I/O-Error occurs