edu.upenn.cis.ptb.lexyacc
Class Yylex

java.lang.Object
  extended byedu.upenn.cis.ptb.lexyacc.Yylex

public class Yylex
extends java.lang.Object

This class is a scanner generated by JFlex 1.4.1 on 2/5/08 8:32 PM from the specification file D:/work/PDTBCVS/PDTBFlat/lib/PTBAPI/LexYacc/Mrg.lex


Field Summary
static int YYEOF
          This character denotes the end of file
static int YYINITIAL
           
static int YYLABEL
          lexical states
static int YYTERM
           
static int YYTRACE
           
 
Constructor Summary
Yylex(java.io.InputStream in)
          Creates a new scanner.
Yylex(java.io.Reader in)
          Creates a new scanner There is also a java.io.InputStream version of this constructor.
 
Method Summary
protected  void closeBrace()
           
 PTBTreeNode getRoot()
           
 void resetTreeContext()
           
protected  void setNode(PTBLabel label)
           
protected  void setNode(PTBLabel pretermLabel, PTBLabel termLabel)
           
 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.
 PTBTreeNode 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
 

Field Detail

YYEOF

public static final int YYEOF
This character denotes the end of file

See Also:
Constant Field Values

YYLABEL

public static final int YYLABEL
lexical states

See Also:
Constant Field Values

YYINITIAL

public static final int YYINITIAL
See Also:
Constant Field Values

YYTERM

public static final int YYTERM
See Also:
Constant Field Values

YYTRACE

public static final int YYTRACE
See Also:
Constant Field Values
Constructor Detail

Yylex

public Yylex(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.

Yylex

public Yylex(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

setNode

protected void setNode(PTBLabel label)

setNode

protected void setNode(PTBLabel pretermLabel,
                       PTBLabel termLabel)

closeBrace

protected void closeBrace()

resetTreeContext

public void resetTreeContext()

getRoot

public PTBTreeNode getRoot()

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 PTBTreeNode 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