java_cup
Class Lexer

java.lang.Object
  extended by java_cup.Lexer
All Implemented Interfaces:
Scanner, sym

public class Lexer
extends java.lang.Object
implements sym, Scanner

This class is a scanner generated by JFlex 1.3.5 on 9-Sep-06 6:37:51 AM from the specification file file:/export/home/walluck/rpm/BUILD/develop/flex/Lexer.jflex


Field Summary
static int CODESEG
          lexical states
static int YYEOF
          This character denotes the end of file
static int YYINITIAL
           
 
Fields inherited from interface java_cup.sym
ACTION, action_code_part, BAR, CODE, code_part, code_parts, CODE_STRING, COLON, COLON_COLON_EQUALS, COMMA, declares_non_term, declares_term, DOT, empty, EOF, error, EXTENDS, GT, ID, IMPORT, import_id, import_list, import_spec, INIT, init_code, label_id, LBRACK, LEFT, LT, multipart_id, new_non_term_id, new_term_id, NON, non_term_name_list, non_terminal, NONASSOC, NONTERMINAL, nt_id, NT$0, NT$1, NT$10, NT$11, NT$12, NT$13, NT$2, NT$3, NT$4, NT$5, NT$6, NT$7, NT$8, NT$9, opt_label, opt_semi, PACKAGE, package_spec, PARSER, parser_code_part, PERCENT_PREC, preced, PRECEDENCE, precedence_l, precedence_list, prod_part, prod_part_list, production, production_list, QUESTION, RBRACK, rhs, rhs_list, RIGHT, robust_id, SCAN, scan_code, SEMI, spec, STAR, START, start_spec, SUPER, symbol, symbol_id, symbol_list, term_id, term_name_list, TERMINAL, terminal_id, terminal_list, type_id, typearglist, typearguement, wildcard, WITH
 
Constructor Summary
Lexer(ComplexSymbolFactory sf)
           
Lexer(java.io.InputStream in)
          Creates a new scanner.
Lexer(java.io.Reader in)
          Creates a new scanner There is also a java.io.InputStream version of this constructor.
 
Method Summary
protected  void emit_error(java.lang.String message)
           
protected  void emit_warning(java.lang.String message)
           
 Symbol next_token()
          Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
 Symbol symbol(java.lang.String name, int code)
           
 Symbol symbol(java.lang.String name, int code, java.lang.String lexem)
           
 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.
 void yyreset(java.io.Reader reader)
          Closes the current stream, and 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

CODESEG

public static final int CODESEG
lexical states

See Also:
Constant Field Values

YYINITIAL

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

Lexer

public Lexer(ComplexSymbolFactory sf)

Lexer

public Lexer(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.

Lexer

public Lexer(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

symbol

public Symbol symbol(java.lang.String name,
                     int code)

symbol

public Symbol symbol(java.lang.String name,
                     int code,
                     java.lang.String lexem)

emit_warning

protected void emit_warning(java.lang.String message)

emit_error

protected void emit_error(java.lang.String message)

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)
                   throws java.io.IOException
Closes the current stream, and resets the scanner to read from a new input stream. All internal variables are reset, the old input stream cannot be reused (internal buffer is discarded and lost). Lexical state is set to YY_INITIAL.

Parameters:
reader - the new input stream
Throws:
java.io.IOException

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.


next_token

public Symbol next_token()
                  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.

Specified by:
next_token in interface Scanner
Returns:
the next token
Throws:
IOException - if any I/O-Error occurs