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Java > Open Source Codes > polyglot > lex > Lexer


1 package polyglot.lex;
2
3 /**
4  * The interface "Lexer" describes lexers produced by JFlex for
5  * Polyglot.
6  */
7 public interface Lexer {
8
9   /** This character denotes the end of file */
10   final public static int YYEOF = -1;
11
12   /**
13    * The file being scanned, for use in constructing diagnostic
14    * messages.
15    */
16   public String JavaDoc file();
17
18   /**
19    * Resumes scanning until the next regular expression is matched,
20    * the end of input is encountered or an I/O-Error occurs.
21    *
22    * @return the next token
23    * @exception IOException if any I/O-Error occurs
24    */
25   public Token nextToken() throws java.io.IOException JavaDoc;
26 }
27
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