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Viewing changes to src/java_cup/runtime/Scanner.java

  • Committer: Bazaar Package Importer
  • Author(s): Takashi Okamoto
  • Date: 2002-02-16 13:38:21 UTC
  • Revision ID: james.westby@ubuntu.com-20020216133821-5wsdprpt9xl7ondr
Tags: upstream-1.3.5
Import upstream version 1.3.5

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src/java_cup/runtime/Scanner.java
 
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package java_cup.runtime;
 
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/**
 
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 * Defines the Scanner interface, which CUP uses in the default
 
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 * implementation of <code>lr_parser.scan()</code>.  Integration
 
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 * of scanners implementing <code>Scanner</code> is facilitated.
 
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 *
 
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 * @version last updated 23-Jul-1999
 
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 * @author David MacMahon <davidm@smartsc.com>
 
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 */
 
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/* *************************************************
 
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  Interface Scanner
 
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  Declares the next_token() method that should be
 
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  implemented by scanners.  This method is typically
 
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  called by lr_parser.scan().  End-of-file can be
 
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  indicated either by returning
 
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  <code>new Symbol(lr_parser.EOF_sym())</code> or
 
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  <code>null</code>.
 
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 ***************************************************/
 
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public interface Scanner {
 
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    /** Return the next token, or <code>null</code> on end-of-file. */
 
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    public Symbol next_token() throws java.lang.Exception;
 
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}