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Lexicon.java
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// FILE. . . . . /home/hak/hlt/src/hlt/language/jaccapps/xml/sources/Lexicon.java // EDIT BY . . . Hassan Ait-Kaci // ON MACHINE. . Hp-Dv7 // STARTED ON. . Fri Oct 19 22:55:13 2012
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This is a simple lexicon class defining lexical units for the
tokenizer in Tokenizer.java,
for this Jacc application, which is meant to illustrate XML
generation for language of simple expressions.
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package hlt.xml;
import java.util.HashMap;
import java.util.HashSet;
class Lexicon
{
| Returns true iff the specified string starts with a question mark, and every other character is alphanumeric or underscore. |
public final static boolean isVariable (String s)
{
char c = s.charAt(0);
if (c != '?')
return false;
for (int i=1; i<s.length(); i++)
{
c = s.charAt(i);
if (!Character.isLetterOrDigit(c) && c != '_')
return false;
}
return true;
}
| The following is a store for RCL reserved words. |
public static final HashSet reserved = new HashSet();
| Returns true iff the specified string is a reserved RCL word. |
public final static boolean isReserved (String word)
{
return reserved.contains(word);
}
| Declares the specified string as a reserved word. |
static final void reserved (String word)
{
reserved.add(word);
}
}
This file was generated on Fri Oct 19 17:48:33 PDT 2012 from file Lexicon.java
by the hlt.language.tools.Hilite Java tool written by Hassan Aït-Kaci