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CharRangeElement.java
Package: antlr-2_7_0.zip [view]
Upload User: afrynkmhm
Upload Date: 2007-01-06
Package Size: 1262k
Code Size: 1k
Category:
Compiler program
Development Platform:
Others
- package antlr;
- /* ANTLR Translator Generator
- * Project led by Terence Parr at http://www.jGuru.com
- * Software rights: http://www.antlr.org/RIGHTS.html
- *
- * $Id: //depot/code/org.antlr/release/antlr-2.7.0/antlr/CharRangeElement.java#1 $
- */
- class CharRangeElement extends AlternativeElement {
- String label;
- protected char begin=0;
- protected char end =0;
- protected String beginText;
- protected String endText;
- public CharRangeElement(LexerGrammar g, Token t1, Token t2, int autoGenType) {
- super(g);
- begin = (char)ANTLRLexer.tokenTypeForCharLiteral(t1.getText());
- beginText = t1.getText();
- end = (char)ANTLRLexer.tokenTypeForCharLiteral(t2.getText());
- endText = t2.getText();
- line = t1.getLine();
- // track which characters are referenced in the grammar
- for (int i=begin; i<=end; i++) {
- g.charVocabulary.add(i);
- }
- this.autoGenType = autoGenType;
- }
- public void generate() {
- grammar.generator.gen(this);
- }
- public String getLabel() {
- return label;
- }
- public Lookahead look(int k) {
- return grammar.theLLkAnalyzer.look(k, this);
- }
- public void setLabel(String label_) {
- label = label_;
- }
- public String toString() {
- if ( label!=null ) return " "+label+":"+beginText+".."+endText;
- else return " "+beginText+".."+endText;
- }
- }