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55 lines
1.5 KiB
55 lines
1.5 KiB
5 years ago
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package com.fr.third.antlr;
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/* ANTLR Translator Generator
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* Project led by Terence Parr at http://www.cs.usfca.edu
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* Software rights: http://www.antlr.org/license.html
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*
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* $Id: //depot/code/org.antlr/release/antlr-2.7.7/antlr/CharRangeElement.java#2 $
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*/
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class CharRangeElement extends AlternativeElement {
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String label;
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protected char begin = 0;
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protected char end = 0;
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protected String beginText;
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protected String endText;
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public CharRangeElement(LexerGrammar g, Token t1, Token t2, int autoGenType) {
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super(g);
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begin = (char)ANTLRLexer.tokenTypeForCharLiteral(t1.getText());
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beginText = t1.getText();
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end = (char)ANTLRLexer.tokenTypeForCharLiteral(t2.getText());
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endText = t2.getText();
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line = t1.getLine();
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// track which characters are referenced in the grammar
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for (int i = begin; i <= end; i++) {
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g.charVocabulary.add(i);
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}
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this.autoGenType = autoGenType;
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}
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public void generate() {
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grammar.generator.gen(this);
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}
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public String getLabel() {
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return label;
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}
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public Lookahead look(int k) {
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return grammar.theLLkAnalyzer.look(k, this);
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}
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public void setLabel(String label_) {
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label = label_;
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}
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public String toString() {
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if (label != null)
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return " " + label + ":" + beginText + ".." + endText;
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else
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return " " + beginText + ".." + endText;
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}
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}
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