persistence.antlr.CharRangeElement Maven / Gradle / Ivy
package persistence.antlr;
/* ANTLR Translator Generator
* Project led by Terence Parr at http://www.jGuru.com
* Software rights: http://www.antlr.org/license.html
*
*/
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;
}
}