tokenrangeelement.java

来自「SRI international 发布的OAA框架软件」· Java 代码 · 共 47 行

package antlr_oaa;

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/RIGHTS.html
 *
 * $Id: TokenRangeElement.java,v 1.1 2002/11/08 17:37:38 agno Exp $
 */

class TokenRangeElement extends AlternativeElement {
	String label;
	protected int begin=Token.INVALID_TYPE;
	protected int end  =Token.INVALID_TYPE;
	protected String beginText;
	protected String endText;


	public TokenRangeElement(Grammar g, Token t1, Token t2, int autoGenType) {
	    super(g, autoGenType);
	    begin = grammar.tokenManager.getTokenSymbol(t1.getText()).getTokenType();
	    beginText = t1.getText();
	    end = grammar.tokenManager.getTokenSymbol(t2.getText()).getTokenType();
	    endText = t2.getText();
	    line = t1.getLine();
	}
	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;
	    }
	}
}