package com.creativewidgetworks.goldparser.simple3.rulehandlers;
import com.creativewidgetworks.goldparser.engine.ParserException;
import com.creativewidgetworks.goldparser.engine.Reduction;
import com.creativewidgetworks.goldparser.parser.GOLDParser;
import com.creativewidgetworks.goldparser.parser.ProcessRule;
import com.creativewidgetworks.goldparser.simple3.Simple3;
@ProcessRule(rule="<Statement> ::= for ( <Statement> ; <Expression> ; <Statement> ) do <Statements> end")
/**
* Rule handler for the for loop rule.
*
* @author Ralph Iden (http://www.creativewidgetworks.com)
* @version 5.0.0
*/
public class ForLoop extends Reduction {
private Reduction initStatement;
private Reduction conditional;
private Reduction postStatement;
private Reduction statements;
public ForLoop(GOLDParser parser) {
Reduction reduction = parser.getCurrentReduction();
if (reduction != null) {
if (reduction.size() == 11) {
initStatement = reduction.get(2).asReduction();
conditional = reduction.get(4).asReduction();
postStatement = reduction.get(6).asReduction();
statements = reduction.get(9).asReduction();
} else {
parser.raiseParserException(Simple3.formatMessage("error.param_count", "11", String.valueOf(reduction.size())));
}
} else {
parser.raiseParserException(Simple3.formatMessage("error.no_reduction"));
}
}
@Override
public void execute() throws ParserException {
initStatement.execute();
conditional.execute();
while (conditional.getValue().asBool()) {
statements.execute();
postStatement.execute();
conditional.execute();
}
}
}