package com.creativewidgetworks.goldparser.simple3.rulehandlers;
import java.util.List;
import com.creativewidgetworks.goldparser.engine.Reduction;
import com.creativewidgetworks.goldparser.parser.GOLDParser;
import com.creativewidgetworks.goldparser.parser.ProcessRule;
import com.creativewidgetworks.goldparser.parser.Variable;
@ProcessRule(rule="<Statement> ::= function Id ( <OptionalParamList> ) begin <Statements> end")
/**
* Rule handler for the function declaration rule.
*
* function ID (<optional parameters) begin
* statements
* return/return statement
* end
*
* @author Ralph Iden (http://www.creativewidgetworks.com)
* @version 5.0.0
*/
public class Function extends Reduction {
public static final String FUNCTION_PREFIX = "[fn]";
private final String functionName;
private final List<String> parameters;
private final Reduction statements;
public Function(GOLDParser parser) {
Reduction reduction = parser.getCurrentReduction();
functionName = reduction.get(1).getData().toString();
parameters = (List<String>)reduction.get(3).asReduction().getValue().asObject();
statements = reduction.get(6).asReduction();
// Clean up the parameter call stack
parser.clearProgramVariable(Parameters.KEY_PARAMETERS);
// Make the function available to be called
parser.setProgramVariable(FUNCTION_PREFIX + functionName, new Variable(this));
}
public List<String> getParameters() {
return parameters;
}
public Reduction getStatements() {
return statements;
}
}