IfElse.java

gehe zur Dokumentation dieser Datei

package de.lathanda.eos.baseparser;
 
import de.lathanda.eos.vm.Command;
import de.lathanda.eos.vm.DebugPoint;
import de.lathanda.eos.vm.commands.Jump;
import de.lathanda.eos.vm.commands.JumpIfNot;
 
import java.util.ArrayList;
 
public class IfElse extends Node implements AlternativeUnit {
 
    Expression condition;
    Sequence a;
    Sequence b;
 
    public IfElse(Expression condition, Sequence a, Sequence b) {
        this.condition = condition;
        this.a = a;
        this.b = b;
    }
 
    public Expression getCondition() {
        return condition;
    }
 
    @Override
    public Sequence getThen() {
        return a;
    }
 
    @Override
    public Sequence getElse() {
        return b;
    }
 
    @Override
    public void compile(ArrayList<Command> ops, boolean autoWindow) throws Exception {
        ArrayList<Command> aop = new ArrayList<>();
        ArrayList<Command> bop = new ArrayList<>();
        ArrayList<Command> cond = new ArrayList<>();
 
        cond.add(new DebugPoint(condition.getMarker()));
        condition.compile(cond, autoWindow);
 
        a.compile(aop, autoWindow);
        if (b != null) {
            b.compile(bop, autoWindow);
        }
 
        ops.addAll(cond);
        ops.add(new JumpIfNot(aop.size() + 2));
        ops.addAll(aop);
        ops.add(new Jump(bop.size() + 1));
        ops.addAll(bop);
 
    }
 
    @Override
    public void resolveNamesAndTypes(Expression with, Environment env) {
        a.resolveNamesAndTypes(with, env);
        if (b != null) {
            b.resolveNamesAndTypes(with, env);
        }
        condition.resolveNamesAndTypes(with, env);
        if (!condition.getType().isBoolean()) {
            env.addError(marker, "ConditionType", condition.getType());
        }
    }
 
    @Override
    public String toString() {
        return "if " + condition + " then\n" + a + "else\n" + b + "endif";
    }
 
    @Override
    public String getLabel() {
        return createText("IfElse.Label", condition.getLabel());
    }
}