PowNode.java

package com.pixelmaid.dresscode.antlr.types.tree;

import com.pixelmaid.dresscode.antlr.types.VarType;

public class PowNode extends NodeEvent implements DCNode {

    private DCNode lhs;
    private DCNode rhs;

    public PowNode(DCNode lhs, DCNode rhs) {
        this.lhs = lhs;
        this.rhs = rhs;
    }

    @Override
    public VarType evaluate() {

        VarType a = lhs.evaluate();
        VarType b = rhs.evaluate();

        // number ^ number
        if(a.isNumber() && b.isNumber()) {
            return new VarType(Math.pow(a.asDouble(), b.asDouble()));
        }

        throw new RuntimeException("iIllegal expression: " + this);
    }

    @Override
    public String toString() {
        return String.format("(%s^%s)", lhs, rhs);
    }
}