package TP2.asd;

import java.util.Map;

public class ExprEval implements ExprVisitor<Map<String, Type>,Integer> {

    @Override
    public Integer visitConst(Const c, Map<String, Type> h) {
        return c.c();
    }

    @Override
    public Integer visitBinOp(BinopExpression e, Map<String, Type> h) {
        switch(e.op()){
            case Op.PLUS: return e.e1().accept(this, h)+e.e2().accept(this, h);
            case Op.MINUS: return e.e1().accept(this, h)-e.e2().accept(this, h);
            case Op.TIMES: return e.e1().accept(this, h)*e.e2().accept(this, h);
            case Op.DIV: return e.e1().accept(this, h)/e.e2().accept(this, h);
            default: throw new IllegalArgumentException();
        }
    }
    
}