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package bjc.utils.dice;
import java.util.Map;
/**
* A variable expression that represents binding a variable to a name in an
* enviroment
*
* @author ben
*
*/
public class BindingDiceExpression implements IDiceExpression {
private String name;
private IDiceExpression exp;
/**
* Create a new dice expression binder
*
* @param name
* The name of the variable to bind
* @param exp
* The expression to bind to the variable
* @param env
* The enviroment to bind it in
*/
public BindingDiceExpression(String name, IDiceExpression exp,
Map<String, IDiceExpression> env) {
this.name = name;
this.exp = exp;
env.put(name, exp);
}
public BindingDiceExpression(IDiceExpression left,
IDiceExpression right, Map<String, IDiceExpression> env) {
this(((ReferenceDiceExpression) left).getName(), right, env);
}
@Override
public int roll() {
return exp.roll();
}
@Override
public String toString() {
return "assign[n=" + name + ", exp=" + exp.toString() + "]";
}
}
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