Assignment

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package program;

import expression.Expression;
import expression.Identifier;

An Assignment consists of an identifier and an expression which should be evaluated and the result stored in the variable named by the identifier.

For example

new Assignment(new Identifier("x"), new Number(5))

represents the code

x := 5

public class Assignment extends Program {
    public final Identifier identifier;
    public final Expression expression;

    public Assignment(Identifier identifier, Expression expression) {
        this.identifier = identifier;
        this.expression = expression;
    }

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    @Override
    public String toString() {
        return identifier + " := " + expression;
    }

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    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        Assignment that = (Assignment) o;

        if (!identifier.equals(that.identifier)) return false;
        return expression.equals(that.expression);
    }
}