Operator.java

package scotch.symbol;

import static lombok.AccessLevel.PRIVATE;
import static scotch.symbol.Value.Fixity.LEFT_INFIX;
import static scotch.symbol.Value.Fixity.PREFIX;

import lombok.AllArgsConstructor;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import scotch.symbol.Value.Fixity;

@AllArgsConstructor(access = PRIVATE)
@EqualsAndHashCode(callSuper = false)
@ToString
public class Operator {

    public static Operator operator(Fixity fixity, int precedence) {
        return new Operator(fixity, precedence);
    }

    private final Fixity fixity;
    private final int    precedence;

    public boolean hasLessPrecedenceThan(Operator other) {
        return precedence < other.precedence;
    }

    public boolean hasSamePrecedenceAs(Operator other) {
        return precedence == other.precedence;
    }

    public boolean isLeftAssociative() {
        return fixity == LEFT_INFIX;
    }

    public boolean isPrefix() {
        return fixity == PREFIX;
    }
}