package net.ciklum.icfpc11.domain.greenspoon10

import net.ciklum.icfpc11.domain.GameError

/**
 * blabla
 * @author vic
 */
@Typed
class ConstantFunction extends Function {
    final static ConstantFunction ZERO = new ConstantFunction(0)

    final int value

    ConstantFunction(int value) {
        this.value = value
    }

    static ConstantFunction valueOf(int value) {
        (value == 0) ? ZERO : new ConstantFunction(value)
    }

    @Override
    boolean canEvaluate() { true }

    @Override
    Function apply(Function arg) {
        throw new GameError("You cannot apply() constant $value (tried applying to $arg)!")
    }

    boolean isValidSlotNumber() { this.@value >= 0 && this.@value <= 255 }

    String toString() { value == 0 ? 'zero' : "const($value)" }

}