package net.ciklum.icfpc11.domain.greenspoon10

/**
 * blabla
 * @author vic
 */
@Typed
class CurriedFunction extends Function {

    final int argCount
    final List<Function> args
    final MultiArgFunction func

    CurriedFunction(MultiArgFunction func, int argCount, List<Function> args) {
        this.argCount = argCount
        this.args = args
        this.func = func
    }

    @Override
    Function apply(Function arg) {
        super.apply(arg)
        List<Function> newArgs = args + [arg]
        if (args.size() == argCount-1) {
            return func.evaluate(newArgs)
        }

        return new CurriedFunction(func, argCount, newArgs)
    }

    String toString() { "$func${args ? '(' + args.join(',') + ')' : ''}" }
}