@function __after-callback($arguments...) {
    $n: __this('n');
    $function: __this('function');

    @if ($n < 1) {
        @return __call($function, __this(), $arguments...);
    }

    $_: __this('n', $n - 1);

    @return null;
}


@function __after($n, $function) {
    @if not (__function-exists($function)) {
        @if (__function-exists($n)) {
            $temp: $n;
            $n: $function;
            $function: $temp;
        } @else {
            @error '#{$function} is not a function for __after.';
        }
    }

    $_: __scope((
        'function': $function,
        'n': $n
    ));

    $after-callback: __bind('__after-callback');

    $_: __scope(false);

    @return $after-callback;
}


/// The opposite of `_before`; this method creates a function that invokes
/// `$function` once it is called `$n` or more times.
///
///
/// @access public
/// @group Function
/// @param {number} n The number of calls before `$function` is invoked.
/// @param {Function} func The function to restrict.
/// @returns {Function} Returns the new restricted function.
/// @example scss
///     @function warn-overuse() {
///         @warn 'You are using this mixin too many times.';
///     }
///
///     $warn-overuse: _after(3, warn-overuse);
///
///     @mixin my-mixin() {
///         // ...
///         $overuse: _exec($warn-overuse);
///     }
///
///     @each $selector in '.one', '.two', '.three', '.four' {
///         @include my-mixin();
///     }

@function _after($args...) {
    @return call(get-function('__after'), $args...);
}