// --- Mixin interface ------------------------------------------------------ //

@mixin A($mixin, $args...)
{
  @if not(mixin-exists('anthology-#{$mixin}'))
  {
    @error '[anthology] --- Anthology mixin `#{$mixin}` not found.';
  }

  @if $mixin == 'configure' { @include anthology-configure($args...); }
  @else if $mixin == 'define' { @include anthology-define($args...); }
  @else if $mixin == 'emit' { @include anthology-emit($args...); }
  @else if $mixin == 'emit-responsive' { @include anthology-emit-responsive($args...); }
  @else if $mixin == 'extend' { @include anthology-extend($args...); }
  @else if $mixin == 'with-theme' { @include anthology-with-theme($args...) { @content; }; }
  @else if $mixin == 'themeify' { @include anthology-themeify($args...); }
  @else if $mixin == 'breakpoint' { @include anthology-breakpoint($args...) { @content; }; }
  @else if $mixin == 'until-breakpoint' { @include anthology-until-breakpoint($args...) { @content; }; }
  @else if $mixin == 'between-breakpoints' { @include anthology-between-breakpoints($args...) { @content; }; }
  @else if $mixin == 'grid' { @include anthology-grid($args...) { @content; }; }
  @else if $mixin == 'with-namespace' { @include anthology-with-namespace($args...) { @content; } }
}

@mixin _A($mixin, $args...)
{
  @if not(mixin-exists('_anthology-#{$mixin}'))
  {
    @error '[anthology] --- Internal Anthology mixin `#{$mixin}` not found.';
  }

  @if $mixin == 'do-emit' { @include _anthology-do-emit($args...); }
  @else if $mixin == 'emit-metadata' { @include _anthology-emit-metadata($args...); }
}

// --- Function interface --------------------------------------------------- //

@function A($function, $args...)
{
  $function-name: 'anthology-#{$function}';
  $function-exists: function-exists($function-name);

  @if $function-exists
  {
    @return call(get-function($function-name), $args...);
  }
  @else
  {
    @error '[anthology] --- Anthology function `#{$function}` not found.'
  }
}

@function _A($function, $args...)
{
  $function-name: '_anthology-#{$function}';
  $function-exists: function-exists($function-name);

  @if $function-exists
  {
    @return call(get-function($function-name), $args...);
  }
  @else
  {
    @error '[anthology] --- Internal Anthology function `#{$function}` not found.'
  }
}