customised Susy grid-settings mixin

grid-settings.sass

=grid-settings($cols: $total-columns,$width: $column-width,$gutter: $gutter-width,$padding: $grid-padding, $c-width: $container-width, $c-style: $container-style)

  // keep the defaults around
  $default-cols: $total-columns
  $default-width: $column-width
  $default-gutter: $gutter-width
  $default-padding: $grid-padding
  $default-container-width: $container-width
  $default-container-style: $container-style

  // use the new settings
  $total-columns: $cols
  $column-width: $width
  $gutter-width: $gutter
  $grid-padding: $padding
  $container-width: $c-width
  $container-style: $c-style

  // apply to contents
  @content

  // re-instate the defaults
  $total-columns: $default-cols
  $column-width: $default-width
  $gutter-width: $default-gutter
  $grid-padding: $default-padding
  $container-width: $default-container-width
  $container-style: $default-container-style