vendor/splitbrain/lesserphp/src/Functions/Lists.php

   1 <?php
   2
   3 namespace LesserPHP\Functions;
   4
   5 use Exception;
   6 use LesserPHP\Lessc;
   7 use LesserPHP\Utils\Asserts;
   8
   9 /**
  10  * Implements the list functions for LESS
  11  *
  12  * @link https://lesscss.org/functions/#list-functions
  13  */
  14 class Lists extends AbstractFunctionCollection
  15 {
  16     /** @inheritdoc */
  17     public function getFunctions(): array
  18     {
  19         return [
  20             //'length' => [$this, 'length'],
  21             'extract' => [$this, 'extract'],
  22             //'range' => [$this, 'range'],
  23             //'each' => [$this, 'each'],
  24         ];
  25     }
  26
  27     // length is missing
  28
  29     /**
  30      * Returns the value at a specified position in a list
  31      *
  32      * @link https://lesscss.org/functions/#list-functions-extract
  33      * @throws Exception
  34      */
  35     public function extract(array $value)
  36     {
  37         [$list, $idx] = Asserts::assertArgs($value, 2, 'extract');
  38         $idx = Asserts::assertNumber($idx);
  39         // 1 indexed
  40         if ($list[0] == 'list' && isset($list[2][$idx - 1])) {
  41             return $list[2][$idx - 1];
  42         }
  43
  44         // FIXME what is the expected behavior here? Apparently it's not an error?
  45     }
  46
  47     // range is missing
  48
  49     // each is missing
  50 }