YAML parser with custom tags

[jasny]

• https://www.php.net/manual/en/yaml.callbacks.parse.php
• https://github.com/dlang-community/D-YAML/wiki/Custom-YAML-data-types

Example;

{
  foo: !ref abc
  bar: !tpl hello {{ planet }}
}

[jasny]

Quick and dirty fix in lctest

$tagToStruct = function($value, $tag) {
    $key = substr($tag, 1);
    return ["<$key>" => $value];
};

$callbacks = [
    '!ref' => $tagToStruct,
    '!eval' => $tagToStruct,
    '!ifset' => $tagToStruct,
    '!switch' => $tagToStruct,
    '!merge' => $tagToStruct,
    '!tpl' => $tagToStruct,
    '!apply' => $tagToStruct,
    '!dateFormat' => $tagToStruct
];

$scenario = yaml_parse_file($file, 0, $ndocs, $callbacks);