====== Reverse Regular Expression ======

Reverse regular expression used for reverse checking of the text before point and used as replacement for not supported look behind feature of the regexp engine. Reverse regular expressions written in reverse order, so for example, if normal regular expression looks like this: \\
<code>\s+[abc]def</code>
than same reverse regular expression will look like this: 
<code>fed[abc]\s+</code>

In HippoEDIT they are used in all lead conditions for [[syntax:styles:keywords|Keywords]], [[syntax:styles:words|Words]] or block [[syntax:styles:regexp|Regexp]] definitions. 

<code xml><Regexp open="&quot;" open_lead="=elyts" close="&quot;"/></code>

In example above, //open_lead// checks if **"** is preceded by word **style=**.