Hi, I need switch to uppercase filename in snippet.

<snippet>
	<description>.H GUARD</description>
	<content><![CDATA[#ifndef _${1:${TM_FILENAME/\..+$//}}_H
#define _${1}_H

${2}

#endif]]></content>
	<tabTrigger>once</tabTrigger>
	<scope>source.c, source.objc, source.c++, source.objc++</scope>
</snippet>

Actual