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>