sublimetext2 - In ST2 snippets, can $TM_CURRENT_WORD be overwritten? -

for context: i'm writing snippet python cast variable, so: variable_foo str(variable_foo).

if use $selection, works fine. if use $tm_current_word, inserts replacement value middle of variable text, this: variastr(variable_foo)ble_foo.

i keep using $selection, i'd prefer added ease of not having select variable first ctrl+d $tm_current_word provide. there i'm overlooking makes possible, or $selection way go?

for reference, functional version of snippet: ${1:type}($selection)${0}

and alternate version: ${1:type}${selection/^.*/\($0\)/g}${0}

i believe intended behavior. can use plugin behavior want though.

import sublime_plugin  class expandinsertsnippetcommand(sublime_plugin.textcommand):     def run(self, edit, contents=none, name=none):         cursors = self.view.sel()         new_cursors = []         cursor in cursors:             new_cursors.append(self.view.word(cursor))         cursors.clear()         cursor in new_cursors:             cursors.add(cursor)          self.view.run_command("insert_snippet", {"contents": contents, "name": name}) 

rather using command "insert_snippet" whatever binding have, use "expand_insert_snippet".