Support ${VISUAL} keyword

autoload/neosnippet.vim

@@ -59,19 +59,19 @@ endfunction
 
 " Get marker patterns.
 function! neosnippet#get_placeholder_target_marker_pattern() abort
-  return '\%(\\\@<!\|\\\\\zs\)\${\d\+:\(#:\)\?TARGET\%(:.\{-}\)\?\\\@<!}'
+  return '\%(\\\@<!\|\\\\\zs\)\${\d\+:\(#:\)\?\%(TARGET\|\${VISUAL\%(:.\{-}\)\?}\)\%(:.\{-}\)\?\\\@<!}'
 endfunction
 function! neosnippet#get_placeholder_marker_pattern() abort
   return '<`\d\+\%(:.\{-}\)\?\\\@<!`>'
 endfunction
 function! neosnippet#get_placeholder_marker_substitute_pattern() abort
-  return '\%(\\\@<!\|\\\\\zs\)\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}'
+  return '\%(\\\@<!\|\\\\\zs\)\${\(\d\+\%(:\%(\${VISUAL\%(:.\{-}\)\?}\)\?.\{-}\)\?\\\@<!\)}'
 endfunction
 function! neosnippet#get_placeholder_marker_substitute_nonzero_pattern() abort
-  return '\%(\\\@<!\|\\\\\zs\)\${\([1-9]\d*\%(:.\{-}\)\?\\\@<!\)}'
+  return '\%(\\\@<!\|\\\\\zs\)\${\([1-9]\d*\%(:\%(\${VISUAL\%(:.\{-}\)\?}\)\?.\{-}\)\?\\\@<!\)}'
 endfunction
 function! neosnippet#get_placeholder_marker_substitute_zero_pattern() abort
-  return '\%(\\\@<!\|\\\\\zs\)\${\(0\%(:.\{-}\)\?\\\@<!\)}'
+  return '\%(\\\@<!\|\\\\\zs\)\${\(0\%(:\%(\${VISUAL\%(:.\{-}\)\?}\)\?.\{-}\)\?\\\@<!\)}'
 endfunction
 function! neosnippet#get_placeholder_marker_default_pattern() abort
   return '<`\d\+:\zs.\{-}\ze\\\@<!`>'

autoload/neosnippet/view.vim

@@ -336,6 +336,7 @@ function! s:expand_placeholder(start, end, holder_cnt, line, ...) abort
   " Remove optional marker
   let default = substitute(default, '^#:', '', '')
 
+  let default = substitute(default, '\${VISUAL\(:.\{-}\)\?}', 'TARGET\1', '')
   let is_target = (default =~ '^TARGET\>' && neosnippet.target != '')
   let default = substitute(default, '^TARGET:\?', neosnippet.target, '')