add option to disable closing delims if open delim added before an alphanumeric

autoload/delimitMate.vim

@@ -261,6 +261,8 @@ function! delimitMate#ParenDelim(char) " {{{
 	if (col) < 0
 		call setline('.',a:char.line)
 		call insert(b:_l_delimitMate_buffer, a:char)
+	elseif b:_l_delimitMate_smart_parens && line[col + 1] =~ '[[:alnum:]]'
+		return ''
 	else
 		"echom string(col).':'.line[:(col)].'|'.line[(col+1):]
 		call setline('.',line[:(col)].a:char.line[(col+1):])
@@ -528,7 +530,7 @@ function! delimitMate#TestMappings() "{{{
 endfunction "}}}
 
 function! delimitMate#OptionsList() "{{{
-	return {'autoclose' : 1,'matchpairs': &matchpairs, 'quotes' : '" '' `', 'nesting_quotes' : [], 'expand_cr' : 0, 'expand_space' : 0, 'smart_quotes' : 1, 'balance_matchpairs' : 0, 'excluded_regions' : 'Comment', 'excluded_ft' : '', 'apostrophes' : ''}
+	return {'autoclose' : 1,'matchpairs': &matchpairs, 'quotes' : '" '' `', 'nesting_quotes' : [], 'expand_cr' : 0, 'expand_space' : 0, 'smart_quotes' : 1, 'smart_parens' : 1, 'balance_matchpairs' : 0, 'excluded_regions' : 'Comment', 'excluded_ft' : '', 'apostrophes' : ''}
 endfunction " delimitMate#OptionsList }}}
 "}}}
 

doc/delimitMate.txt

@@ -93,6 +93,8 @@ specific file types, see |delimitMateOptionDetails| for examples.
 
 |'delimitMate_smart_quotes'|      Turns on/off the "smart quotes" feature.
 
+|'delimitMate_smart_parens'|      Turns on/off the "smart parens" feature.
+
 |'delimitMate_balance_matchpairs'|Turns on/off the "balance matching pairs"
                                 feature.
 
@@ -211,6 +213,18 @@ e.g.: >
         let delimitMate_smart_quotes = 0
         au FileType tcl let b:delimitMate_smart_quotes = 0
 <
+------------------------------------------------------------------------------
+                                                  *'delimitMate_smart_parens'*
+                                                *'b:delimitMate_smart_parens'*
+Values: 1 or 0                                                               ~
+Default: 1                                                                   ~
+
+This option turns on/off the smart parens feature. Read
+|delimitMateSmartParens| for details.
+e.g.: >
+        let delimitMate_smart_parens = 0
+        au FileType tcl let b:delimitMate_smart_parens = 0
+<
 ------------------------------------------------------------------------------
                                             *'delimitMate_balance_matchpairs'*
                                           *'b:delimitMate_balance_matchpairs'*
@@ -375,6 +389,23 @@ e.g. typing at the "|": >
                       "   |  let i = "|  |  let i = "|"
                       'm  |  I|          |  I'm|
 <
+------------------------------------------------------------------------------
+   3.4 SMART PARENS                                   *delimitMateSmartParens*
+
+Like "smart quotes", but applied to parens (as well as [, {, etc.), only
+inserting the opening delimiter if preceding an alphanumeric character. This
+should cover adding parens, etc around existing words without having to handle
+the uncessary closing delimiter. This feature can be disabled by setting the
+option
+|'delimitMate_smart_parens'| to 0.
+
+e.g. typing at the "|": >
+
+                     What |    Before    |     After
+                  =======================================
+                      (   |  function|   |  function(|)
+                      (   |  |var        |  (|var
+<
 ------------------------------------------------------------------------------
    3.5 BALANCING MATCHING PAIRS                           *delimitMateBalance*
 

plugin/delimitMate.vim

@@ -114,6 +114,8 @@ function! s:init() "{{{
 
 	" smart_quotes
 	call s:option_init("smart_quotes", 1)
+	" smart_parens
+	call s:option_init("smart_parens", 1)
 
 	" apostrophes
 	call s:option_init("apostrophes", "")