commit 6e6386716f9494ae86027c6d34f657fd03dfec42
author Illia Bobyr <illia.bobyr@gmail.com> Tue Oct 17 11:09:45 2023 +0200
committer Christian Brabandt <cb@256bit.org> Tue Oct 17 11:09:45 2023 +0200
tree 4a6c57ffec25e0af23238b2c23bd038eb2a2c86f
parent 2e3cd52fa02b1a208c97992b1bca3b04f7be66d4

patch 9.0.2040: trim(): hard to use default mask

Problem:  trim(): hard to use default mask
Solution: Use default 'mask' when it is v:none

The default 'mask' value is pretty complex, as it includes many
characters.  Yet, if one needs to specify the trimming direction, the
third argument, 'trim()' currently requires the 'mask' value to be
provided explicitly.

'v:none' is already used to mean "use the default argument value" in
user defined functions.  See |none-function_argument| in help.

closes: #13363

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Illia Bobyr <illia.bobyr@gmail.com>

src/testdir/test_functions.vim

diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index d598966..85d1d22 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -2231,11 +2231,15 @@
   call assert_fails('eval trim("  vim  ", " ", [])', 'E745:')
   call assert_fails('eval trim("  vim  ", " ", -1)', 'E475:')
   call assert_fails('eval trim("  vim  ", " ", 3)', 'E475:')
-  call assert_fails('eval trim("  vim  ", 0)', 'E1174:')
+  call assert_fails('eval trim("  vim  ", 0)', 'E1393:')
 
   let chars = join(map(range(1, 0x20) + [0xa0], {n -> n->nr2char()}), '')
   call assert_equal("x", trim(chars . "x" . chars))
 
+  call assert_equal("x", trim(chars . "x" . chars, v:none, 0))
+  call assert_equal("x" . chars, trim(chars . "x" . chars, v:none, 1))
+  call assert_equal(chars . "x", trim(chars . "x" . chars, v:none, 2))
+
   call assert_fails('let c=trim([])', 'E730:')
 endfunc