From b79ee0c299d786627784f7304ba84b80e78ece26 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 1 Jan 2022 12:17:00 +0000
Subject: patch 8.2.3965: Vim9: no easy way to check if Vim9 script is
 supported

Problem:    Vim9: no easy way to check if Vim9 script is supported.
Solution:   Add has('vim9script').
---
 src/evalfunc.c                   |  1 +
 src/testdir/test_vim9_script.vim | 17 +++++++++++++++++
 src/version.c                    |  2 ++
 3 files changed, 20 insertions(+)

(limited to 'src')

diff --git a/src/evalfunc.c b/src/evalfunc.c
index 9b49d81e8..d61797ae3 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -5929,6 +5929,7 @@ f_has(typval_T *argvars, typval_T *rettv)
 		0
 #endif
 		},
+	{"vim9script", 1},
 	{"vimscript-1", 1},
 	{"vimscript-2", 1},
 	{"vimscript-3", 1},
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index f79112ea9..8aea26759 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -7,6 +7,23 @@ source vim9.vim
 source shared.vim
 source screendump.vim
 
+def Test_vim9script_feature()
+  # example from the help, here the feature is always present
+  var lines =<< trim END
+      " old style comment
+      if !has('vim9script')
+        " legacy commands would go here
+        finish
+      endif
+      vim9script
+      # Vim9 script commands go here
+      g:didit = true
+  END
+  CheckScriptSuccess(lines)
+  assert_equal(true, g:didit)
+  unlet g:didit
+enddef
+
 def Test_range_only()
   new
   setline(1, ['blah', 'Blah'])
diff --git a/src/version.c b/src/version.c
index db91b29a7..649954870 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3965,
 /**/
     3964,
 /**/
-- 
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