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runtime(doc): mention alternative check for vim9script

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Vim9 syntax changed before Vim 9 leading to errors thrown if checked for
availability of Vim9script in Vim Version 8.2 such as

This check seems to work as well and throws less errors on Vim 8.2 such
as on Ubuntu 22.04

closes: #16783

Signed-off-by: Konfekt <Konfekt@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Konfekt
2025-03-05 21:03:21 +01:00
committed by Christian Brabandt
parent c8cce711dd
commit de4b244bfc
1 changed files with 6 additions and 2 deletions
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8
runtime/doc/vim9.txt
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@ -1,4 +1,4 @@
*vim9.txt* For Vim version 9.1. Last change: 2025 Jan 21 *vim9.txt* For Vim version 9.1. Last change: 2025 Mar 05
VIM REFERENCE MANUAL by Bram Moolenaar VIM REFERENCE MANUAL by Bram Moolenaar
@ -1921,6 +1921,10 @@ There is one way to use both legacy and Vim9 syntax in one script file: >
This allows for writing a script that takes advantage of the Vim9 script This allows for writing a script that takes advantage of the Vim9 script
syntax if possible, but will also work on a Vim version without it. syntax if possible, but will also work on a Vim version without it.
Note that Vim9 syntax changed before Vim 9 so that scripts using the current
syntax (such as "import from" instead of "import") might throw errors.
To prevent these, a safer check could be for |v:version| >= 900 instead.
This can only work in two ways: This can only work in two ways:
1. The "if" statement evaluates to false, the commands up to `endif` are 1. The "if" statement evaluates to false, the commands up to `endif` are
skipped and `vim9script` is then the first command actually executed. skipped and `vim9script` is then the first command actually executed.
@ -2435,4 +2439,4 @@ support for classes in Vim is then a problem.
vim:tw=78:ts=8:noet:ft=help:norl: vim:tw=78:ts=8:noet:ft=help:norl:nofen: