Re: [vim/vim] Refined autoload mechanism explanation (PR #20833)

h-east left a comment (vim/vim#20833)

On 1, "without using globals": that works as well. Same structure as 52.4, one
file, no `g:` anywhere, with a script-local `def`:

```vim
	vim9script noclear

	if !exists(':BNRead')
	  command -nargs=* BNRead BufNetRead(<f-args>)
	  exe 'au FuncUndefined BufNet* source ' .. expand('<script>')
	  finish
	endif

	def BufNetRead(...args: list<string>)
	  echo 'BufNetRead(' .. string(args) .. ')'
	enddef
```

The first source defines only the command. `:BNRead abc def` then fires
`FuncUndefined`, the script is sourced again, the `def` is defined and the call
runs. Checked here with 9.2.

`BufNetRead()` above is script-local, not global. From `:help vim9-scopes`:

	When using `:function` or `:def` to specify a new function at the
	script level in a Vim9 script, the function is local to the script.
	Like prefixing "s:" in legacy script.

The only change from 52.4 is that the guard tests the existence of an item
instead of a value, for the reason given in my previous comment. That is also
the counter-example asked for in 2.

3 is fair for the section as it stands. 52.4 is built around a single file, so
`import autoload` does not fit into it unchanged.

One remark on the additional file, though. A separate script under `autoload/`
is the normal layout for Vim plugins, and close to all of them are written that
way, so it is the convention rather than an extra cost.

-- 
Reply to this email directly or view it on GitHub:
https://github.com/vim/vim/pull/20833#issuecomment-5088464407
You are receiving this because you are subscribed to this thread.

Message ID: <vim/vim/pull/20833/[email protected]>

-- 
-- 
You received this message from the "vim_dev" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

--- 
You received this message because you are subscribed to the Google Groups "vim_dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
To view this discussion visit https://groups.google.com/d/msgid/vim_dev/vim/vim/pull/20833/c5088464407%40github.com.