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Re: Need advice for naming practice for namespaces in Elisp.
From: |
Oleksandr Gavenko |
Subject: |
Re: Need advice for naming practice for namespaces in Elisp. |
Date: |
Thu, 07 Feb 2013 21:04:29 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.2 (gnu/linux) |
On 2013-02-06, Stefan Monnier wrote:
>> I read very small amount of elisp code and found practice to put '->'
>> in the name of elisp var/func:
>
> I use -> sometimes, typically for access to a struct's fields.
> This comes from my learning lispy languages via Scheme.
>
Thanks for interesting answer!
>> Also I search for dot in names:
>
> I (strongly) recommend against the use of "." in symbols.
> "(erc-response.sender)" could also be interpreted as "(erc-response
> . sender)" and historically Elisp has not been very good at resolving
> this ambiguity in a reliable way.
>
OK. Thanks for advice.
I start from dot as separator to mimic OOP language syntax... And found that
evaluation of:
(defun foo.?bar () ())
by C-x C-e produce:
foo\.bar
in message buffer. Same for 'foo?bar' name. Why '\.' or '\?' was printed?
(info "(elisp)Symbol Type") have:
A symbol name can contain any characters whatever. Most symbol names
are written with letters, digits, and the punctuation characters
`-+=*/'. Such names require no special punctuation; the characters of
the name suffice as long as the name does not look like a number. (If
it does, write a `\' at the beginning of the name to force
interpretation as a symbol.) The characters `_~!@$%^&:<>{}?' are less
often used but also require no special punctuation. Any other
characters may be included in a symbol's name by escaping them with a
backslash.
>> and for colon:
>
> Colon is typically used in a Common-Lisp way, to separate the "module
> name" from the specific definition.
>
>> Seems that official sources don't often use special marker to separate
>> package name and command and some times uses '->', ':' and '.'
>
> Common usage is to use "-".
>
I complete agree.
Also I forget to mention about '/' char:
./cedet/ede/ede-locate.el:307: (cedet-idutils-create/update-database root))
./cedet/ede/ede-locate.el:347: (cedet-cscope-create/update-database root))
And become understand that really have another question...
I write code which have distinct parts, so use prefixes:
blog4y
blog4y-chuck
blog4y-serv
I want be able to recognise them from each other, so instead of:
blog4y-init ; blog4y
blog4y-chunk-write ; blog4y-chunk
blog4y-serv-show ; blog4y-serv
use something like:
blog4y-init ; blog4y
blog4y-chunk:write ; blog4y-chunk
blog4y-serv:show ; blog4y-serv
But this code is ugly:
blog4y-serv:mode
blog4y-serv:mode-map
blog4y-serv:font-lock-keywords
and break elisp conventions... So what I really need is to make prefix visible
and distinct from rest part of name, like:
blog4y-init ; blog4y
blog4y*chunk-write ; blog4y*chunk
blog4y*serv-show ; blog4y*serv
or use any other `-+=*/_~!@$%^&:<>{}?' allowed non-usual symbol.
Seems that any personal choice will be good...
Again thanks all for replays!
--
Best regards!