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On the naming/behavior of {if, when}-let (was Re: Anaphoric macros: incr
From: |
Mark Oteiza |
Subject: |
On the naming/behavior of {if, when}-let (was Re: Anaphoric macros: increase visibility) |
Date: |
Sat, 14 Jan 2017 21:24:12 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) |
Michael Heerdegen <address@hidden> writes:
> I sometimes think that
> `if-let*' would be a better name for `if-let' because bindings can refer
> (and naturally most of the time do) refer to other bindings.
There was a thread some time ago (I'd have to go dig for it) where
someone asked why the names lacked the *. Seeing how they are
implemented on top of let*, this should be a no brainer, right?
Further, I think it's even more bizarre that if-let and when-let grew
the single tuple special case, where one can write
(if-let (foo bar) (message "%S" foo) (message "oh no"))
^^^^^^^^^
What makes these binding things special? May as well add brackets and
whatever else from other lisps.
… and yet there is no _actual_ if-let to the effect of:
(let ((a foo)
(b bar))
(if (and a b) 'yes 'no))
Though, for the above, I remember there being an argument against this
being useful. IDK, I've written things like this before.
> I also
> often think that `and-let' (or `and-let*' ...) would be a better name
> for `when-let' (because the expressions for the bindings are `and'ed,
> sot the whole thing feels more like `and' to me).
I'd also like an and-let* (presumably aliased to when-let*).
- Anaphoric macros: increase visibility, Tino Calancha, 2017/01/13
- Re: Anaphoric macros: increase visibility, Michael Heerdegen, 2017/01/13
- Re: Anaphoric macros: increase visibility, Tino Calancha, 2017/01/14
- Re: Anaphoric macros: increase visibility, Michael Heerdegen, 2017/01/14
- On the naming/behavior of {if, when}-let (was Re: Anaphoric macros: increase visibility),
Mark Oteiza <=
- Re: Anaphoric macros: increase visibility, Michael Heerdegen, 2017/01/14
- Re: Anaphoric macros: increase visibility, Tino Calancha, 2017/01/15
- Re: Anaphoric macros: increase visibility, Stefan Monnier, 2017/01/15
- Re: Anaphoric macros: increase visibility, Tino Calancha, 2017/01/15
- Re: Anaphoric macros: increase visibility, Stefan Monnier, 2017/01/15
Re: Anaphoric macros: increase visibility, Dmitri Paduchikh, 2017/01/14