From: "Andreas Röhler" <andreas.roehler@easy-emacs.de>
To: "help-gnu-emacs@gnu.org List" <help-gnu-emacs@gnu.org>
Subject: Re: DynamicBindingVsLexicalBinding
Date: Sun, 13 Oct 2013 09:54:37 +0200 [thread overview]
Message-ID: <525A51BD.5040903@easy-emacs.de> (raw)
In-Reply-To: <871u3qjq0j.fsf@yandex.ru>
Am 12.10.2013 20:35, schrieb Dmitry Gutov:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
>> http://www.emacswiki.org/emacs/DynamicBindingVsLexicalBinding
>>
>> it's said WRT lexical binding
>>
>> "Because it's (1) much easier for the user [that is, programmer], because
>> it eliminates the problem of which variables lambda-expressions use
>> (when they attempt to use variables from their surrounding context)"
>>
>> Unfortunately couldn't find a use-case where it is easier - while consenting it might be easier for the compiler to swallow.
>>
>> Could someone give an example, where lexical binding makes coding easier?
>
> Consider this rather obvious higher-order function:
>
> (defun addinator (a)
> (lambda (b)
> (+ a b)))
>
> ;; This doesn't work with dynamic binding, at all
> (funcall (addinator 3) 4)
>
> ;; This returns wrong result with dynamic binding
> (let ((a 42))
> (funcall (addinator 3) 4))
>
That's interesting, but can hand-over functions also with dynamic binding.
Do you have a real use-case where lexical-binding is superior?
Can't see goodies from lexical binding beside a simplification for the compiler.
next prev parent reply other threads:[~2013-10-13 7:54 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-12 17:56 DynamicBindingVsLexicalBinding Andreas Röhler
2013-10-12 18:35 ` DynamicBindingVsLexicalBinding Dmitry Gutov
2013-10-12 20:53 ` DynamicBindingVsLexicalBinding Drew Adams
2013-10-13 5:09 ` DynamicBindingVsLexicalBinding Thien-Thi Nguyen
2013-10-13 7:54 ` Andreas Röhler [this message]
2013-10-13 13:46 ` DynamicBindingVsLexicalBinding Kai Großjohann
2013-10-13 16:21 ` DynamicBindingVsLexicalBinding Drew Adams
2013-10-14 11:21 ` DynamicBindingVsLexicalBinding Phillip Lord
2013-10-14 13:45 ` DynamicBindingVsLexicalBinding Drew Adams
2013-10-14 16:05 ` DynamicBindingVsLexicalBinding Phillip Lord
2013-10-14 21:32 ` DynamicBindingVsLexicalBinding Kai Großjohann
2013-10-15 11:27 ` DynamicBindingVsLexicalBinding Phillip Lord
2013-10-15 20:43 ` DynamicBindingVsLexicalBinding Kai Großjohann
2013-10-16 12:57 ` DynamicBindingVsLexicalBinding Phillip Lord
[not found] ` <mailman.4127.1381928277.10748.help-gnu-emacs@gnu.org>
2013-10-16 14:26 ` DynamicBindingVsLexicalBinding Barry Margolin
[not found] ` <mailman.3929.1381681317.10748.help-gnu-emacs@gnu.org>
2013-10-14 11:27 ` DynamicBindingVsLexicalBinding Rustom Mody
2013-10-14 11:15 ` DynamicBindingVsLexicalBinding Phillip Lord
[not found] <mailman.3891.1381600459.10748.help-gnu-emacs@gnu.org>
2013-10-13 3:34 ` DynamicBindingVsLexicalBinding Barry Margolin
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