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From: Nix <nix@esperi.org.uk>
To: David Engster <deng@randomsample.de>
Cc: Stephen Leake <stephen_leake@stephe-leake.org>, emacs-devel@gnu.org
Subject: Re: progmodes/project.el and search paths
Date: Thu, 13 Aug 2015 12:53:17 +0100	[thread overview]
Message-ID: <87lhdf1k2a.fsf@esperi.org.uk> (raw)
In-Reply-To: <87egj8y0wi.fsf@isaac.fritz.box> (David Engster's message of "Wed, 12 Aug 2015 17:36:13 +0200")

On 12 Aug 2015, David Engster verbalised:

> Stephen Leake writes:
>> - Search for all implementations of this method.
>>
>>     That's the language used by elisp cl-generic and eieio defclass. I
>>     just made this the default behavior for xref-find-definitions.
>>     Although that's not tested on eieio classes; I'll add that to my
>>     list.
>>     
>>     In Ada, it's called "functions that override primitive operations".
>>
>>     In C++, it's "functions that override a virtual function".
>>
>>     The terminology is different, but the underlying notion of runtime
>>     dispatch is the same.
>>
>>     We might want to customize the menu entry depending on the current
>>     programming language.
>
> As always, it is more complicated in C++ (overload vs override,
> namespaces, argument dependent lookup, etc.), but currently I don't
> worry too much about details. Getting the usual dispatch right would
> cover a lot of ground.

Quite. Given that name lookup can be literally arbitrarily complicated
in C++, the only way to get it guaranteed right there involves writing a
C++ compiler in elisp or compiler assistance -- and even that is kind of
hopeless, because of course CEDET has to routinely work with
uncompilable and only-partially-written buffers. (This is a fairly
strong argument *against* relying on the compiler, in fact -- we'll
always want something like Semantic, because we can tell it to be less
pedantic in its parsing, recover as much as possible from every parse
error, and so on.)

>> In C, these searches are simpler; the first three only return one
>> result.
>
> Aah, the joys of ANSI C. Our parser is actually pretty good for
> that. :-)

Now, of course, we have C11's _Generic to make things more interesting
:)

-- 
NULL && (void)



  reply	other threads:[~2015-08-13 11:53 UTC|newest]

Thread overview: 101+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-02 13:52 progmodes/project.el and search paths Eric Ludlam
2015-08-02 17:17 ` Dmitry Gutov
2015-08-03  1:19   ` Eric Ludlam
2015-08-03 16:16     ` Stephen Leake
2015-08-03 22:56       ` Dmitry Gutov
2015-08-08 13:07       ` Nix
2015-08-09  5:18         ` Stephen Leake
2015-08-09 12:17           ` David Engster
2015-08-09 15:55             ` Stephen Leake
2015-08-10 11:29               ` David Engster
2015-08-10 16:43                 ` Stephen Leake
2015-08-12 10:10                   ` David Engster
2015-08-12 13:49                     ` Stephen Leake
2015-08-12 15:36                       ` David Engster
2015-08-13 11:53                         ` Nix [this message]
2015-08-13 12:05                           ` Dmitry Gutov
2015-08-14 11:52                             ` Eric Ludlam
2015-08-14 22:30                               ` Dmitry Gutov
2015-08-15  0:48                                 ` Eric Ludlam
2015-08-15  7:05                                 ` Eli Zaretskii
2015-08-10 17:12             ` Nix
2015-08-03 22:47     ` Dmitry Gutov
2015-08-04 11:52       ` Eric Ludlam
2015-08-04 16:09         ` Dmitry Gutov
2015-08-03 13:49   ` David Engster
2015-08-03 14:09     ` Dmitry Gutov
2015-08-03 14:27       ` David Engster
2015-08-03 15:13         ` Dmitry Gutov
2015-08-03 21:35           ` David Engster
2015-08-03 23:21             ` Dmitry Gutov
2015-08-04  8:15               ` David Engster
2015-08-04 13:43               ` Eli Zaretskii
2015-08-04 18:05                 ` Dmitry Gutov
2015-08-04 18:16                   ` Eli Zaretskii
2015-08-04 18:41                     ` Dmitry Gutov
2015-08-04 19:23                       ` Eli Zaretskii
2015-08-04 19:40                         ` João Távora
2015-08-05  2:52                           ` Eli Zaretskii
2015-08-04 20:15                         ` Dmitry Gutov
2015-08-05  2:49                           ` Eli Zaretskii
2015-08-05  6:18                             ` Stephen Leake
2015-08-05 15:08                               ` Eli Zaretskii
2015-08-05 15:36                                 ` Dmitry Gutov
2015-08-05 16:31                                   ` Eli Zaretskii
2015-08-05 16:45                                   ` David Engster
2015-08-05 22:17                                     ` Dmitry Gutov
2015-08-06  7:56                                     ` Stephen Leake
2015-08-06  7:54                                   ` Stephen Leake
2015-08-05  9:42                             ` Dmitry Gutov
2015-08-05 15:23                               ` Eli Zaretskii
2015-08-05 15:31                                 ` Dmitry Gutov
2015-08-05 16:16                                   ` Eli Zaretskii
2015-08-06  6:44                                     ` Dmitry Gutov
2015-08-06  7:43                               ` Stephen Leake
2015-08-06 10:25                                 ` Dmitry Gutov
2015-08-06 14:27                                   ` Stephen Leake
2015-08-06 23:16                                     ` Dmitry Gutov
2015-08-07 14:10                                       ` Stephen Leake
2015-08-07 14:44                                         ` Dmitry Gutov
2015-08-03 16:35         ` Stephen Leake
2015-08-03 16:45           ` Eli Zaretskii
2015-08-03 21:07             ` Stephen Leake
2015-08-03 21:33               ` David Engster
2015-08-04  2:35               ` Eli Zaretskii
2015-08-03 15:09       ` Eli Zaretskii
2015-08-03 15:16         ` Dmitry Gutov
2015-08-03 15:29           ` Eli Zaretskii
2015-08-03 19:01             ` Dmitry Gutov
2015-08-03 19:19               ` Eli Zaretskii
2015-08-03 21:05                 ` Dmitry Gutov
2015-08-04 11:48         ` Eric Ludlam
2015-08-04 16:20           ` Dmitry Gutov
2015-08-03 16:25     ` Stephen Leake
2015-08-03 21:33     ` Stefan Monnier
2015-08-03 22:15       ` David Engster
2015-08-03 22:50         ` Dmitry Gutov
2015-08-04  7:13         ` Stefan Monnier
2015-08-04  8:13           ` David Engster
2015-08-05 13:42             ` Stefan Monnier
2015-08-06 11:27               ` {Spam?} " Eric Ludlam
2015-08-06 23:10                 ` Stefan Monnier
2015-08-07 11:18                   ` Eric Ludlam
2015-08-07 11:43                     ` David Engster
2015-08-07 12:17                       ` Dmitry Gutov
2015-08-07 12:40                         ` David Engster
2015-08-07 12:54                           ` Dmitry Gutov
2015-08-07 12:08                     ` Alexis
2015-08-04  9:40           ` Stephen Leake
2015-08-04 17:43             ` Dmitry Gutov
2015-08-04 19:49               ` Stephen Leake
2015-08-04 20:03                 ` Dmitry Gutov
2015-08-05  6:02                   ` Stephen Leake
2015-08-05  9:59                     ` Dmitry Gutov
2015-08-06  7:25                       ` Stephen Leake
2015-08-07 14:21                         ` Dmitry Gutov
2015-08-05  1:29   ` Eric Ludlam
2015-08-11 20:01     ` Dmitry Gutov
2015-08-12  0:49       ` Eric Ludlam
2015-08-12  7:25         ` project terminology Stephen Leake
2015-08-12  9:28         ` progmodes/project.el and search paths Dmitry Gutov
2015-12-29  2:00     ` Dmitry Gutov

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