Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.c++ > #82775
| From | Manfred <invalid@invalid.add> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: Inline functions and locals |
| Date | 2022-01-14 17:30 +0100 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <srs8fc$l6p$1@gioia.aioe.org> (permalink) |
| References | <srmvu4$oie$1@gioia.aioe.org> <srqkvk$3vi$1@dont-email.me> <srrmd6$1bo0$1@gioia.aioe.org> <9915792f-a355-47bd-8a1d-9a74e88cb4a4n@googlegroups.com> |
On 1/14/2022 1:02 PM, Öö Tiib wrote:
> On Friday, 14 January 2022 at 13:22:31 UTC+2, Mut...@dastardlyhq.com wrote:
>> On Thu, 13 Jan 2022 17:51:45 -0800
>> Andrey Tarasevich <andreyta...@hotmail.com> wrote:
>>> On 1/12/2022 8:34 AM, Mut...@dastardlyhq.com wrote:
>>>> I'm curious as to why returning a reference to a local inside an inline
>>>> function isn't (apparently) allowed. eg:
>>>>
>>>> #include <iostream>
>>>> #include <string>
>>>>
>>>> using namespace std;
>>>>
>>>> inline string &func()
>>>> {
>>>> string s = "hello";
>>>> return s;
>>>> }
>>>>
>>>>
>>>>
>>>> int main()
>>>> {
>>>> cout << func() << endl;
>>>> return 0;
>>>> }
>>>>
>>>> This causes a compilation warning with clang and when run prints out garbage
>>>> as you'd expect if it were a non inline. However surely if the function is
>>>> truly inline it should work.
>>>
>>> Um... You are seriously confused. This is a rather widespread
>>> misconception that keyword `inline` has something to do with "inlining"
>>> function code at the call site.
>>>
>>> 1. "Declaring function as inline" and "embedding (inlining) function
>>> code at a specific call site" are two completely different, independent,
>>> unrelated things. In your example you simply declared a function as
>> Wikipedia says otherwise:
>>
>> https://en.wikipedia.org/wiki/Inline_function
>>
>> "It serves as a compiler directive that suggests (but does not require) that
>> the compiler substitute the body of the function inline by performing inline
>> expansion, i.e. by inserting the function code at the address of each function
>> call,"
>>
>> Perhaps you're the one who's getting confused?
>
> Wikipedia is (in kind of populist/politician manner) saying very same thing
> that Andrey said. Read the Wikipedia article carefully (and as whole).
> Does the sentence you quoted say that functions that you have declared
> inline will be inlined, ever?
>
Moreover, if someone wants to learn programming from Wikipedia, good
luck to them. But don't expect me to trust their code.
James Kuyper gave very clear explanations of the OP's mistake.
Back to comp.lang.c++ | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Inline functions and locals Muttley@dastardlyhq.com - 2022-01-12 16:34 +0000
Re: Inline functions and locals Bonita Montero <Bonita.Montero@gmail.com> - 2022-01-12 17:38 +0100
Re: Inline functions and locals James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-01-12 12:47 -0500
Re: Inline functions and locals Juha Nieminen <nospam@thanks.invalid> - 2022-01-13 07:00 +0000
Re: Inline functions and locals "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-01-13 10:45 +0100
Re: Inline functions and locals Juha Nieminen <nospam@thanks.invalid> - 2022-01-17 12:55 +0000
Re: Inline functions and locals David Brown <david.brown@hesbynett.no> - 2022-01-17 15:14 +0100
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-17 10:24 -0800
Re: Inline functions and locals David Brown <david.brown@hesbynett.no> - 2022-01-17 19:46 +0100
Re: Inline functions and locals Bonita Montero <Bonita.Montero@gmail.com> - 2022-01-13 11:08 +0100
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-13 19:30 -0800
Re: Inline functions and locals Paavo Helde <eesnimi@osa.pri.ee> - 2022-01-13 12:46 +0200
Re: Inline functions and locals Muttley@dastardlyhq.com - 2022-01-13 15:38 +0000
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-13 17:51 -0800
Re: Inline functions and locals Muttley@dastardlyhq.com - 2022-01-14 11:22 +0000
Re: Inline functions and locals Öö Tiib <ootiib@hot.ee> - 2022-01-14 04:02 -0800
Re: Inline functions and locals Manfred <invalid@invalid.add> - 2022-01-14 17:30 +0100
Re: Inline functions and locals Muttley@dastardlyhq.com - 2022-01-14 16:49 +0000
Re: Inline functions and locals Muttley@dastardlyhq.com - 2022-01-14 16:40 +0000
Re: Inline functions and locals Öö Tiib <ootiib@hot.ee> - 2022-01-14 11:28 -0800
Re: Inline functions and locals "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2022-01-14 20:29 +0100
Re: Inline functions and locals James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-01-14 08:34 -0500
Re: Inline functions and locals James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-01-14 11:26 -0500
Re: Inline functions and locals David Brown <david.brown@hesbynett.no> - 2022-01-14 18:47 +0100
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-14 08:43 -0800
Re: Inline functions and locals Juha Nieminen <nospam@thanks.invalid> - 2022-01-17 05:38 +0000
Re: Inline functions and locals David Brown <david.brown@hesbynett.no> - 2022-01-17 08:12 +0100
Re: Inline functions and locals "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-01-16 23:51 -0800
Re: Inline functions and locals "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2022-01-16 23:55 -0800
Re: Inline functions and locals David Brown <david.brown@hesbynett.no> - 2022-01-17 11:35 +0100
Re: Inline functions and locals Juha Nieminen <nospam@thanks.invalid> - 2022-01-17 09:50 +0000
Re: Inline functions and locals James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-01-17 14:39 -0500
Re: Inline functions and locals Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-01-17 15:34 -0800
Re: Inline functions and locals "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2022-01-17 15:50 -0800
Re: Inline functions and locals Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-04-25 03:42 -0700
Re: Inline functions and locals "james...@alumni.caltech.edu" <jameskuyper@alumni.caltech.edu> - 2022-04-25 08:48 -0700
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-16 23:53 -0800
Re: Inline functions and locals Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-01-17 15:29 -0800
Re: Inline functions and locals Bonita Montero <Bonita.Montero@gmail.com> - 2022-01-17 12:40 +0100
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-17 10:13 -0800
Re: Inline functions and locals James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-01-17 16:15 -0500
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-17 16:28 -0800
Re: Inline functions and locals James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-01-17 22:55 -0500
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-18 11:32 -0800
Re: Inline functions and locals James Kuyper <jameskuyper@alumni.caltech.edu> - 2022-01-18 19:03 -0500
Re: Inline functions and locals Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-01-18 17:22 -0800
Re: Inline functions and locals Bonita Montero <Bonita.Montero@gmail.com> - 2022-01-18 09:20 +0100
csiph-web