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Groups > comp.lang.c++ > #91517
| From | "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: What a bug |
| Date | 2023-09-01 14:52 -0700 |
| Organization | A noiseless patient Spider |
| Message-ID | <uctmf0$1a97$1@dont-email.me> (permalink) |
| References | <uct7ch$3uope$1@dont-email.me> <uctjtv$r76$1@dont-email.me> |
On 9/1/2023 2:09 PM, Alf P. Steinbach wrote:
> On 2023-09-01 7:35 PM, Bonita Montero wrote:
>> I checked for some commandline options and I thought it would be the
>> best to map that through an unordered_map. I extracted this from my
>> application in the below code.
>>
>> #include <Windows.h>
>> #include <iostream>
>> #include <variant>
>> #include <unordered_map>
>>
>> using namespace std;
>>
>> int wmain( int argc, wchar_t **argv )
>> {
>> static unordered_map<wchar_t const *, DWORD>
>> const opts =
>> {
>> { L"--idle", IDLE_PRIORITY_CLASS },
>> { L"--below", BELOW_NORMAL_PRIORITY_CLASS },
>> { L"--above", ABOVE_NORMAL_PRIORITY_CLASS },
>> { L"--high", HIGH_PRIORITY_CLASS },
>> { L"--realtime", REALTIME_PRIORITY_CLASS }
>> };
>> auto mappedPrio = opts.find( "--high" );
>> if( mappedPrio == opts.end() )
>> return -1;
>> return 0;
>> }
>>
>> Why does my code have a bug and why doesn't mappedPrio
>> point to end() at the end?
>
> How did you get that to compile?
>
> With the compilation-spoiler fixed and the `-1` replaced with either
> `E_FAIL` or `EXIT_FAILURE` (for the latter include `<stdlib.h>`), the
> problem you're /probably/ talking about is why it doesn't work with your
> setup to compare pointers to string literals.
Yup.
> That's because the Holy
> Standard does not require string pooling. An easy fix is to use
> `wstring_view` as key (for that include `<string_view>`).
>
> - Alf
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What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-01 19:35 +0200
Re: What a bug "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-09-01 23:09 +0200
Re: What a bug "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-01 14:52 -0700
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-02 06:23 +0200
Re: What a bug Muttley@dastardlyhq.com - 2023-09-02 10:25 +0000
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-02 12:56 +0200
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-02 14:35 +0200
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-02 14:41 +0200
Re: What a bug Muttley@dastardlyhq.com - 2023-09-02 15:30 +0000
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-02 18:10 +0200
Re: What a bug "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-01 14:50 -0700
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-02 06:19 +0200
Re: What a bug "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-03 15:25 -0700
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-04 04:53 +0200
Re: What a bug "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-03 20:01 -0700
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-04 06:59 +0200
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-04 11:11 +0200
Re: What a bug "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-04 18:48 -0700
Re: What a bug "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-14 16:27 -0700
Re: What a bug scott@slp53.sl.home (Scott Lurndal) - 2023-09-04 14:24 +0000
Re: What a bug "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2023-09-18 16:20 -0700
Re: What a bug Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-09-04 18:43 -0400
Re: What a bug red floyd <no.spam.here@its.invalid> - 2023-09-04 17:36 -0700
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-05 05:49 +0200
Re: What a bug Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-09-06 12:00 -0400
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-06 19:46 +0200
Re: What a bug Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-09-06 14:44 -0400
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-07 04:51 +0200
Re: What a bug Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-09-06 23:54 -0400
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-07 06:58 +0200
Re: What a bug Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-09-07 11:08 -0400
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-07 17:56 +0200
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-07 18:04 +0200
Re: What a bug Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2023-09-07 19:35 -0400
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-07 17:46 +0200
Re: What a bug jak <nospam@please.ty> - 2023-09-02 23:15 +0200
Re: What a bug jak <nospam@please.ty> - 2023-09-03 23:17 +0200
Re: What a bug Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-03 17:37 -0700
Re: What a bug jak <nospam@please.ty> - 2023-09-05 11:01 +0200
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-05 11:12 +0200
Re: What a bug Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-05 03:04 -0700
Re: What a bug jak <nospam@please.ty> - 2023-09-07 01:18 +0200
Re: What a bug James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-09-08 00:09 -0400
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-05 11:11 +0200
Re: What a bug red floyd <no.spam.here@its.invalid> - 2023-09-05 20:53 -0700
Re: What a bug Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2023-09-05 21:14 -0700
Re: What a bug red floyd <no.spam.here@its.invalid> - 2023-09-06 17:51 -0700
Re: What a bug Bonita Montero <Bonita.Montero@gmail.com> - 2023-09-06 06:49 +0200
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