Re: "C++20 Modules ??? Complete Guide" by ??imon T??th

From	Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups	comp.lang.c++
Subject	Re: "C++20 Modules ??? Complete Guide" by ??imon T??th
Date	2021-09-14 09:55 -0700
Organization	None to speak of
Message-ID	<8735q7drlj.fsf@nosuchdomain.example.com> (permalink)
References	<shojj3$niq$2@dont-email.me> <shpk6q$hu3$1@einstein.home.woodall.me.uk> <117fe0fd-ffcf-4953-921c-4f3b245aa112n@googlegroups.com>

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Anand Hariharan <mailto.anand.hariharan@gmail.com> writes:
> On Tuesday, September 14, 2021 at 2:50:20 AM UTC-5, Tim Woodall wrote:
>> On 2021-09-13, Lynn McGuire <lynnmc...@gmail.com> wrote: 
>> > "C++20 Modules ??? Complete Guide" by ??imon T??th
>> > https://itnext.io/c-20-modules-complete-guide-ae741ddbae3d 
>> > 
>> > "Compilers and build systems are slowly starting to support C++20 
>> > modules. Perfect time for you to read this guide and benefit from the 
>> > massive compilation speedups. This article reflects the state as of 
>> > September 2021." 
>> >
>> Thanks for the link. 
>> 
>> I have a couple of quick questions. 
>> 
>> In the "module" example we have 
>> #include <iostream>; 
>> 
>> Is the semicolon required here? Subtle, hard to spot change if it is! 
>> 
>
> The code in the page was
>
>     import <iostream>;
>
> Code uses 'import' not 'include'; also the '#' is omitted.  In other words, no preprocessor at play.

And to answer the question, yes, the semicolon is required.

From the N4885 draft:

module-declaration :
    export-keyword[opt] module-keyword module-name module-partition[opt] attribute-specifier-seq[opt] ;

module-name :
    module-name-qualifier[opt] identifier

module-partition :
    : module-name-qualifier[opt] identifier

module-name-qualifier :
    identifier .
    module-name-qualifier identifier .

("module-keyword" is "module".  The "module", "import", and "export"
keywords are treated specially.)

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Philips
void Void(void) { Void(); } /* The recursive call of the void */

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"C++20 Modules — Complete Guide" by Šimon Tóth Lynn McGuire <lynnmcguire5@gmail.com> - 2021-09-13 17:33 -0500
  Re: "C++20 Modules ??? Complete Guide" by ??imon T??th Tim Woodall <news001@woodall.me.uk> - 2021-09-14 07:49 +0000
    Re: "C++20 Modules ??? Complete Guide" by ??imon T??th Anand Hariharan <mailto.anand.hariharan@gmail.com> - 2021-09-14 07:22 -0700
      Re: "C++20 Modules ??? Complete Guide" by ??imon T??th Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-09-14 09:55 -0700

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