Re: What attributes of a programming language simplify its use?

From	Hans-Peter Diettrich <DrDiettrich1@netscape.net>
Newsgroups	comp.compilers
Subject	Re: What attributes of a programming language simplify its use?
Date	2022-12-08 21:42 +0100
Organization	Compilers Central
Message-ID	<22-12-012@comp.compilers> (permalink)
References	(1 earlier) <22-12-003@comp.compilers> <22-12-004@comp.compilers> <22-12-007@comp.compilers> <22-12-010@comp.compilers> <22-12-011@comp.compilers>

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On 12/8/22 2:53 AM, Keith Thompson wrote:
> Hans-Peter Diettrich <DrDiettrich1@netscape.net> writes:
>> On 12/6/22 6:56 PM, Keith Thompson wrote:
> [...]
>>>   "int int" is a syntax error.
>>
>> I could not find in the (older) C++ grammar why "int int" should be a
>> *syntax* error. Aren't both "int" and "long" simple-type-specifier's
>> which can occur multiple times in a decl-specifier-seq?
>
> No, there are specific rules that specify the way they can be used.
> In the 2011 ISO C standard standard (I use the draft from
> https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf), the valid
> type specifiers are listed in section 6.7.2.

Thanks for the link :-)

>      At least one type specifier shall be given in the declaration
>      specifiers in each declaration, and in the specifier-qualifier
>      list in each struct declaration and type name. Each list of type
>      specifiers shall be one of the following multisets (delimited
>      by commas, when there is more than one multiset per item);
>      the type specifiers may occur in any order, possibly intermixed
>      with the other declaration specifiers.

So let me repeat my questions:

- Why is "int int" a syntax error? "At least one..." allows for more
than one type-specifier in declaration-specifiers (6.7).

- What's "long int long"? My current (Arduino) C++ compiler doesn't flag
it as an error.

DoDi
[This is getting close to comp.lang.c but I'm OK with a little more
discussion of the design decisions in C's very messy declarations. -John]

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What attributes of a programming language simplify its use? gah4 <gah4@u.washington.edu> - 2022-12-01 14:20 -0800
  Re: What attributes of a programming language simplify its use? gah4 <gah4@u.washington.edu> - 2022-12-02 02:09 -0800
  Re: What attributes of a programming language simplify its use? Thomas Koenig <tkoenig@netcologne.de> - 2022-12-03 10:25 +0000
    Re: What attributes of a programming language simplify its use? Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2022-12-03 22:16 +0100
      Re: What attributes of a programming language simplify its use? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-12-06 09:56 -0800
        Re: What attributes of a programming language simplify its use? gah4 <gah4@u.washington.edu> - 2022-12-06 12:43 -0800
          Re: What attributes of a programming language simplify its use? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2022-12-07 10:14 +0000
        Re: What attributes of a programming language simplify its use? Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2022-12-07 12:13 +0100
          Re: What attributes of a programming language simplify its use? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-12-07 17:53 -0800
            Re: What attributes of a programming language simplify its use? Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2022-12-08 21:42 +0100
              Re: What attributes of a programming language simplify its use? gah4 <gah4@u.washington.edu> - 2022-12-08 14:44 -0800
                Re: C types, was What attributes of a programming language simplify its use? Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2022-12-09 15:01 +0100
              Re: C types, was What attributes of a programming language simplify its use? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2022-12-08 18:35 -0800
              Re: C types, was What attributes of a programming language simplify its use? David Brown <david.brown@hesbynett.no> - 2022-12-09 13:21 +0100
        Re: What attributes of a programming language simplify its use? gah4 <gah4@u.washington.edu> - 2022-12-12 00:00 -0800
      Re: C types, was What attributes of a programming language simplify its use? "marb...@yahoo.co.uk" <marblypup@yahoo.co.uk> - 2022-12-09 07:40 -0800
        Re: C types, was What attributes of a programming language simplify its use? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2022-12-11 10:45 +0000
        Simple to implement and to use Christopher F Clark <christopher.f.clark@compiler-resources.com> - 2022-12-11 19:41 +0200
  Re: What attributes of a programming language simplify its use? Christopher F Clark <christopher.f.clark@compiler-resources.com> - 2022-12-03 23:33 +0000
    Re: What attributes of a programming language simplify its use? gah4 <gah4@u.washington.edu> - 2022-12-03 17:15 -0800

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