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Re: int(*const parse_packet)(const char *, size_t, char **);

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On 8/31/2021 2:39 PM, Bart wrote:
> On 31/08/2021 22:32, Chris M. Thomasson wrote:
>> On 8/31/2021 2:08 PM, John Bode wrote:
>>> On 8/31/21 5:35 AM, hongy...@gmail.com wrote:
>>>> See the following c code snippet located at here [1]:
>>>>
>>>> typedef struct protocol {
>>>> const int default_port;
>>>> int(*const parse_packet)(const char *, size_t, char **);
>>>> } protocol_t;
>>>>
>>>> In the above definition, it seems to me that the `int ...' line is 
>>>> difficult to understand. Any hints will be highly appreciated.
>>>>
>>>> [1] 
>>>> https://github.com/hongyi-zhao/shadowsocksr-libev/blob/1be671bd5fe7cd55d3823d4669786c9ba7913b9e/src/protocol.h#L29 
>>>>
>>>>
>>>> Regards,
>>>> HY
>>>>
>>>
>>> When reading complex declarations, start by finding the leftmost
>>> identifier and work your way out, remembering the following rules:
>> [...]
>>
>> I must be misunderstanding you, however, I like to go from right to left:
>>
>> struct foo const* const p = &foo;
>>
>> p would be a constant pointer, to a constant foo structure.
>>
> 
> That doesn't work. Compare:
> 
>    const struct foo *p[];

Its just a habit of mine. Basically, its similar to:

https://cseweb.ucsd.edu//~ricko/rt_lt.rule.html



>    const struct foo (*p)[];
> 
> They can't both be array of pointer, and the 'const' shouldn't be at the 
> end.
> 
> What about:
> 
>    int A[10][20];
> 
> Is is array 20 of array 10, or the other way around?
> 
>  >> When reading complex declarations, start by finding the leftmost
>  >> identifier
> 
> This doesn't work either when there is no identifier (cast or unnamed 
> parameter).

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int(*const parse_packet)(const char *, size_t, char **); "hongy...@gmail.com" <hongyi.zhao@gmail.com> - 2021-08-31 03:35 -0700
  Re: int(*const parse_packet)(const char *, size_t, char **); Bonita Montero <Bonita.Montero@gmail.com> - 2021-08-31 12:59 +0200
    Re: int(*const parse_packet)(const char *, size_t, char **); "hongy...@gmail.com" <hongyi.zhao@gmail.com> - 2021-08-31 06:07 -0700
      Re: int(*const parse_packet)(const char *, size_t, char **); Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-08-31 08:01 -0700
  Re: int(*const parse_packet)(const char *, size_t, char **); Manfred <noname@add.invalid> - 2021-08-31 15:01 +0200
  Re: int(*const parse_packet)(const char *, size_t, char **); John Bode <jfbode1029@gmail.com> - 2021-08-31 16:08 -0500
    Re: int(*const parse_packet)(const char *, size_t, char **); "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-08-31 14:32 -0700
      Re: int(*const parse_packet)(const char *, size_t, char **); Bart <bc@freeuk.com> - 2021-08-31 22:39 +0100
        Re: int(*const parse_packet)(const char *, size_t, char **); "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-01 14:40 -0700
    Re: int(*const parse_packet)(const char *, size_t, char **); "hongy...@gmail.com" <hongyi.zhao@gmail.com> - 2021-08-31 18:21 -0700
      Re: int(*const parse_packet)(const char *, size_t, char **); Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-08-31 19:54 -0700
    Re: int(*const parse_packet)(const char *, size_t, char **); Kaz Kylheku <563-365-8930@kylheku.com> - 2021-09-01 05:07 +0000
      Re: int(*const parse_packet)(const char *, size_t, char **); "hongy...@gmail.com" <hongyi.zhao@gmail.com> - 2021-08-31 23:19 -0700
  Re: int(*const parse_packet)(const char *, size_t, char **); James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-09-01 10:34 -0400
    Re: int(*const parse_packet)(const char *, size_t, char **); Bart <bc@freeuk.com> - 2021-09-01 16:22 +0100
      Re: int(*const parse_packet)(const char *, size_t, char **); "hongy...@gmail.com" <hongyi.zhao@gmail.com> - 2021-09-01 20:02 -0700
        Re: int(*const parse_packet)(const char *, size_t, char **); Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-09-01 21:01 -0700
          Re: int(*const parse_packet)(const char *, size_t, char **); "hongy...@gmail.com" <hongyi.zhao@gmail.com> - 2021-09-01 23:18 -0700
          Re: int(*const parse_packet)(const char *, size_t, char **); scott@slp53.sl.home (Scott Lurndal) - 2021-09-02 15:02 +0000
            Re: int(*const parse_packet)(const char *, size_t, char **); Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2021-09-02 15:24 +0000
        Re: int(*const parse_packet)(const char *, size_t, char **); Bart <bc@freeuk.com> - 2021-09-02 10:40 +0100
  Re: int(*const parse_packet)(const char *, size_t, char **); Paul N <gw7rib@aol.com> - 2021-09-01 08:32 -0700

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