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Groups > comp.lang.c > #21590

Re: typedef struct

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Keith Thompson <kst-u@mib.org> wrote:

> John McDermick <johnthedspguy@gmail.com> writes:
> > If I have this definition in a header file:
> >
> > typedef struct A
> > {
> >    int test;
> > } B;
> >
> > What exactly is A and what is B ?

What if I want to create a pointer to the struct inside the struct?

typedef struct A {
    A *p1;   /* not allowed */
    B *p2;   /* not allowed */
} B;

This gives compilation errors. Is it possible to create a pointer to the
struct being defined, within the struct, using the original typedef and
thereby not having to code 'struct' to define the pointer?

> struct A {
>       struct A *p;
> };


> and then refer to it as "struct A".  There's no real need to use a
> typedef to give the type another name; it already has a perfectly good
> one.
> 
> (The counterargument is that many people like to have a one-word name
> for the type.)

My desire is simply to avoid having to create pointers as struct * inside
the structure. Other than that I would tend to agree.

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Re: typedef struct Kulin <remailer@reece.net.au> - 2012-05-31 19:10 +0000
  Re: typedef struct Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-05-31 15:14 -0400
    Re: typedef struct Nomen Nescio <nobody@dizum.com> - 2012-06-01 02:50 +0200
    Re: typedef struct 张源 西北工业大学 <zhabgyuan1993@gmail.com> - 2012-06-08 10:02 -0700
      Re: typedef struct Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-08 13:20 -0400
        Re: typedef struct 张源 西北工业大学 <zhabgyuan1993@gmail.com> - 2012-06-08 10:27 -0700
          Re: typedef struct Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-08 13:32 -0400
            Re: typedef struct 张源 西北工业大学 <zhabgyuan1993@gmail.com> - 2012-06-08 10:37 -0700
              Re: typedef struct Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-08 13:55 -0400
                Re: typedef struct Zhang Yuan <zhabgyuan1993@gmail.com> - 2012-06-08 11:22 -0700
                Re: typedef struct James Kuyper <jameskuyper@verizon.net> - 2012-06-08 14:35 -0400
                Re: typedef struct Zhang Yuan <zhabgyuan1993@gmail.com> - 2012-06-08 11:41 -0700
                Re: typedef struct Keith Thompson <kst-u@mib.org> - 2012-06-08 14:22 -0700
                Re: typedef struct Zhang Yuan <zhabgyuan1993@gmail.com> - 2012-06-08 18:28 -0700
                Re: typedef struct Zhang Yuan <zhabgyuan1993@gmail.com> - 2012-06-08 11:08 -0700
  Re: typedef struct Xavier Roche <xroche@free.fr.NOSPAM.invalid> - 2012-05-31 21:14 +0200
    Re: typedef struct 张源 西北工业大学 <zhabgyuan1993@gmail.com> - 2012-06-08 10:20 -0700
      Re: typedef struct James Kuyper <jameskuyper@verizon.net> - 2012-06-08 14:31 -0400
        Re: typedef struct Zhang Yuan <zhabgyuan1993@gmail.com> - 2012-06-08 11:45 -0700
          Re: typedef struct James Kuyper <jameskuyper@verizon.net> - 2012-06-08 15:10 -0400
            Re: typedef struct Zhang Yuan <zhabgyuan1993@gmail.com> - 2012-06-08 12:27 -0700
        Re: typedef struct Zhang Yuan <zhabgyuan1993@gmail.com> - 2012-06-08 11:48 -0700
  Re: typedef struct Keith Thompson <kst-u@mib.org> - 2012-05-31 14:24 -0700
    Re: typedef struct Nomen Nescio <nobody@dizum.com> - 2012-06-01 10:20 +0200
      Re: typedef struct Keith Thompson <kst-u@mib.org> - 2012-06-01 11:45 -0700
        Re: typedef struct Ian Collins <ian-news@hotmail.com> - 2012-06-02 07:52 +1200
        Re: typedef struct Ike Naar <ike@sverige.freeshell.org> - 2012-06-01 21:54 +0000
        Re: typedef struct "BartC" <bc@freeuk.com> - 2012-06-01 23:36 +0100
        Re: typedef struct Fritz Wuehler <fritz@spamexpire-201206.rodent.frell.theremailer.net> - 2012-06-02 23:31 +0200
          Re: typedef struct Keith Thompson <kst-u@mib.org> - 2012-06-02 18:30 -0700
        Re: typedef struct Robert Miles <milesrf@Usenet-News.net> - 2012-06-29 16:29 -0500
          Re: typedef struct Keith Thompson <kst-u@mib.org> - 2012-06-29 14:58 -0700
            Re: typedef struct Robert Miles <milesrf@Usenet-News.net> - 2012-07-01 22:55 -0500
              Re: typedef struct Keith Thompson <kst-u@mib.org> - 2012-07-01 23:00 -0700
                Re: typedef struct James Kuyper <jameskuyper@verizon.net> - 2012-07-02 07:12 -0400

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