Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!elroy.jpl.nasa.gov!thyme!kaleb
From: kaleb@thyme.jpl.nasa.gov (Kaleb Keithley)
Newsgroups: comp.lang.c
Subject: Re: typedefs that need each other
Message-ID: <1991Jan15.190445.24609@thyme.jpl.nasa.gov>
Date: 15 Jan 91 19:04:45 GMT
References: <26261@uflorida.cis.ufl.EDU> <BURLEY.91Jan15115313@geech.ai.mit.edu>
Distribution: usa
Organization: Jet Propulsion Laboratory, Pasadena, CA
Lines: 40

In article burley@geech.ai.mit.edu (Craig Burley) and by inference
jdb@reef.cis.ufl.edu (Brian K. W. Hook) wrote:
>   Scenario:
>
>   typedef struct _struct1 {
>	   .....
>	   STRUCT2 *structure;
>	   .....
>   } STRUCT1;
>
>   typedef struct _struct2 {
>	   .....
>	   STRUCT1 *structure;
>	   .....
>   } STRUCT2;
>

K&R2 in section 6.7 Typedef (on page 146) shows exactly how to do this 
with typedefs, and the above example would be:

    typedef struct _struct2 *STRUCT2ptr

    typedef struct _struct1 {
        .....
        STRUCT2ptr structure;
        .....
    } STRUCT1;

    typedef struct _struct2 {
 	   .....
 	   STRUCT1 *structure;
 	   .....
    } STRUCT2;


-- 
Kaleb Keithley                      Jet Propulsion Labs
kaleb@thyme.jpl.nasa.gov

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