[Rd] [R-devel] what are labels in struct sxpinfo_struct from Rinternals.h mean?

[Prof Brian Ripley]

Once again[*], you really should study the posting guide.  The 
documentation is the 'R Internals manual', and it does cover this.

fortunes::fortune(14) applies.

[*] After two postings on R-help which ignored it, one reply to which 
pointed out this manual.

On 22/08/2014 07:32, PO SU wrote:
>
> Dear Rdevelers,
>       The following struct is in the Rinternals.h. I want to know  the meanings of labels or names like "gp,mark,obj,named,trace....." . TKS!
>
>
> struct sxpinfo_struct {
>      SEXPTYPE type      :  5;/* ==> (FUNSXP == 99) %% 2^5 == 3 == CLOSXP
> 			     * -> warning: `type' is narrower than values
> 			     *              of its type
> 			     * when SEXPTYPE was an enum */
>      unsigned int obj   :  1;
>      unsigned int named :  2;
>      unsigned int gp    : 16;
>      unsigned int mark  :  1;
>      unsigned int debug :  1;
>      unsigned int trace :  1;  /* functions and memory tracing */
>      unsigned int spare :  1;  /* currently unused */
>      unsigned int gcgen :  1;  /* old generation number */
>      unsigned int gccls :  3;  /* node class */
> }; /*		    Tot: 32 */
>
>
>
>
> --
>
> PO SU
> mail: desolator88 at 163.com
> Majored in Statistics from SJTU
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford
1 South Parks Road, Oxford OX1 3TG, UK