sxpinfo_struct: struct sxpinfo_struct

In ramiromagno/c3po: From C to R and back again

Description

\Sexpr[results=rd, stage=render]{c3po:::badge('struct')} \Sexpr[results=rd, stage=render]{c3po:::badge('USE_RINTERNALS')}

struct sxpinfo_struct is a struct of 13 members:

• SEXPTYPE type

• unsigned int scalar

• unsigned int obj

• unsigned int alt

• unsigned int gp

• unsigned int mark

• unsigned int debug

• unsigned int trace

• unsigned int spare

• unsigned int gcgen

• unsigned int gccls

• unsigned int named

• unsigned int extra

struct sxpinfo_struct is used in the definition of SEXPREC_HEADER.

Declaration

struct sxpinfo_struct {
  SEXPTYPE type      :  TYPE_BITS;
  /* ==> (FUNSXP == 99) %% 2^5 == 3 == CLOSXP
   * -> warning: `type' is narrower than values
   *              of its type
   * when SEXPTYPE was an enum */
  unsigned int scalar:  1;
  unsigned int obj   :  1;
  unsigned int alt   :  1;
  unsigned int gp    : 16;
  unsigned int mark  :  1;
  unsigned int debug :  1;
  unsigned int trace :  1;  /* functions and memory tracing */
  unsigned int spare :  1;  /* used on closures and when REFCNT is defined */
  unsigned int gcgen :  1;  /* old generation number */
  unsigned int gccls :  3;  /* node class */
  unsigned int named : NAMED_BITS;
  unsigned int extra : 32 - NAMED_BITS; /* used for immediate bindings */
}; /*     Tot: 64 */

In Rinternals.h.

See Also

SEXPTYPE, SEXPREC_HEADER, SEXPREC,

ramiromagno/c3po documentation built on Jan. 5, 2021, 8:01 p.m.