One can easily declare functions, variables and types as deprecated
by using the "deprecated" attribute, but what about macros?
In GNU MPFR's mpfr.h we have the following compatibility macros:
#define GMP_RNDN MPFR_RNDN
#define GMP_RNDZ MPFR_RNDZ
#define GMP_RNDU MPFR_RNDU
#define GMP_RNDD MPFR_RNDD
for old programs that are still using GMP_RNDx instead of the new
MPFR_RNDx, where the MPFR_RNDx values are defined in an enum. We
would like to have a warning emitted when GMP_RNDx is used.
I'm wondering what is possible to do.
Since MPFR_RNDx are defined by:
typedef enum {
MPFR_RNDN=0, /* round to nearest, with ties to even */
MPFR_RNDZ, /* round toward zero */
MPFR_RNDU, /* round toward +Inf */
MPFR_RNDD, /* round toward -Inf */
MPFR_RNDA, /* round away from zero */
MPFR_RNDF, /* faithful rounding (not implemented yet) */
MPFR_RNDNA=-1 /* round to nearest, with ties away from zero (mpfr_round) */
} mpfr_rnd_t;
the following triggers a warning when a GMP_RNDx is used:
typedef int mpfr_gmp_rnd_t __attribute__
((deprecated ("GMP_RNDx is deprecated, use MPFR_RNDx instead")));
#define GMP_RNDN ((mpfr_rnd_t) (mpfr_gmp_rnd_t) MPFR_RNDN)
#define GMP_RNDZ ((mpfr_rnd_t) (mpfr_gmp_rnd_t) MPFR_RNDZ)
#define GMP_RNDU ((mpfr_rnd_t) (mpfr_gmp_rnd_t) MPFR_RNDU)
#define GMP_RNDD ((mpfr_rnd_t) (mpfr_gmp_rnd_t) MPFR_RNDD)
But could this have drawbacks or is there something more direct?
--
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
