Generates XS code to import C header constants, allowing Perl modules to AUTOLOAD constants defined in C library header files. Generally, you should not touch ExtUtils::Constant functions, since they are already implemented by h2xs.
For example:
use ExtUtils::Constant qw (WriteConstants); WriteConstants( NAME => `Nate', NAMES => [qw(Nate Nathan Nathaniel)], # not Nat ); # Generates wrapper code to make the values of the constants # Nate Nathan Nathaniel available to perl
Currently, this module understands the following types, although h2xs may only know a subset. The sizes of the numeric types are chosen by the Configure script at compile time.
IV
Signed integer. At least 32 bits.
UV
Unsigned integer. The same size as IV
.
NV
Floating-point type. Probably double
. Possibly long double
.
PV NUL[L]
Terminated string. Length will be determined with strlen
.
PVN
A fixed-length thing, given as a pointer, length pair. If
you know the length of a string at compile time, you can use
this instead of PV
.
SV
A mortal SV.
YES
Truth (PL_sv_yes
). The
value is not needed (and is ignored).
NO
Defined falsehood (PL_sv_no
). The value is not needed
(and is ignored).
UNDEF
The value of the macro is not needed.
ExtUtils::Constant implements the following functions.
18.222.168.163