How do I calculate the number native functions in Rebol3?
(help native! prints native functions in lib but it does not return a block of words.)
UPDATE: I have corrected the question after the error highlighted by @HostileFork.
A catalog of natives (or at least words of their names) is built at boot time:
>> length? system/catalog/natives
== 160
There are more definitions in lib than just native routines. Definitions of typesets and other things. But almost every native is accessible through it at startup:
>> natives: []
>> foreach [word value] lib [if native? :value [append natives word]]
>> length? natives
== 168
A few of those differences are accounted for by synonyms (Q for QUIT, --- for COMMENT, etc):
>> difference natives system/catalog/natives
== [native action q ! min max --- bind? pwd context]
NATIVE and ACTION are special and for whatever reason do not make it into the catalog.
(Note that in current evolutions of the Ren-C build of Rebol3, there is only one FUNCTION! datatype. So there is no NATIVE? or ACTION? etc. Hence, system/catalog/natives is your only way to find this out.)