On 01/06/2022 18:05, Mark Waddingham via use-livecode wrote:
Anyway, this rather odd and obscure facet of the language will
disappear in 10 as we've made it so that initializers for constants
and locals can be constant expressions. Thus:
constant kTrue = TRUE
local sEmptyString = empty
Will do precisely what they look like they should do...
Good.
Also, you'll be able to do things like:
constant kPiBy2 = pi / 2
constant kPiBy2Squared = kPiBy2 * kPiBy2
constant kPiBy2String = format("%f", kPiBy2)
local sPiMap = { "pi-by-2": kPiBy2, "pi-by-2-sq": kPiBy2Squared }
Very good. In fact, great !! Thank you!
Would you be ale to do something like
constant kPiMap = { ... as above ... }
And now I'll push my luck and ponder the possibility of 'global' constants.
OK - 'global constant' is likely counter to the scope concepts. But
perhaps they could be done as "write-once" variables, or as a more
general "write-protected' variable.
e.g.
(somewhere in a start-up script ...)
put 17 into gkMyMagicValue
writeprotect "gkMyMagicValue"
and any *subsequent* attempt to change the value would fail.
P.S. Amusingly, your question came up on exactly the same day I
'finished' my patch for the above - it now awaits review which may
result in it not being quite finished ;)
Yes, coincidences do happen :-)
Thanks for the explanation Mark.
Alex.
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