 | | | AS 2.0: enumerations? | AS 2.0: enumerations? 2004-03-14 - By Metanet Software
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hi,
i'm just about to take the plunge and start using AS 2.0 for my next
project.
one "trick" i use quite frequently in AS 1 is "enumerations" using
compile-time constants:
OBJTYPE_BOX = 1;
OBJTYPE_DOOR = 2;
this lets me write slightly-more-friendly code such as:
if(obj.type == OBJTYPE_BOX)
instead of
if(obj.type == 1)
and, it runs JUST as fast since the compiler knows the value of OBJTYPE_BOX
at compile-time, and it replaces all instances of OBJTYPE_BOX with the value
1.
now, the real problem with this type of "enumeration" is that it's not
actually supported; in AS 2, if i want a function to take an "OBJTYPE" as a
parameter or return an "OBJTYPE", will i have to just define the
parameter/return type as "Number"? or is there are support for enumerations?
raigan
p.s - i realize that i could define a class OBJTYPE, each instance of the
class having a single .value number, BUT the problem with this is that it's
much slower: i want something that will compile down to a literal value like
"1" and won't involve any slow get-the-valuue-of-this-variable bytecode.
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