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Updated notes with the results of PITA explorations into introspection.

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git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3911 542714f4-19e9-0310-aa3c-eee0fc999fb1
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Ray Greenwell
2006-03-04 00:37:23 +00:00
parent 5558ebd6ca
commit 15c258cdd4
1 changed files with 15 additions and 9 deletions
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src/as/com/threerings/README.txt
+15 -9
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@@ -97,13 +97,6 @@ Notes
constructor is not being passed an arg. You'd think this would be caught constructor is not being passed an arg. You'd think this would be caught
at compile time... at compile time...
- I'm a little shaky still about how I'm going to handle arrays. In
ActionScript all arrays (except ByteArray) are the same type: Array.
If class A is extended by B and C, the server could pass around an array of
A, filled with B and C elements. I would have no way on the client to
inspect an array like that and know to tell the server that it's an A[].
Punting completely on Arrays for now.
- The RENDER Event is dispatched prior to each rendering, it's - The RENDER Event is dispatched prior to each rendering, it's
basically like tick(): it gives anything that cares a chance to update basically like tick(): it gives anything that cares a chance to update
prior to being painted. It doesn't specify what the hell to listen on for prior to being painted. It doesn't specify what the hell to listen on for
@@ -119,7 +112,8 @@ Notes
- All methods must be marked with the 'override' keyword if they override - All methods must be marked with the 'override' keyword if they override
a method in their parent, except for toString(), even though it's defined a method in their parent, except for toString(), even though it's defined
for Object. Ya got me... for Object. Apparently those methods are 'magic' and are not really in
the base class. What an annoying inconsistency.
- 'protected' means something slightly different from java: other classes - 'protected' means something slightly different from java: other classes
in the same package cannot access protected members, only subclasses may: in the same package cannot access protected members, only subclasses may:
@@ -145,7 +139,7 @@ ActionScript
// I think arrays are just hashes, so probably you could store // I think arrays are just hashes, so probably you could store
// values at element 1.5 if you desired... // values at element 1.5 if you desired...
- Similarly, methods in String take Number arguments (wha?) when for character - Similarly, methods in String take Number arguments (wha?) for character
index positions. Totally nonsensical. index positions. Totally nonsensical.
- Hey! Array has two constructors! How can I do that? - Hey! Array has two constructors! How can I do that?
@@ -194,3 +188,15 @@ ActionScript
var b :Number = 3.3; var b :Number = 3.3;
} }
trace(b); // prints "3.3", even though we've left the loop trace(b); // prints "3.3", even though we've left the loop
- AS3.0 allows for a bit of introspection, using the function
flash.util.describeType(). The only problem is that if you pass in a Class
then it always says that it's final (I guess it's the class's Class). It
will dump information identical to the information given about an instance
except that the dynamic/final information is lost. This is preventing
me from correctly streaming arrays, as we need to know if the class
is final. I can't just pass an instance in because it may be a pain
to construct, it may even be unconstructable if the type of the array
is an interface. The adobe forums are broken right now, but I'm going
to post a request for enhancement so that we can get this information.