CODEWITHSUNDEEP
apache-flexactionscript-3
TheOx
TheOx

Reputation: 2228

What does the double colon ('::') mean in Actionscript 3 / Flex?

I'm tasked with updating a Flex project created by an outside contractor and in the Actionscript is the following chunk:

CONFIG::FLASH_10_1
{
    //Some code here
}

I've never seen this type of structure before and I'm having a heck of a time trying to search for it on Google - I've found what it means in just about every programming language except AS3. Can anyone shed some light on this?

Upvotes: 3

Views: 2545

Answers (3)

Triynko
Triynko

Reputation: 19194

Although this is not the same context, to answer the question of what double colon "::" means in AS3...

It is a namespace accessor.

For example, the AS3 Vector.<T> type actually has a runtime type name of __AS3__.vec::Vector.<T>, where __AS3__.vec is the custom namespace. You can also use custom namespaces for members and access them on objects in AS3 using the syntax object.custom_namespace::membername. public and private are built in namespaces, so technically you could access public members like object.public::membername, as in:

var a:Array = [0,1];
trace(a.public::length); //prints 2

Upvotes: 4

Rion Williams
Rion Williams

Reputation: 76577

Not a flex / AS3 guru - this thread talks about the '::' being used as a "Namespace accessor":

Thread on Actionscript FAQs

Upvotes: 2

JeffryHouser
JeffryHouser

Reputation: 39408

I'm pretty sure this relates to the conditional compilation features of the Flex compiler.

So, if you add a compiler argument, like this:

-define=CONFIG::FLASH_10_1

I bet that error will go away.

Upvotes: 7

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