Dereferencing custom variables?

[Zdravko Beykov]

Hi guys, is there a way to dereference defines in your .hx code?

Like for example if I have <set name="customvar" value="blabla"/> in project.xml , how can I (if I can at all), do something like trace( $customvar ), to get "blabla"

Yours,

Ozdy

[Dan Korostelev]

One (or even the only?) way to do it is with macro, like that:

class Main

{

    static function main()

    {

        trace(getMyDef());

    }

    static macro function getMyDef()

    {

        return macro $v{haxe.macro.Context.definedValue("mydef")};

    }

}

вторник, 4 февраля 2014 г., 17:50:31 UTC+4 пользователь Zdravko Beykov написал:

[dlots]

An explanation with regards to if this is logically feasible with a shorthand at runtime would be nice.

With regards to accomplishing the same thing at runtime effectively, would be to wrap dereferenced variables in objects. Pretty annoying to do for local variables though.

[Dan Korostelev]

I can't understand what are you talking about, but that example has no runtime overhead if you're talking about that. Macro call is replaced by a value of "mydef".

вторник, 4 февраля 2014 г., 23:49:26 UTC+4 пользователь dlots написал:

[dlots]

I'm talking about a shorthand for reflection on a local variable. Something that's generally available only scripting/interpreted languages.

var test:Int=0;
var prop:String="test";
trace(&prop);

Not really possible unless you presumably auto wrap test into an object and execute Reflect.field on object. 

[Luca]

How on earth does that have anything to do with the original question regarding -D defines?

[dlots]

lol, it doesn't. i just sort of blurted it out.

[Carlos Madrazo]

Hi. Thanks for this. First I tried it but I got 

"You cannot access the flash package while in a macro (for flash.display.Bitmap)" on the getMyDef() line

but got the workaround here http://www.openfl.org/archive/community/programming-haxe/build-fails-when-using-macro/

:D

On Tuesday, February 4, 2014 9:53:47 AM UTC-5, Dan Korostelev wrote: