Clarify @ vs & when registering application functions

BlackMoons · 2013-08-26T13:33:03

Hi. I was wondering if I could get a little clarification on exactly what the difference between registering a function with & vs @? Ie: scriptEngine->RegisterObjectMethod("class", "void function(sometype &)", asMETHOD(class,function), asCALL_THISCALL); scriptEngine->RegisterObjectMethod("class", "void function(sometype @)", asMETHOD(class,function), asCALL_THISCALL); Just from messing around, It seems @ increments the object ref count for you while & does not (is that correct?) But @ works on types that don't have ref counting behavior too. Can you use @in or @out? or is @ always inout? Should I be using & or @ in general? Or does that depend on if its a value or reference type?

AngelCode Affiliates

Started by BlackMoons August 20, 2013 08:13 AM

11 comments, last by WitchLord 10 years, 7 months ago

WitchLord

4,834

August 23, 2013 09:39 PM

Just &, without in or out, will never make a copy of the object. It will always be the reference to the true object as the called function needs to be able to both read from and update the true object.

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BlackMoons

460

Author

August 26, 2013 07:00 AM

Ah, So when does SetEngineProperty(asEP_ALLOW_UNSAFE_REFERENCES, true) come into play?

Lead Coder/Game Designer for Brutal Nature: http://BrutalNature.com

WitchLord

4,834

August 26, 2013 01:33 PM

Manual: Custom options -> Language modifications -> asEP_ALLOW_UNSAFE_REFERENCES

Regards,

Andreas

AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

Clarify @ vs & when registering application functions

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