/************************************************************************************************************************
*This module contain attributes used to mark components.
*Currently only two attributes are supported:
* - optional: mark component as optional for system update
* - readonly: mark component access as read only (used for multithreading)
*
*By default components are required and mutable. "const" attribute can be used insteac od readonly mark.
*ex.
*Struct EntitiesData
*{
*   Comp1[] cmp; //mutable required component
*   @readonly @optional Comp2[] cmp2; //optional read only component
*   @optional const (Comp3)[] cmp3; //same as cmp2
*}
*/
module ecs.attributes;

///Used to mark optional components for system.
enum optional = "optional";
///Used to mark readonly components for system. "const" can be used insted.
enum readonly = "readonly";