typing_ptr.cr

# Binding code
type Monitor = Void*
type Window  = Void*
type Cursor  = Void*


# My code
module Boleite
  # Forward declaration
  class RenderTarget
  end

  module Private
    class GLFWSurface < RenderTarget
      def initialize(@surface : LibGLFW3::Window)
      end

      def finalize()
        unless @surface.null?
          LibGLFW3.destroyWindow(@surface)
          @surface = Pointer(Void).null # Will make @surface a union of LibGLFW3::Window | Pointer(Void)
          @surface = LibGLFW3::Window.null # Doesn't work because null is not defined for the type Window.
        end
      end
    end
  end
end