anytime when recursive function is calling, 'stageflags' marks with bit flag of
current stage and unmarks before return from this function.
'inlinecopy' uses similar 'stageflags' and from multiple evaluation 'doInline'
(with infinite recursion) of this expression.
anytime when recursive function is calling, 'stageflags' marks with bit flag of current stage and unmarks before return from this function. 'inlinecopy' uses similar 'stageflags' and from multiple evaluation 'doInline' (with infinite recursion) of this expression.