std-vla-p | ![]() |
Predicate if the Visual Lisp or Vital Lisp Runtime System is loaded, the system supports the VLA- extensions (Visual Lisp Automation) and if the function was called under this RTS or IDE. It can not be used to decide if the Runtime System is available at all, only if it is currently in effect.
Visual Lisp and Vital Lisp 3.0-3.2 supports it.
It's implemented using a special feature only available under these systems:
Currently if the function vla-Move is defined.
Cached version
This function is only called once, the result is stored in the global symbol *DEF-VLA*
. All subsequent calls just return a result dependent on the value of this symbol.
None
T or nil.
Works with the global symbol *DEF-VLA*.
Defined in STDINIT