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obj/pa - Reference a parent object

CONTENTS

Synopsis
Description
Error Handling
Examples
See Also
Author

obj/pa write, ![object]
obj/pa write

Returns a pointer to the parent of the given object in the write register. If no object argument is provided, returns a pointer to the parent of the context root (PCTX).

A runtime error is generated if an argument is the wrong type, or if the referenced object does not exist, or if the object does not have a parent.

obj/pa P0, ![.prose.code.default]
	Returns a pointer to the .prose.code node, which is the parent of .prose.code.default and stores the result in register P0.
obj/pa PUSH
	Looks up the parent of PCTX and pushes the result onto the stack.

pal_commands(5), pal_registers(5), pal_indices(5), obj_addr(5), obj_child(5), reg_load(5),
PROSE Assembly Language at prose.sourceforge.net.

Copyright (c) 2002-2017 Mark R. Bannister <cambridge@users.sourceforge.net>.

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