Generic FunctionPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.1
Unrevised from 10.0 to 10.1.
10.0 version

positionp

Arguments: other

Returns t if the argument is a position object and returns nil if it is not. See make-position.

Warning about positions created by the with-positions and with-positions-and-boxes

positionp should not be called on objects created by the macros with-positions and with-positions-and-boxes. The return value of those functions is undefined for objects created by the macros because type information for such objects is sacrificed to achieve the non-consing efficiency of stack allocation.


Copyright (c) 1998-2017, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 10.0 page.
Created 2017.2.15.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.1
Unrevised from 10.0 to 10.1.
10.0 version