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64 lines
1.8 KiB
Plaintext
64 lines
1.8 KiB
Plaintext
NAME
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isptr - whether a value is a pointer
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SYNOPSIS
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isptr(x)
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TYPES
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x any
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return 0, 1, 2, 3, or 4
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DESCRIPTION
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isptr(x) returns:
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0 if x is a not pointer
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1 if x is an octet-pointer
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2 if x is a value-pointer
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3 if x is a string-pointer
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4 if x is a number-pointer
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Pointers are initially defined by using the address (&) operator
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with an "addressable" value; currently, these are octets, lvalues,
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strings and real numbers.
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EXAMPLE
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; a = "abc", b = 3, B = blk()
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; p1 = &B[1]
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; p2 = &a
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; p3 = &*a
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; p4 = &*b
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; print isptr(a), isptr(p1), isptr(p2), isptr(p3), isptr(p4)
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0 1 2 3 4
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LIMITS
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none
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LINK LIBRARY
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none
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SEE ALSO
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isnum, isstr, isblk, isoctet
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## Copyright (C) 1999-2006,2021 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 1997/09/06 20:03:35
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## File existed as early as: 1997
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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