mirror of
https://github.com/lcn2/calc.git
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1a898caf3f
NOTE: errstr was renamed to errsym. Added errsym builtin function. The errsym(errnum | "E_STRING") builtin, , when given a valid integer errnum that corresponds to a calc error condition, will return an E_STRING string, AND when given a valid E_STRING string that is associated with a calc error condition, will return errnum integer that corresponds to a calc error condition. Supplying a non-integer numeric errnum code to error(), errno(), strerror(), or errsym() will result in an error.
56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
NAME
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iserror - test whether a value is an error value
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SYNOPSIS
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iserror(x)
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TYPES
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x any
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return zero or positive integer < 32768
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DESCRIPTION
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If x is not an error value, zero is returned.
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If x is an error value, iserror(x) returns its error type.
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EXAMPLE
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; a = error(99)
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print iserror(a), iserror(2 + a), iserror(2 + "a"), iserror(2 + 3)
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99 99 3 0
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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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errcount, errmax, errno, errorcodes, errsym, newerror, stoponerror, strerror
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isassoc, isatty, isblk, isconfig, isdefined, iseven, isfile,
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ishash, isident, isint, islist, ismat, ismult, isnull, isnum, isobj,
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isobjtype, isodd, isprime, isrand, israndom, isreal, isrel,
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issimple, issq, isstr, istype
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## Copyright (C) 1999-2006,2023 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: 1995/12/18 03:30:59
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## File existed as early as: 1995
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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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