Mercurial > octave
view scripts/miscellaneous/mustBeNonempty.m @ 29358:0a5b15007766 stable
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2021.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 10 Feb 2021 09:52:15 -0500 |
parents | dd9efd873596 |
children | 7854d5752dd2 |
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######################################################################## ## ## Copyright (C) 2019-2021 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave is free software: you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} mustBeNonempty (@var{x}) ## ## Require that input @var{x} is nonempty. ## ## Raise an error if the input @var{x} is empty, as determined by ## @code{isempty (@var{x})}. ## ## @seealso{mustBeMember, mustBeNonzero, isempty} ## @end deftypefn function mustBeNonempty (x) if (nargin != 1) print_usage (); endif if (isempty (x)) label = inputname (1); if (isempty (label)) label = "input"; endif error ("%s must not be empty", label); endif endfunction %!test %! mustBeNonempty (42); %! mustBeNonempty ("Hello"); %! mustBeNonempty (Inf); %! mustBeNonempty (NaN); %!error <Invalid call> mustBeNonempty () %!error <input must not be empty> mustBeNonempty ([]) %!error <input must not be empty> mustBeNonempty ('') %!error <input must not be empty> mustBeNonempty (reshape ([], [0 3 3 3]))