Mercurial > octave
view scripts/miscellaneous/mustBeNonempty.m @ 31247:3dae836c598c
doc: Expand and edit documentation for memoization (bug #60860)
author | Arun Giridhar <arungiridhar@gmail.com> |
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date | Fri, 30 Sep 2022 06:38:59 -0400 |
parents | 796f54d4ddbf |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 2019-2022 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]))