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71 lines
2.0 KiB
Plaintext
71 lines
2.0 KiB
Plaintext
NAME
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saveval - enable or disable saving of values
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SYNOPSIS
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saveval(arg)
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TYPES
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arg any
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return null value
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DESCRIPTION
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When evaluation of a line of statements at top level starts, a
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"saved value" for that line is assigned the null value. When saving
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is enabled (the initial state) and a statement being evaluated is an
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expression or a return statement, the value returned by that expression
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or statement replaces the current saved value; on completion of
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evaluation of the line, the saved value, if it is not null, updates
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the "oldvalue".
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This saving of values is enabled or disabled by calling saveval(arg)
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with an argument arg that tests as nonzero or zero,
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Whether saving is enabled or disabled does not affect the operation of
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eval(str).
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EXAMPLE
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; saveval(1);
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; a = 27;
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.
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27
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; saveval(0);
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; a = 45
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.
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27
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; saveval(1);
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; a = 63
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.
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63
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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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oldvalue, eval
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## Copyright (C) 1999 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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