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78 lines
2.0 KiB
Plaintext
78 lines
2.0 KiB
Plaintext
SYMBOL and NAME
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-> - arrow operator
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SYNOPSIS
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p -> X
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TYPES
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p pointer to an lvalue
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X identifier
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return lvalue
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DESCRIPTION
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p->X returns the same as (*p).X. Thus the current value of *p is
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to be an object of a type for which X identifies one element.
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p->X then returns the lvalue corresponding to that element of of the
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value of *p.
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The expression *p.X will cause a runtime error since this is
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interpreted as *(p.X) in which p is expected to be an object of
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an appropriate type.
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Spaces or tabs on either side of -> are optional.
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EXAMPLES
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> obj pair {one, two}
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> obj pair A, B
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> p = &A
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> p->one = 1; p->two = 2
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> A
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obj pair {1, 2}
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> A->two = &B
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> p->two->one = 3; p->two->two = 4
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> *p->ptwo
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obj pair {3, 4}
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> B = {5,6}
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> *p->two
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obj pair {5, 6}
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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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address, dereference, isptr, dot
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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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## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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##
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## @(#) $Revision: 29.2 $
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## @(#) $Id: arrow,v 29.2 2000/06/07 14:02:33 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/arrow,v $
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##
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## Under source code control: 1997/09/06 20:03:34
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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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