arrow

Calc Software Package for Number Calc

SYMBOL and NAME
    ->	- arrow operator

SYNOPSIS
    p -> X

TYPES
    p		pointer to an lvalue
    X		identifier

    return	lvalue

DESCRIPTION
    p->X returns the same as (*p).X.  Thus the current value of *p is
    to be an object of a type for which X identifies one element.
    p->X then returns the lvalue corresponding to that element of the
    value of *p.

    The expression *p.X will cause a runtime error since this is
    interpreted as *(p.X) in which p is expected to be an object of
    an appropriate type.

    Spaces or tabs on either side of -> are optional.

EXAMPLES
    ; obj pair {one, two}
    ; obj pair A, B
    ; p = &A
    ; p->one = 1; p->two = 2
    ; A
	    obj pair {1, 2}

    ; A->two = &B
    ; p->two->one = 3; p->two->two = 4

    ; *p->ptwo
	    obj pair {3, 4}

    ; B = {5,6}
    ; *p->two
	    obj pair {5, 6}


LIMITS
    none

LINK LIBRARY
    none

SEE ALSO
    address, dereference, isptr, dot

## Copyright (C) 1999  Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc 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 Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
##
## @(#) $Revision: 29.4 $
## @(#) $Id: arrow,v 29.4 2006/05/07 07:25:46 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/arrow,v $
##
## Under source code control:	1997/09/06 20:03:34
## File existed as early as:	1997
##
## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/