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Programming > C++ Moderated > Re: const point...
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Re: const pointer to class problem

by Oncaphillis <oncaphillis@[EMAIL PROTECTED] > Apr 18, 2008 at 06:13 AM

t.wanat@[EMAIL PROTECTED]
 wrote:

> When I try to compile, I get the error
> 'FOO::Version' cannot convert 'this' pointer from 'const FOO' to 'FOO
> &'
> 
> on the line containing fp->Version().
> 

You have to tell the compiler explicitly that
the Version() method does not alter the FOO
object since the PrintVer function gets a
const pointer.

Methods which really do notalter the internal
state of an object should always be declared
const like:

<snip>
int Version() const {
  ....
}

</snip>

Hope that helps

O.


-- 
      [ See http://www.gotw.ca/resources/clcm.htm
for info about ]
      [ comp.lang.c++.moderated.    First time posters: Do this! ]
 




 24 Posts in Topic:
const pointer to class problem
t.wanat@[EMAIL PROTECTED]  2008-04-17 19:33:58 
Re: const pointer to class problem
Ulrich Eckhardt <dooms  2008-04-18 05:05:12 
Re: const pointer to class problem
paradox <ksjetski@[EMA  2008-04-18 06:13:16 
Re: const pointer to class problem
Friedhelm Hoerner <f.h  2008-04-18 06:13:16 
Re: const pointer to class problem
kasthurirangan.balaji@[EM  2008-04-18 06:13:17 
Re: const pointer to class problem
Tony Delroy <tony_in_d  2008-04-18 06:13:15 
Re: const pointer to class problem
Chris Uzdavinis <cuzda  2008-04-18 06:13:17 
Re: const pointer to class problem
Christopher <cpisz@[EM  2008-04-18 06:13:18 
Re: const pointer to class problem
Oncaphillis <oncaphill  2008-04-18 06:13:15 
Re: const pointer to class problem
red floyd <no.spam@[EM  2008-04-18 06:13:16 
Re: const pointer to class problem
=?ISO-8859-1?Q?Daniel_Kr=  2008-04-18 06:13:19 
Re: const pointer to class problem
"Thomas J. Gritzan&q  2008-04-18 06:13:17 
Re: const pointer to class problem
Lionel B <me@[EMAIL PR  2008-04-18 06:13:18 
Re: const pointer to class problem
Gerhard Menzl <clcppm-  2008-04-18 06:13:17 
Re: const pointer to class problem
Thomas Lehmann <t.lehm  2008-04-18 17:16:36 
Re: const pointer to class problem
David Pol <david@[EMAI  2008-04-18 17:15:18 
Re: const pointer to class problem
rwf_20 <rfrenz@[EMAIL   2008-04-18 17:17:39 
Re: const pointer to class problem
Mathias Gaunard <loufo  2008-04-18 17:18:25 
Re: const pointer to class problem
Todd Mars <tamnt54@[EM  2008-04-18 17:18:24 
Re: const pointer to class problem
SeanW <sean_woolcock@[  2008-04-18 17:17:37 
Re: const pointer to class problem
"Jeff Baker" &l  2008-04-20 15:47:59 
Re: const pointer to class problem
"Jeff Baker" &l  2008-04-20 15:51:21 
Re: const pointer to class problem
"Jeff Baker" &l  2008-04-20 21:01:04 
Re: const pointer to class problem
Ulrich Eckhardt <dooms  2008-04-21 10:25:11 

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tan12V112 Tue Jul 8 23:18:37 CDT 2008.