Re: Default constructor error

From	Ruben Safir <mrbrklyn@panix.com>
Newsgroups	comp.lang.c++
Subject	Re: Default constructor error
Date	2011-05-20 23:37 +0000
Organization	PANIX Public Access Internet and UNIX, NYC
Message-ID	<ir6u09$or$2@reader1.panix.com> (permalink)
References	<ir3j67$486$2@reader1.panix.com> <ir677e$t3e$1@dont-email.me>

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Andrey Tarasevich <andreytarasevich@hotmail.com> wrote:
> On 5/19/2011 10:14 AM, Ruben Safir wrote:
>> I'm getting this warning that appears in the 4.6 GCC compiler that didn't
>> happen before.
>>
>> the warning is
>>
>> /home/ruben/cplus/link_list_template_mysql/stats.h|45 col 42| warning:
>> converting to non-pointer type ?int? from NULL [-Wconversion-null]
>>
>> if comes from a default constructor
>>
>>        Distribution():freq(NULL), occurances(0){};
>>
>>
>>
>> occurances is an int type, and the compiler is complaining about
>> occurances(0)
> 
> What makes you think that it complains about `occurances` specifically? 
> My first guess would be that it is complaining about `freq(NULL)`.
> 

Because it says so specifically that the error is at occurances.  It
says error at line# col#

>> it goes away when I change it to
>>
>> Distribution():freq(NULL){
>>       occurances = 0;
>> };
>>
>>
>> but then it complains about freq which is of type T in a template
> 
> Well, again, my guess would be that the compiler was complaining about 
> `freq(NULL)` all the time. 

No that analysis is wrong.  The error message then changes and says it
is specifically and freq


> However, due to some quirk in the 
> implementation this version of the code does not produce the same 
> warning (even though the alleged issue is still there).
> 
> How is `freq` declared?
>

the problem is not freq, as a fact.  

Ruben

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Default constructor error Ruben Safir <ruben@mrbrklyn.com> - 2011-05-19 17:14 +0000
  Re: Default constructor error Victor Bazarov <v.bazarov@comcast.invalid> - 2011-05-19 13:46 -0400
  Re: Default constructor error Andrey Tarasevich <andreytarasevich@hotmail.com> - 2011-05-20 10:09 -0700
    Re: Default constructor error Ruben Safir <mrbrklyn@panix.com> - 2011-05-20 23:37 +0000
      Re: Default constructor error Victor Bazarov <v.bazarov@comcast.invalid> - 2011-05-21 13:25 -0400
      Re: Default constructor error drew@furrfu.invalid (Drew Lawson) - 2011-05-23 15:13 +0000

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