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Re: stdcxx compilation error

by Liviu Nicoara :: Rate this Message:

Templates are good. :-)

The compiler complains that it cannot match what you gave it
(std::map<key, value, std::less<key> >) with the actual type
(std::map<key, value, custom_comparator>). To directly answer your
question, it is an incorrect use of a template type, flagged by a
compliant compiler, and the code in the "for" loop is "bad".

Nadine Faizant wrote:

>
> Thanks, I notice that. What I want to know, is it forbidden by VC or
> the STL or the use of template. Sorry, but I love c++ but hate template...
> so I don't know if the code is bad or not... :-(
>
> ----- Original Message ----- From: "Liviu Nicoara" <nicoara@...>
> To: <stdcxx-user@...>
> Sent: Thursday, November 16, 2006 5:04 PM
> Subject: Re: stdcxx compilation error
>
>
>> At a glance it appears that in the for loop you create a const
>> iterator for:
>>
>> std::map< key, value >
>>
>> which uses the default std::map comparator (std::less<key>) whereas
>> the actual type of "compounds" is:
>>
>> std::map< key, value, CompareBoWTokenPtr >
>>
>> HTH.
>>
>> Nadine Faizant wrote:
>>> Hello,
>>>
>>> I try to compile this code with stdcxx (code which compile with gcc +
>>> gccstl).
>>>
>>> I don't understand why I get an error
>>>
>>> void toto(const SentenceCompoundsData& compounds) const
>>> ** for (std::map< Common::BagOfWords::BoWToken*, std::deque<
>>> PhoenixGraphVertex > >::const_iterator
>>> compoundsIt(compounds.begin());compoundsIt != compounds.end();
>>> compoundsIt++)
>>>
>>> {
>>>
>>> .....
>>>
>>> }
>>>
>>> }
>>>
>>>
>>> where SentenceCompoundsData is defined as
>>> typedef std::map< Common::BagOfWords::BoWToken*, std::deque<
>>> PhoenixGraphVertex >, CompareBoWTokenPtr > SentenceCompoundsData;
>>>
>>> OUTPUT : see attached file (error point to line **)
>>>
>>> I dont' know if it is a problem of STL or more a problem of
>>> compilation. If I try this, it works.
>>>
>>> for (SentenceCompoundsData ::const_iterator
>>> compoundsIt(compounds.begin());compoundsIt != compounds.end();
>>> compoundsIt++)
>>>
>>> Thanks for help,
>>>
>>> Nadine
>>>
>>>
>>> --------------------------------------------------------------------------------
>>>
>>>
>>> Nadine Faizant NewPhenix Z.A. - 5, Rue de l'Auberte 30 133 Les Angles
>>> Tél : 04 90 26 74 82 Fax : 04 90 26 90 84 Courriel :
>>> nadine.faizant@...
>>> --------------------------------------------------------------------------------
>>>
>>>
>>
>>
>
>
>

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