Cannot call a function

Question

1.00/5 (1 vote)

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Hello,

I have this code :

EcosiaSearcher.h

C++

template <typename T, typename M>
	list<T> WINAPI do_search(string research, string parameters, void (M::*parse)(char* , list<T> &));

EcosiaSearcher.cpp

C++

template <typename T, typename M>
list<T> WINAPI EcosiaSearcher::do_search(string research, string parameters, void (M::*parse)(char*, list<T> &))
{
	...
	list<T> results;

	...

	parse((char*)r_buffer, results);

	...

	return results;
}

template list<EcosiaWebResult> WINAPI EcosiaSearcher::do_search(string research, string parameters, void (EcosiaWebHtmlParser::*parse)(char*, list<EcosiaWebResult> &));

And i try to call the function like this :

C++

return EcosiaSearcher::do_search<EcosiaWebResult>(research, parameters, _web_parser.parse);

Here is the signature of the function i want to point :

C++

void WINAPI parse(char* sz_buffer, list<EcosiaWebResult> &ls);

It doesn't work. I have this error :

C#

Severity	Code	Description	Project	File	Line	Suppression State
Error	C3867	'EcosiaWebHtmlParser::parse': non-standard syntax; use '&' to create a pointer to member	Ecosiana	d:\users\deckbsd\source\projects\ecosiana\ecosiana\ecosiawebsearcher.cpp	17

Thanks in advance for your time and answers :)

What I have tried:

I also tried :

return EcosiaSearcher::do_search<ecosiawebresult>(research, parameters, &EcosiaWebHtmlParser::parse);

...

Posted 29-May-16 23:54pm

salece

Updated 2-Jun-16 21:01pm

v2

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Comments

nv3 30-May-16 11:12am

And what was the error message on your second attempt, the one with the '&'?

Philippe Mori 2-Jun-16 15:12pm

C++ is not C#... If you use pointer to member function, then you need to save both the object and the member address. You cannot convert member function to free function or vice versa. However, using function object can help hide some details.

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KarstenK · Accepted Answer · 2016-06-01T21:20:00

Solution 1

It is clearly an error which the compiler detect and it yells also how to fix it.

Googling after the Error C3867 and there is explained some details to the syntax.

Because your function with global scopeI would use:

C++

do_search(research, parameters, &parse);

Posted 1-Jun-16 21:20pm

KarstenK

deck_bsd · Accepted Answer · 2016-06-02T21:01:00

Thanks all for your replies :)

Exactly C++ is not C# i did it correctly :

C++

template <typename typename="" m="">
list<t> WINAPI EcosiaSearcher::do_search(string research, string parameters, string page, M& parser, void (M::*parse)(char*, list<t> &))

</t></t></typename>

C++

(parser.*parse)((char*)r_buffer, results);

C++

template list<ecosiavideoresult> WINAPI EcosiaSearcher::do_search(string research, string parameters, string page, EcosiaVideoHtmlParser &parser, void (EcosiaVideoHtmlParser::*parse)(char*, list<ecosiavideoresult> &));
</ecosiavideoresult></ecosiavideoresult>

and the call :

C++

return EcosiaSearcher::do_search<ecosiawebresult>(research, parameters, ECOSIA_SEARCH_PAGE, _web_parser, &EcosiaWebHtmlParser::parse);
</ecosiawebresult>

best regards,