Re: [Boost-users] boost::xpressive Error 2668 call to amibous function

Subject: Re: [Boost-users] boost::xpressive Error 2668 call to amibous function
From: Jens Saathoff (jensesaat_at_[hidden])
Date: 2011-09-07 17:13:51

Yes, shame on me. using namespace boost::xpressive; was the only i added,
not ref.

Thank you very much!

2011/9/7 niXman <i.nixman_at_[hidden]>

> Hi Jens!
>
> you need a ref() function from namespace boost::xpressive.
> like this: http://liveworkspace.org/code/a5de4abb522fb95f5636640af604b349
>
> Regards! niXman.
>
> 2011/9/8 Jens Saathoff <jensesaat_at_[hidden]>
>
>> Hi!
>>
>> I get the error C2668 if i try to compile the following code(xpressive
>> example from docs):
>>
>> #include <string>
>>
>> #include <iostream>
>>
>> #include <boost/xpressive/xpressive.hpp>
>>
>> #include <boost/xpressive/regex_actions.hpp>
>>
>> #include <map>
>>
>>  using namespace boost::xpressive;
>>
>>  int main()
>>
>> {
>>
>> 	std::map<std::string, int> result;
>>
>> 	std::string str("aaa=>1 bbb=>23 ccc=>456");
>>
>>  	// Match a word and an integer, separated by =>,
>>
>> 	// and then stuff the result into a std::map<>
>>
>> 	sregex pair = ( (s1= +_w) >> "=>" >> (s2= +_d) )[ ref(result)[s1] = as<int>(s2) ];
>>
>>  	// Match one or more word/integer pairs, separated
>>
>> 	// by whitespace.
>>
>> 	sregex rx = pair >> *(+_s >> pair);
>>
>>  	if(regex_match(str, rx))
>>
>> 	{
>>
>> 		std::cout << result["aaa"] << '\n';
>>
>> 		std::cout << result["bbb"] << '\n';
>>
>> 		std::cout << result["ccc"] << '\n';
>>
>> 	}
>>
>>  	return 0;
>>
>> }
>>
>>
>>
>> The complete error:
>>
>> D:\Projekte\xpressive-test\main.cpp:29: Fehler:C2668: 'boost::xpressive::ref' : ambiguous call to overloaded function
>> D:\Frameworks\boost\boost_147\boost/xpressive/regex_actions.hpp(850): could be 'const boost::xpressive::reference<T> boost::xpressive::ref<std::map<_Kty,_Ty>>(T &)'
>> with
>> [
>>     T=std::map<std::string,int>,
>>     _Kty=std::string,
>>     _Ty=int
>> ]
>> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\xrefwrap(439): or       'std::tr1::reference_wrapper<_Ty> std::tr1::ref<std::map<_Kty,int>>(_Ty &)' [found using argument-dependent lookup]
>> with
>> [
>>     _Ty=std::map<std::string,int>,
>>     _Kty=std::string
>> ]
>> while trying to match the argument list '(std::map<_Kty,_Ty>)'
>> with
>> [
>>     _Kty=std::string,
>>     _Ty=int
>> ]
>>
>>
>>
>> What's the problem here?
>>
>>
>> Thank you very much!
>>
>>
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>>
>
>
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