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Editorial Team
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Asked: 2026-05-22T13:07:21+00:00

#include <iostream> #include <string> #include <regex> #include <ios> #include <locale> using namespace std; int

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#include <iostream>
#include <string>
#include <regex>
#include <ios>
#include <locale>

using namespace std;

int main () 
{

const wstring wstr(L"<(.|\\n)*?>");
static const wregex wr(wstr);
wstring line (L"<tag>Random text<tag>"); 
wstring line2 (L""); 
wcout << regex_replace<wchar_t>(line,wr,line2) << endl;

}

Compiler says:

ClCompile:
  html.cpp
c:\users\usr\documents\visual studio 2010\projects\html\html\html.cpp(34): error C2784: std::basic_string<_Elem> std::tr1::regex_replace(const std::basic_string<_Elem> &,const std::tr1::basic_regex<_Elem,_RxTraits> &,const std::basic_string<_Elem> &,std::tr1::regex_constants::match_flag_type): not able to output argument template "const std::tr1::basic_regex<_Elem,wchar_t> &" from "const std::tr1::wregex"
          c:\program files\microsoft visual studio 10.0\vc\include\regex(2739): look to typedef "std::tr1::regex_replace"
c:\users\usr\documents\visual studio 2010\projects\html\html\html.cpp(34): error C2784: std::basic_string<_Elem> std::tr1::regex_replace(const std::basic_string<_Elem> &,const std::tr1::basic_regex<_Elem,_RxTraits> &,const std::basic_string<_Elem> &,std::tr1::regex_constants::match_flag_type): not able to output argument template for "const std::tr1::basic_regex<_Elem,wchar_t> &" from "const std::tr1::wregex"
          c:\program files\microsoft visual studio 10.0\vc\include\regex(2739): look to  typedef of "std::tr1::regex_replace"
c:\users\usr\documents\visual studio 2010\projects\html\html\html.cpp(34): error C2784: std::basic_string<_Elem> std::tr1::regex_replace(const std::basic_string<_Elem> &,const std::tr1::basic_regex<_Elem,_RxTraits> &,const std::basic_string<_Elem> &,std::tr1::regex_constants::match_flag_type): not able to output argument template for "const std::tr1::basic_regex<_Elem,wchar_t> &" from "const std::tr1::wregex"
          c:\program files\microsoft visual studio 10.0\vc\include\regex(2739): look to  typedef "std::tr1::regex_replace"
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1 Answer

  1. Editorial Team

    Partial answer:

    You should use regex_repalce this way:

    wcout << regex_replace(line,wr,line2) << endl;

    i.e., without the wchar_t. The first argument is for the Element Traits class, which you’d only rarely want to modify.

    Edit

    I’ve checked your code with VC++ 2010. Changing the line as I specified allowed the code to compile, and return the result as expected. Can you try it again?

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