Raw limitation

[Aquilifer]

I can use the Raw feature with strings to fix backslashes as backslashes and NOT escape sequences. But if I don't know the string at coding time (say I want the user to supply a string) and I use the name of the string, R"(name)" returns to me name. Is there a way to get the Raw functionality for strings which are input after the program is finished.

[helios]

Huh? If the user enters a backslash then it gets written into the string as a backslash, period. No other interpretation is needed.

#include <iostream>
#include <string>

int main(){
    std::string line;
    std::getline(std::cin, line); //type in a backslash
    if (line == "\\")
        std::cout << "The input is a backslash!\n";
    std::cout << line << std::endl;
}

[Aquilifer]

hi helios;
What I have found is that a '\' written into a string is interpreted by c++ as an escape sequence \x where x is any alpha character. Raw changes that situation so that a backslash is just a backslash character. Then I hope to be able to change them into forward slashes, as Visual c++ complains when a directory string contains backslashes.

I am using CString as my input type, and I cannot get the CString Replace function to recognize either \ or \\ alone. \x works, but then it also changes every additional instance of x.

All help is appreciated

[JLBorges]

#include <iostream>
#include <afx.h>
#include <string>

int main()
{
    std::string str ; 
    std::cin >> str ; // enter: H\e\l\l\o\\W\o\r\l\d\!

    CString mstr = str.c_str() ;

    std::cout << mstr << '\n' ; // H\e\l\l\o\\W\o\r\l\d\!

    mstr.Replace( "\\\\", "  " ) ;
    std::cout << mstr << '\n' ; // H\e\l\l\o  W\o\r\l\d\!

    mstr.Replace( '\\', '.' ) ;
    std::cout << mstr << '\n' ; // H.e.l.l.o  W.o.r.l.d.!
    
    mstr.Remove('.') ;
    mstr.Replace( "  ", " " ) ;
    std::cout << mstr << '\n' ; // Hello World!
}

http://rextester.com/MUGWKK14173

[Aquilifer]

To JL Borges
Thanks, this looks like it has a chance of working. However, how do you get CStrings to print out their contents. On my system it prints the CString address!!
Help greatly appreciated. I am using Visual C++; is that the problem???

[cire]

http://stackoverflow.com/questions/25811924/cstring-to-stdcout

[Aquilifer]

to JLBorges and cire

Thank you both very much. The final code looks a fair bit different in Microsoft Visual C++, but that is OK. I've just tested the adjusted code and it works very smoothly. Thanks again.