Re: compiler error question

... or use boost::stringalgo::replace[Xxx] ;)

On Mon, May 31, 2010 at 9:32 PM, Anna-Jayne Metcalfe <[email protected]
> wrote:

>
>
>  Hi John,
>
>
>
> >  I need a function that adds an extra backslash to a file path that is
> returned by another function. I couldn't find any examples anywhere so I
> wrote one of my own and when I compile the code I get the following error:
>
>
>
> The error means that there are at least two overloaded versions of operator
> [] for that type, and the compiler can’t work out which one you want. As you
> don’t say whether you are working in C or C++ (or on which compiler) it’s
> hard to be more specific than that, but you might want to try changing your
> loop variable to type size_t.
>
>
>
> I would however say that if you are using C++ you really should look at
> using a string class (e.g. std::string for cross platform code, or CString
> for MFC/ATL code on Windows) for this rather than the C string handling API.
>
>
>
> For one thing, string libraries make such operations far easier
> (ATL::CString can do everything you seek in one line of code, for example).
> For another, you are less likely to unwittingly write code containing buffer
> overflow issues. Assuming I read what you are trying to do correctly, either
> of the following should work:
>
>
>
> void ReplaceSubstring(std::string& cpstrSource, const std::string&
> refcstrSearch, const std::string& refcstrReplace)
> {
>     std::string::size_type pos = 0;
>
>     while ( (pos = cpstrSource.find(refcstrSearch, pos) ) !=
> std::string::npos)
>     {
>         cpstrSource.replace(pos, refcstrSearch.length(), refcstrReplace);
>
>
>         pos += refcstrReplace.length();
>     }
> }
>
>
>
> std::string path("C:\\This\\is\\a\\test.exe");
>
>
>
> ReplaceSubstring(path, “\\”, “\\\\”);
>
>
>
>
>
> If you are writing in Visual C++ for Windows, ATL::CString can do this in
> one line of code:
>
>
>
> CString sPath(_T("C:\\This\\is\\a\\test.exe") );
>
>  sPath.Replace(_T(“\\”), _T(“\\\\”) );
>
>
>
> I hope the above helps. Of course, if all you were trying to do is add a
> single backslash to the end of the string that’s a whole lot easier:
>
>
>
> path += “\\”;
>
>
>
>
>
> Cheers,
>
>
>
>                 Anna x
>
>
>
>                 http://www.riverblade.co.uk
>
>                 MSN IM: [email protected] (don't ask!)
>
>                 Twitterings: http://twitter.com/annajayne
>
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>
>
>  
>