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Compilation errors with RapidXML


Compilation errors with RapidXML

By : ElieGroux
Date : November 21 2020, 07:01 PM
I hope this helps you . I just noticed your errors relate to rapidxml.cpp. Where's that file come from??
RapidXML is a header-only library. There is no rapidxml.cpp, and rapidxml.hpp cannot be compiled on it's own - you just include it in your own files (like in main.cpp above) to use it.
code :


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RapidXML compilation error parsing string

RapidXML compilation error parsing string


By : Binal Mandavia
Date : March 29 2020, 07:55 AM
wish helps you The problem is that the char* returned from calling c_str() on a std::string is actually a const char* which is no good for the parse function (parsing actually changes the string that it parses in rapidXML). This means we need to copy the string before we parse it
code :
  xml_document<> doc;
  string str;                             // String you want to parse
  char* cstr = new char[str.size() + 1];  // Create char buffer to store string copy
  strcpy (cstr, str.c_str());             // Copy string into char buffer

  doc.parse<0>(cstr);                     // Pass the non-const char* to parse()

  // Do stuff with parsing

  delete [] cstr;                         // free buffer memory when all is finished
 rapidxml.hpp
 rapidxml_print.hpp
Compiling errors using RapidXML in C++ using Dev C++

Compiling errors using RapidXML in C++ using Dev C++


By : Raj
Date : March 29 2020, 07:55 AM
To fix the issue you can do I am parsing an XML file for my C++ project in Dev C++ and I have the following code in the rapidxml_iterators.hpp file: , Before you do anything else, try and remove the line:-
code :
#include "rapidxml_iterators.hpp"
Compiler won't let me return a rapidxml::xml_document, and reports errors in the header file

Compiler won't let me return a rapidxml::xml_document, and reports errors in the header file


By : Reza
Date : March 29 2020, 07:55 AM
Does that help Basically, RapidXML xml_document type is non-copyable. As the snippet you post shows (and the comment "No copying" implies), the copy constructor and assignment operator are private to force compiler errors.
You should either dynamically create one in your function, and return a pointer - or, make the function take a reference to an existing xml_document as an input.
code :
xml_document myFunc() 
{ 
  xml_document doc;
  ...
  return doc; 
}

xml_document d = myfunc();
void myFunc(xml_document &doc) 
{
  ... 
}

xml_document d;
myfunc(d);
xml_document *myFunc() 
{ 
  xml_document *doc = new xml_document();
  return doc; 
}

xml_document d = myfunc();
...
delete d;
How do I handle RapidXml errors?

How do I handle RapidXml errors?


By : Theresa
Date : March 29 2020, 07:55 AM
seems to work fine By default, RapidXML raises exceptions on parse errors; it doesn't assert (perhaps by assert you just meant the process aborts).
It is possible to configure RapidXML with your own error handler called rapidxml::parse_error_handler if you #define RAPIDXML_NO_EXCEPTIONS before including the RapidXML headers, and if such an error handler returns, RapidXML will call assert(0), but I suspect that you don't have that enabled and you just need to be catching the right exception.
code :
#include <iostream>
#include "rapidxml.hpp"
#include "rapidxml_utils.hpp"

int main()
{
    try
    {
        rapidxml::file<> xmlFile("test.xml");
        rapidxml::xml_document<> doc;
        doc.parse<0>(xmlFile.data());
    }
    catch (const std::runtime_error& e)
    {
        std::cerr << "Runtime error was: " << e.what() << std::endl;
    }
    catch (const rapidxml::parse_error& e)
    {
        std::cerr << "Parse error was: " << e.what() << std::endl;
    }
    catch (const std::exception& e)
    {
        std::cerr << "Error was: " << e.what() << std::endl;
    }
    catch (...)
    {
        std::cerr << "An unknown error occurred." << std::endl;
    }
}
Eval expression during compilation and treat runtime errors as compilation errors

Eval expression during compilation and treat runtime errors as compilation errors


By : Chris Jünger
Date : March 29 2020, 07:55 AM
Does that help As suggested in comments, Template Haskell is the way to do this. The function below handles the two cases:
code :
compileTime :: Lift a => Either String a -> Q Exp
compileTime (Right a) = lift a
compileTime (Left err) = fail err
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