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CppCompileError

(C++) Compile error

An error given to you by your compiler. It prevents your program from running. Prefer compile-time errors over run-time errors (see reference 1). The naming of these depends on the compiler.

For compile errors when using the Boost C++ Library see Boost compile errors.

Other errors

List of compile-time errors

Overview

syntax error
stray '\342' in program
[C++ Error] UnitMain.cpp(3): E2451 Undefined symbol 'cout']]
[C++ Error] UnitMain.cpp(34): E2268 Call to undefined function 'Assert'
[C++ Error] _algo.c(432): E2268 Call to undefined function 'rand'
Nasty boost::shared_ptr nasty compile error
[C++ Error] E2092 Storage class 'static' is not allowed here
[C++ Error] E2138 Conflicting type modifiers
[C++ Error] exception(78): E2141 Declaration syntax error
[C++ Error] checked_delete.hpp(32): E2450 Undefined structure 'MyStructure'
[C++ Error] _config.h(488): E2141 Declaration syntax error
'operator<<' not implemented in type 'ostream' for arguments of type 'std::string'

syntax error

A common newbie compile error. It means that the compiler could not parse a line of code. This means that you probably made a typo somewhere.

//Error program
const double x = (1.0/(2.0/(3.0/(4.0/5.0))); //Forgot a bracket
const double y = 5.0 + ; //Forgot to write somehing after the plus
for (unsigned int i=0; i<10; ++i)
{
  std::cout << "Hello world" << std::endl;
  //Forgot a closing accolade
  const double z = 8.0 //Forgot semicolon
  return 0;
}

Solution: read the code carefully.

Error: stray '\342' in program

I got this error in:

include <fstream>


int main()
{
  std::ofstream myOut("test.txt"); //ERROR
  return 0;
}

This code is perfectly fine... But I copied it from a Microsoft Word document. Therefore, it has RichText additions. This can be revealed using a plain-text editor (e.g. under LINUX use: 'more main.cpp'). In a plain-text editor this line looked like:

include <fstream>


int main()
{
  std::ofstream myOut(<E2><80><gC>test.txt<E2><80><gD>); //ERROR
  return 0;
}

So, the RichText-ed apostroph " should be replaced with a 'plain' apostroph.

[C++ Error] E2451 Undefined symbol 'cout'

This error occurs when the program does not know the command 'cout' (which is the reason why it thinks it is a 'symbol'(e.g. an integer). #include 'iostream.h' to solve this. See also the Hello World program.

[C++ Error] UnitMain.cpp(34): E2268 Call to undefined function 'Assert'

You must be cautious when defining your own assert statement. Especially when als #defineing your own #include guards. Therefore, do the following: - Check if your own assert statement header file can be found in the right folder - Give your #include guard an original name. Do not:

//NO!!!
ifndef assertH

define assertH


//Your assert
endif

But

ifndef BilderbikkelAssertH

define BilderbikkelAssertH


//Your assert
endif

For example, the assert statement used by the Boost C++ Library use the SAME #include guard! This can cause your own assert statement to not be included.

[C++ Error] _algo.c(432): E2268 Call to undefined function 'rand'

The compiler takes you to the header _algo.h, to the blue line below:

template <class _Distance>
inline _Distance __random_number(_Distance __n) {
ifdef _STLP_NO_DRAND48

  return rand() % __n;
else

  return lrand48() % __n;
endif

}

It cannot find rand when you are not using namespace std. I solved it by changing the blue line to

  return std::rand() % __n;

Nasty compile error with boost::shared_ptr

[C++ Error] shared_ptr.hpp(124): E2034 Cannot convert 'Y *' to 'BirdBase *'
[C++ Error] shared_count.hpp(82): E2450 Undefined structure 'sp_counted_impl_p<Y>'
[C++ Error] shared_count.hpp(82): E2315 'sp_counted_impl_p<Y>()' is not a member of 'sp_counted_impl_p<Y>', because the type is not yet defined
[C++ Error] shared_count.hpp(82): E2034 Cannot convert 'sp_counted_impl_p<Y> *' to 'sp_counted_base *'
[C++ Error] checked_delete.hpp(32): E2034 Cannot convert 'Y' to 'bool'

caused by:

//Removes the boost::shared_ptr<BirdBase> mMale from the class Couple
boost::shared_ptr<BirdBase> Couple::getMale()
{
  boost::shared_ptr<BirdBase> male(mMale);
  mMale.reset(0); //Set pointer to NULL
  return male;
}

The compile error is solved by changing this to:

//Removes the boost::shared_ptr<BirdBase> mMale from the class Couple
boost::shared_ptr<BirdBase> Couple::getMale()
{
  boost::shared_ptr<BirdBase> male(mMale);
  mMale.reset(); //Remove the 0
  return male;
}

[C++ Error] E2092 Storage class 'static' is not allowed here

When you make a class member variable static, then use the keyword static ONLY in the class declaration.

//Declaration
class MyClass
{
  static double myDouble;
  //Stuff
};
//Initialization
double MyClass::myDouble = 0.0;
//THIS ERROR: static double MyClass::myDouble = 0.0;

[C++ Error] E2138 Conflicting type modifiers

To quote the C++ Builder Help: 'This occurs when a declaration is given that includes more than one addressing modifier on a pointer or more than one language modifier for a function'. This can be due to, e.g.

you've made a class member function both static and const. Make it const if it does not modify the class its member variables.

[C++ Error] exception(78): E2141 Declaration syntax error

Takes you to the header exception to the line

_STLP_BEGIN_NAMESPACE

I do not know exactly what causes this, but I have observed the following: in my automatically created Unit, I had the following code:

//---------------------------------------------------------------------------
ifndef UnitParametersH

define UnitParametersH

//---------------------------------------------------------------------------
class Parameters
{
  //Stuff
};
void Dot(const Parameters& parameters) //Forgot semicolon!!!
endif

After adding the semicolon, it worked again.

[C++ Error] checked_delete.hpp(32): E2450 Undefined structure 'MyStructure'

Your compiler will take you to this line:

template<class T> inline void checked_delete(T * x)
{
    // intentionally complex - simplification causes regressions
    typedef char type_must_be_complete[ sizeof(T)? 1: -1 ]; //This line
    (void) sizeof(type_must_be_complete);
    delete x;
}

Congratulations, as you have just let boost find out a nasty run-time error for you [1], thanks to boost::checked_delete. It is caused by you forward declaring a class in a header file, without #including the class's header file in the implementation (.cpp) file. After #including it the error is gone.

See boost::checked_delete why you otherwise would have had a nasty run-time error.

[C++ Error] _config.h(488): E2141 Declaration syntax error

You are taken to the line below, in the header file exception

_STLP_BEGIN_NAMESPACE

This is caused by a combination of a #include guard and a function declaration without a terminating semicolon ;, e.g. in the code below:

ifndef UnitHelperH

define UnitHelperH

  void sayHello() //FORGOT SEMICOLON[/b]
endif

Add the semicolon and everything will be fine.

'operator<<' not implemented in type 'ostream' for arguments of type 'std::string'

Caused by the following simple code:

include <iostream>

include <vector>


int main()
{
  std::string s = "Hello";
  std::cout << s;
}

The answer is to #include <string>, which contains the definition of the function lacking.

include <iostream>

include <vector>

#include <string>
int main()
{
  std::string s = "Hello";
  std::cout << s;
}

References

1) Herb Sutter and Andrei Alexandrescu. C++ coding standards: 101 rules, guidelines, and best practices. ISBN: 0-32-111358-6. Chapter 14: 'Prefer compile- and link-time errors to run-time errors'.

last edited (July 3, 2007) by bilderbikkel, Number of views: 16122, Current Rev: 23 (Diff)

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