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C++ compiling program which contain template classes


C++ compiling program which contain template classes

By : Yashitha Yasanga
Date : September 22 2020, 04:00 PM
hope this fix your issue Since template definitions can't break One Definition Rule, if duplicated, they should be accurate duplicates.
code :


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gcc error compiling templated classes with large number of template arguments

gcc error compiling templated classes with large number of template arguments


By : user3525502
Date : March 29 2020, 07:55 AM
around this issue I am having issue in compiling code having templated classes nested within other templated classes. The major templated class, called MyClass has 50 template arguments accepting a default class type called null_type_nn doing nothing specific. , From C++ 2003 Standard:
Compiling Java program with multiple classes on Linux

Compiling Java program with multiple classes on Linux


By : Robin Cui
Date : March 29 2020, 07:55 AM
it helps some times Ideally you would use a build system such as Maven, ANT, etc
If you are just compiling classes which are in the current working directory, and you have not used packages, you can quite happily use
code :
$ javac *.java
$ javac $(find . -name \*.java)
$ find . -name \*.java > ./java-files.txt
$ javac @./java-files.txt
netbeans not generating classes when build is issues, but the program runs when compiling

netbeans not generating classes when build is issues, but the program runs when compiling


By : Shaheed
Date : March 29 2020, 07:55 AM
this one helps. I found the solution for many people running into this issue. It is the missing eclipseLink Library
Program output with template and typedef classes

Program output with template and typedef classes


By : Jhonatan de Souza
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , That would be due to template ordering rules. Let's examine things more closely.
code :
int main(){
  E<>().K();  // Line 1.
  F<A>().K(); // Line 2.
  F<C>().K(); // Line 3.
  return 0;
}
// Primary template.
template <class D=A> class E{
public: typedef D T;
    void K()
    {
       cout<<"5";
    };
};

// Specialisation for A.
template <> class E<A>{
public:typedef C T;
    void K()
    {
        cout<<"6";
    };
};

// Specialisation for C.
template <>class E<C>{
public:typedef B T;
     void K()
     {
       cout<<"7";
     };
};
  E<>().K();  // Calls E<A>::K().
template <class W, class V=E<W> >
class F{
typedef typename V::T R;
public:
     void K()
     {
         V().K(); // Calls E<A>::K().
         W().K(); // Calls A::K().
         R().K(); // Calls C::K().
    };
};
template <class W, class V=E<W> >
class F{
typedef typename V::T R;
public:
     void K()
     {
         V().K(); // Calls E<C>::K().
         W().K(); // Calls C::K().
         R().K(); // Calls B::K().
    };
};
int main(){
  E<>().K();  // E<A>::K().
  F<A>().K(); // F<A, E<A>>::K() -> E<A>::K(), A::K(), C::K().
  F<C>().K(); // F<C, E<C>>::K() -> E<C>::K(), C::K(), B::K().
  return 0;
}
6613732
Java compiling and running a program which contains 2 classes in command line

Java compiling and running a program which contains 2 classes in command line


By : Davis Stillson
Date : March 29 2020, 07:55 AM
seems to work fine Ok, these classes are in packages, but your command line screens do not indicate that you have them in the folders that correspond to their packages. Rather than try to explain packages to you, I recommend that you remove the 'package' lines from both source files and try again.
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