C++/Tcl

C++/Tcl
A C++ library for interoperability between C++ and Tcl

Quick Start

The C++/Tcl library allows to easily integrate these two languages.
It is easy to both extend the Tcl interpreter and to embed the Tcl interpreter in a regular C++ code.

Hello World (extending Tcl)

Let's take the following C++ file:

// example1.cc

#include "cpptcl.h"
#include <iostream>

using namespace std;

void hello()
{

     cout << "Hello C++/Tcl!" <<
endl;

}

CPPTCL_MODULE(Mymodule, i)
{
i.def("hello", hello);
}

After compiling (let's suppose that the resulting shared library is named mymodule.so), we can do this:

$ tclsh
% load ./mymodule.so
% hello
Hello C++/Tcl!

% for {set i 0} {$i != 4} {incr i} { hello }

Hello C++/Tcl!

Hello C++/Tcl!

Hello C++/Tcl!

Hello C++/Tcl!

%

In other words, the Tcl interpreter was extended with the loadable module (which is a shared library) that provides the definition of new command.

Hello World (embedding Tcl)

Let's take the following C++ program:

// example2.cc



#include "cpptcl.h"

#include <iostream>

#include <string>



using namespace std;

using namespace Tcl;



void hello()

{

     cout << "Hello C++/Tcl!" << endl;

}



int main()

{

     interpreter i;

     i.def("hello", hello);



     string script = "for {set i 0} {$i != 4} {incr
i} { hello }";



     i.eval(script);

}

After compiling, it gives the following result:

$ ./example2

Hello C++/Tcl!

Hello C++/Tcl!

Hello C++/Tcl!

Hello C++/Tcl!

$

In other words, the Tcl interpreter exists in a C++ application as a regular object.
It is possible to define new commands in this interpreter and execute arbitrary Tcl scripts in it, so that C++ and Tcl communicate with each other.

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