executing code in a String!

[v4vijayakumar@yahoo.com]

How i can execute c++ code in a String?

for example,
string code = "cout << \"hi\" << endl;";
execute(code);

How i can implement that "execute(std::s tring code)" function?

[Alf P. Steinbach]

Re: executing code in a String!

* v4vijayakumar@y ahoo.com:[color=blue]
> How i can execute c++ code in a String?
>
> for example,
> string code = "cout << \"hi\" << endl;";
> execute(code);
>
> How i can implement that "execute(std::s tring code)" function?[/color]

There's no such functionality provided by the language or its standard
library.

But you could a C++ interpreter, provided it has some 'eval' hook.

Google for that (or, as I recall Wikipedia had an informative page).

--
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[benben]

Re: executing code in a String!

v4vijayakumar@y ahoo.com wrote:[color=blue]
> How i can execute c++ code in a String?
>
> for example,
> string code = "cout << \"hi\" << endl;";
> execute(code);
>
> How i can implement that "execute(std::s tring code)" function?
>[/color]

// Just to give an idea:

void execute(std::st ring str)
{
std::ofstream o("temp.cpp") ;
o << "#include <everything.hpp >"
<< "int main(){" << str << "}";

o.close();

system("g++ temp.cpp");
system("a.out") ;
}


Regards,
Ben