Re: C++ istream / ostream equivalent ?

[Matthias Pleh]

Thank you for your reply and yes that works :)

Now i m facing with the following problem, what is the trick for input stream ?

( something like

std::istream&  operator>>(std::istream&  in,A&  a)
{
   //  A.someData<<  in;
   return in;
}

in C++ )

I m thinking of the situation when we want to load some data from a file.

The toString() trick is okay for saving the object... but how to load it back 
(something like fromString(char[]) would do the job but it does not exist in 
Object) ?

Anyway thank you, you solved half of my problem :)



Ther are many posibilities, depending on your further needs! Just have a 
look at the online dokumentation:
http://www.digitalmars.com/d/2.0/phobos/phobos.html

But my first try would be such ..
(note: I've leaved out error-handling ...)

module test;

import std.stdio;
import std.file;

class A
{
    void writeToFile()  { std.file.write("sample.txt",someData);   }
    void readFromFile() { someData=cast(string)read("sample.txt"); }
    void clear()        { someData="n/A\n"; }
    string toString()   { return someData;  }
private:
    string someData="Just some data.
With anohter line of date.
Even more data.!"; 
}

int main(string[] args)
{
        A a=new A;
        a.writeToFile();
        a.clear();
        writeln(a);
        a.readFromFile();
        writeln(a);
        return 0;
}