2.1.2.2.2. Var Class Usage
void FunctionWithoutLeaks (void) {
    // All strings must be allocated using specific functions
    String_var vSmartPointer = string_dup ("A string ...");

    // Except assignment from const string which copies
    const char *pConstPointer = "A const string ...";
    vSmartPointer = pConstPointer;

    // Assignment releases rather than overwrites
    vSmartPointer = string_dup ("Another string ...");

    // Going out of scope releases too
    throw (0);
}