Does C++ have "with" keyword like Pascal?

Question

with keyword in Pascal can be use to quick access the field of a record. Anybody knows if C++ has anything similar to that?

Ex: I have a pointer with many fields and i don't want to type like this:

if (pointer->field1) && (pointer->field2) && ... (pointer->fieldn)

what I really want is something like this in C++:

with (pointer)
{
  if (field1) && (field2) && .......(fieldn)
}

Answer 1

Probably the closest you can get is this: (Please don't downvote me; this is just an academic exercise. Of course, you can't use any local variables in the body of these artificial with blocks!)

struct Bar {
    int field;
};

void foo( Bar &b ) {
    struct withbar : Bar { void operator()() {
        cerr << field << endl;
    }}; static_cast<withbar&>(b)();
}

Or, a bit more demonically,

#define WITH(T) do { struct WITH : T { void operator()() {
#define ENDWITH(X) }}; static_cast<WITH&>((X))(); } while(0)

struct Bar {
    int field;
};

void foo( Bar &b ) {
    if ( 1+1 == 2 )
        WITH( Bar )
            cerr << field << endl;
        ENDWITH( b );
}

or in C++0x

#define WITH(X) do { auto P = &X; \
 struct WITH : typename decay< decltype(X) >::type { void operator()() {
#define ENDWITH }}; static_cast<WITH&>((*P))(); } while(0)

        WITH( b )
            cerr << field << endl;
        ENDWITH;