mystruct->myfunc(mystruct, arg1, arg2);

myns.myfunc(mystruct, arg1, arg2);

CoolStruct * mystruct = myns.new_CoolStruct();

myns.myfunc(mystruct, arg1, arg2);

myns.del_CoolStruct(mystruct);

typedef struct coolstruct CoolStruct;

struct coolstruct {

    char ** keyset1;

    char ** keyset2;

    bool ok;

    char * (*transform)(CoolStruct *, int);

};





// Yes, I realize sizeof is an operator - not a function.

// I usually use parens with sizeof just for clarity.

CoolStruct * mystruct = malloc(sizeof(CoolStruct));



// Some stuff happens here to assign mystruct->keyset1

// and mystruct->keyset2. 





// Now we make a decision based on some arbitrary criteria.

if (mystruct->keyset1[0][0] == '~') {

    mystruct->transform = some_function;

}

else {

    mystruct->transform = some_other_function;

}