I'm hoping this isn't too off topic, but I'm not sure if I've included some
of my member functions in the right class. I needed to develop numerous
functions to help define object A. These functions currently exist in the
class definition for object A. The thing is, there is another object (B)
who's job it is to call these functions when the app starts up, defining all
possibilities for object A's, then allow future object A's to look up its
attributes from object B without having to re-compute them all over again.
This is a big cost savings. Now realizing that the functions mentioned
above only get called by object B (once), shouldn't they be defined in
object B? Or is this one of those 'same difference' kind of things?
d 3 1281
deancoo wrote: I'm hoping this isn't too off topic, but I'm not sure if I've included some of my member functions in the right class. I needed to develop numerous functions to help define object A. These functions currently exist in the class definition for object A. The thing is, there is another object (B) who's job it is to call these functions when the app starts up, defining all possibilities for object A's, then allow future object A's to look up its attributes from object B without having to re-compute them all over again. This is a big cost savings. Now realizing that the functions mentioned above only get called by object B (once), shouldn't they be defined in object B? Or is this one of those 'same difference' kind of things?
It seems that the functions you're talking about are part of some kind of
initialisation process and really don't belong to any class, except, maybe
the one that uses them. Now, it would seem that some kind of A's static
initialiser is what you need. Without knowing more of your model, it is
rather impossible to be sure, but have you tried
class A {
class A_initialiser {
public:
A_initialiser() { // do all the stuff here
}
};
static A_initialiser a_init;
public:
// blah blah
};
A::A_initialise r A::a_init; // definition
Now, you could either rely on the initialisation of this static data
member of the class A (like above), or have your B do
class B {
// blah
void initialise_A() {
static A_initialiser a_init; // need to make that class
// A_initialiser public in A or make
// B a friend of A
}
};
which will allow you to control the time (or the event) of the A's class-
wide initialisation.
V
"Victor Bazarov" <v.********@com Acast.net> wrote in message
news:bX******** ***********@new sread1.mlpsca01 .us.to.verio.ne t... deancoo wrote: I'm hoping this isn't too off topic, but I'm not sure if I've included some of my member functions in the right class. I needed to develop numerous functions to help define object A. These functions currently exist in the class definition for object A. The thing is, there is another object (B) who's job it is to call these functions when the app starts up, defining all possibilities for object A's, then allow future object A's to look up its attributes from object B without having to re-compute them all over again. This is a big cost savings. Now realizing that the functions mentioned above only get called by object B (once), shouldn't they be defined in object B? Or is this one of those 'same difference' kind of things?
It seems that the functions you're talking about are part of some kind of initialisation process and really don't belong to any class, except, maybe the one that uses them. Now, it would seem that some kind of A's static initialiser is what you need. Without knowing more of your model, it is rather impossible to be sure, but have you tried
class A { class A_initialiser { public: A_initialiser() { // do all the stuff here } };
static A_initialiser a_init; public: // blah blah };
A::A_initialise r A::a_init; // definition
Now, you could either rely on the initialisation of this static data member of the class A (like above), or have your B do
class B { // blah void initialise_A() { static A_initialiser a_init; // need to make that class // A_initialiser public in A or make // B a friend of A } };
which will allow you to control the time (or the event) of the A's class- wide initialisation.
V
Hmmm, interesting. So after you do a 'class wide' initialization, what
happens to a new instance of the class?
"deancoo" <s2*******@yaho o.ca> wrote... "Victor Bazarov" <v.********@com Acast.net> wrote in message news:bX******** ***********@new sread1.mlpsca01 .us.to.verio.ne t... deancoo wrote: I'm hoping this isn't too off topic, but I'm not sure if I've included some of my member functions in the right class. I needed to develop numerous functions to help define object A. These functions currently exist in the class definition for object A. The thing is, there is another object (B) who's job it is to call these functions when the app starts up, defining all possibilities for object A's, then allow future object A's to look up its attributes from object B without having to re-compute them all over again. This is a big cost savings. Now realizing that the functions mentioned above only get called by object B (once), shouldn't they be defined in object B? Or is this one of those 'same difference' kind of things?
It seems that the functions you're talking about are part of some kind of initialisation process and really don't belong to any class, except, maybe the one that uses them. Now, it would seem that some kind of A's static initialiser is what you need. Without knowing more of your model, it is rather impossible to be sure, but have you tried
class A { class A_initialiser { public: A_initialiser() { // do all the stuff here } };
static A_initialiser a_init; public: // blah blah };
A::A_initialise r A::a_init; // definition
Now, you could either rely on the initialisation of this static data member of the class A (like above), or have your B do
class B { // blah void initialise_A() { static A_initialiser a_init; // need to make that class // A_initialiser public in A or make // B a friend of A } };
which will allow you to control the time (or the event) of the A's class- wide initialisation.
V
Hmmm, interesting. So after you do a 'class wide' initialization, what happens to a new instance of the class?
Didn't you say that every instance of the class is supposed to use the
values resulted from the initialisation. So, every instance accesses
the values in 'a_init' and consumes them as needed.
V This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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