void fart(int gas_desity);
void main()
{
for(int i = 0; i < 10000; i++) fart();
}
void fart(int gas_desity)
{
//...blah
}
Class pre-definition?
Author
You know how with functions, you can ''pre-define'' them?
example:
What you call a "pre-definition" is known as a declaration .
A type that has been declared but not defined is known as an incomplete type .
Example of class declaration : class player;
An incomplete type can be used as
However, you cannot create an actual instance of the type (variable, value member) until the type is fully defined, as its size is not known. There is no way around that, but there is a lot you can already do with a pointer to an incomplete type.
e.g. Bridge pattern / Pointer-to-implementation (pimpl) idiom.
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[edited by - Fruny on September 21, 2003 12:16:19 AM]
A type that has been declared but not defined is known as an incomplete type .
Example of class declaration : class player;
An incomplete type can be used as
- Parameter or return type in a function declaration : player foo( player f );
- As the associated type of a pointer or reference : player* foo;
However, you cannot create an actual instance of the type (variable, value member) until the type is fully defined, as its size is not known. There is no way around that, but there is a lot you can already do with a pointer to an incomplete type.
e.g. Bridge pattern / Pointer-to-implementation (pimpl) idiom.
[ Start Here ! | How To Ask Smart Questions | Recommended C++ Books | C++ FAQ Lite | Function Ptrs | CppTips Archive ]
[ Header Files | File Format Docs | LNK2001 | C++ STL Doc | STLPort | Free C++ IDE | Boost C++ Lib | MSVC6 Lib Fixes ]
[edited by - Fruny on September 21, 2003 12:16:19 AM]
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