[Boost-users] Re: boost::tuple problem

From: Franz Schnyder (fschnyder_at_[hidden])
Date: 2005-01-23 06:05:00

heroboy schrieb:
>  hello everyone, 
>  &nbsp;&nbsp;&nbsp; what's the difference between "tuple<int> t;"&nbsp; and&nbsp;&nbsp;" tuple<int> t();"

 "tuple<int> t;"
creates an instance of the type tuple<int>.
 "tuple<int> t();"
declares a function t() with return type tuple<int>. If the constructor
takes no argument you must create the instance without the brackets or
the compiler takes it as a function declaration

> why
>     tuple<int> t;
>     cout<<t;
> is ok.
> But
>     tuple<int> t();
>     cout<<t;
> make a link error.

the linker can't find the definition of the function "tuple<int> t()"

> I'm using vs.net2003__________________________________________________________________欢迎使用ACMAIL 邮件系统