Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
The TR1 Tuple provides 2 helper traits, for compile time access to the tuple size, and the element types.
tuple_size<T>::value
Requires: T
is any fusion sequence type, including tuple.
Type: MPL Integral Constant
Value: The number of elements in the sequence.
Equivalent to result_of::size<T>::type
tuple_element<I, T>::type
Requires: T
is any fusion sequence type, including tuple.
0 <=
I <
N or the program is ill formed.
Value: The type of the Ith
element of T. Equivalent
to result_of::value_at<I,T>::type