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

This is the documentation for a snapshot of the master branch, built from commit 5a839fb07a.
PrevUpHomeNext

Tuple helper classes

Description

The TR1 Tuple provides 2 helper traits, for compile time access to the tuple size, and the element types.

Specification
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.


PrevUpHomeNext