###  | # Boost.Preprocessor ## Header <boost/preprocessor/tuple.hpp>

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Includes all tuple headers.

A tuple is a fixed size collection of elements.

In the preprocessor library, tuples are represented like macro parameter lists. Thus an element of a tuple can be any sequence of tokens that constitutes a single macro parameter.

Examples of tuples:

    (const, volatile)    // 2-tuple
    (*, /, %)            // 3-tuple
    (1, "2", '3', (4,5)) // 4-tuple

Tuples can be used for representing structured data.

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