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elem.hpp File Reference

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Defines

#define BOOST_PP_TUPLE_ELEM(N, I, T)
 Expands to the I:th element of an N-tuple. More...

#define BOOST_PREPROCESSOR_TUPLE_ELEM(N, I, T)
 Obsolete. More...

Detailed Description

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Define Documentation

#define BOOST_PP_TUPLE_ELEM (  N,
I,
T    ) 
 

Expands to the I:th element of an N-tuple.

For example, 

  BOOST_PP_TUPLE_ELEM(2,1,(A,B))

expands to B.

Tuples can be used for representing structured data.

Examples of tuples: 

  2-tuple: (A, B)
  3-tuple: (1, 2, 3)
  4-tuple: (A B C, D, EF, 34)

See BOOST_PP_LIMIT_TUPLE.

#define BOOST_PREPROCESSOR_TUPLE_ELEM (  N,
I,
T    ) 
 

Obsolete.

Use BOOST_PP_TUPLE_ELEM().

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