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< title > BOOST_PP_ENUM_TRAILING< / title >
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The < b > BOOST_PP_ENUM_TRAILING< / b > macro generates a comma-separated list with a leading comma.
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< h4 > Usage< / h4 >
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< b > BOOST_PP_ENUM_TRAILING< / b > (< i > count< / i > , < i > macro< / i > , < i > data< / i > )
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< h4 > Arguments< / h4 >
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< dt > count< / dt >
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The number of repetitious calls to < i > macro< / i > .
Valid values range from < i > 0< / i > to < b > BOOST_PP_LIMIT_REPEAT< / b > .
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< dt > macro< / dt >
< dd >
A ternary operation of the form < i > macro< / i > (< i > z< / i > , < i > n< / i > , < i > data< / i > ).
This macro is expanded by < b > BOOST_PP_ENUM< / b > with the next available repetition depth,
the current repetition number, and the auxiliary < i > data< / i > argument.
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< dt > data< / dt >
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Auxiliary data passed to < i > macro< / i > .
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< h4 > Remarks< / h4 >
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This macro expands to the comma-separated sequence:
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, < i > macro< / i > (< i > z< / i > , < i > 0< / i > , < i > data< / i > ), < i > macro< / i > (< i > z< / i > , < i > 1< / i > , < i > data< / i > ), ... < i > macro< / i > (< i > z< / i > , < i > count< / i > - < i > 1< / i > , < i > data< / i > )
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The < i > z< / i > value that is passed to < i > macro< / i > represents the next available repetition dimension.
Other macros that have < b > _Z< / b > suffix variants internally use < b > BOOST_PP_REPEAT< / b > --for example, < b > BOOST_PP_ENUM_PARAMS< / b > and < b > BOOST_PP_ENUM_PARAMS_Z< / b > .
Using these < b > _Z< / b > versions is not strictly necessary, but passing the < i > z< / i > value (that is passed to < i > macro< / i > ) to these macros allows them to reenter < b > BOOST_PP_REPEAT< / b > with maximum efficiency.
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To directly use this < i > z< / i > value, rather than simply passing it to another macro, see < b > BOOST_PP_ENUM_TRAILING_< i > z< / i > < / b > .
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< h4 > See Also< / h4 >
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< li > < a href = "enum_trailing_z.html" > BOOST_PP_ENUM_TRAILING_< i > z< / i > < / a > < / li >
< li > < a href = "limit_repeat.html" > BOOST_PP_LIMIT_REPEAT< / a > < / li >
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< h4 > Requirements< / h4 >
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< b > Header:< / b > < a href = "../headers/repetition/enum_trailing.html" > < boost/preprocessor/repetition/enum_trailing.hpp> < / a >
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< h4 > Sample Code< / h4 >
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#include < < a href = "../headers/repetition/enum_trailing.html" > boost/preprocessor/repetition/enum_trailing.hpp< / a > >
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#define TEXT(z, n, text) text
template< class < a href = "enum_trailing.html" > BOOST_PP_ENUM_TRAILING< / a > (3, TEXT, class)>
class X { };
/*
expands to...
template< class, class, class, class>
class X { };
*/
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< i > <EFBFBD> Copyright < a href = "http://www.housemarque.com" target = "_top" > Housemarque Oy< / a > 2002< / i >
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< p > < small > Distributed under the Boost Software License, Version 1.0. (See
accompanying file < a href = "../../../LICENSE_1_0.txt" > LICENSE_1_0.txt< / a > or
copy at < a href =
"http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt< / a > )< / small > < / p >
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