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BOOST_VARIANT_ENUM_PARAMS — Enumerate parameters for use with
variant.
// In header: <boost/variant/variant_fwd.hpp>
BOOST_VARIANT_ENUM_PARAMS(param)Expands to a comma-separated sequence of length
BOOST_VARIANT_LIMIT_TYPES, where
each element in the sequence consists of the concatenation of
param with its zero-based index into the
sequence. That is,
param ## 0, param ## 1, ..., param ## BOOST_VARIANT_LIMIT_TYPES - 1.
Rationale: This macro greatly
simplifies for the user the process of declaring
variant types
in function templates or explicit partial specializations of class
templates, as shown in the
tutorial.