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 20a7dc9240.
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Struct template impl

boost::proto::_data::impl

Synopsis

// In header: <boost/proto/transform/arg.hpp>


template<typename Expr, typename State, typename Data> 
struct impl :  
    mpl::if_c<
      proto::is_env<Data>::value,
      proto::_env_var<proto::data_type>,
      proto::_env
    >::type::template impl<Expr, State, Data>
{
};

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