Boost C++ Libraries

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This is the documentation for a snapshot of the master branch, built from commit 20a7dc9240.
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Struct template when

boost::proto::external_transforms::when

Synopsis

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


template<typename Grammar> 
struct when :
   proto::otherwise< typename mpl::at< map_type, Grammar >::type >
{
};

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