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 b9ab49fc70.
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Struct template arity_of

boost::proto::arity_of — A metafunction that returns the arity of a Proto expression.

Synopsis

// In header: <boost/proto/traits.hpp>

template<typename Expr> 
struct arity_of :  Expr::proto_arity {
};

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