Struct template null_eval

Boost C++ Libraries

Struct template null_eval

boost::proto::context::null_eval

Synopsis

// In header: <boost/proto/context/null.hpp>

template<typename Expr, typename Context> 
struct null_eval {
  // types
  typedef void result_type;

  // public member functions
  void operator()(Expr &, Context &) const;
};

Description

`null_eval` public member functions

void operator()(Expr & expr, Context & context) const;

For N in [0,Expr arity), evaluate:

proto::eval(proto::child_c<N>(expr), context)