Boost C++ Libraries

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This is an older version of Boost and was released in 2015. The current version is 1.89.0.

Struct template impl

Struct template impl

boost::proto::or_::impl

Synopsis

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


template<typename Expr, typename State, typename Data> 
struct impl :  proto::transform_impl< Expr, State, Data > {
  // types
  typedef unspecified result_type;

  // public member functions
  result_type operator()(typename impl::expr_param, 
                         typename impl::state_param, 
                         typename impl::data_param) const;
};

Description

`impl` public member functions

result_type operator()(typename impl::expr_param expr, 
                       typename impl::state_param state, 
                       typename impl::data_param data) const;

Parameters:

`data`	A data of arbitrary type
`expr`	An expression
`state`	The current state

Returns:

G_x()(expr, state, data), where x is the lowest number such that proto::matches<Expr, G_x>::value is true.