Defines the syntax elements of xpressive's action expressions.

BOOST_PROTO_LOCAL_MACRO(N, typename_A, A_const_ref, A_const_ref_a, a)
BOOST_PROTO_LOCAL_a
BOOST_PROTO_LOCAL_LIMITS

namespace boost {
  namespace xpressive {
    template<typename Fun> struct function;
    template<typename T> struct value;
    template<typename T> struct reference;
    template<typename T> struct local;
    template<typename T, int I, typename Dummy> struct placeholder;

    function< op::push >::type const push;
    function< op::push_back >::type const push_back;
    function< op::push_front >::type const push_front;
    function< op::pop >::type const pop;
    function< op::pop_back >::type const pop_back;
    function< op::pop_front >::type const pop_front;
    function< op::top >::type const top;
    function< op::back >::type const back;
    function< op::front >::type const front;
    function< op::first >::type const first;
    function< op::second >::type const second;
    function< op::matched >::type const matched;
    function< op::length >::type const length;
    function< op::str >::type const str;
    function< op::insert >::type const insert;
    function< op::make_pair >::type const make_pair;
    unspecified check;
    unspecified let;
    template<typename X2_0, typename A0> unspecified as(A0 const &);
    template<typename X2_0, typename A0> unspecified static_cast_(A0 const &);
    template<typename X2_0, typename A0> unspecified dynamic_cast_(A0 const &);
    template<typename X2_0, typename A0> unspecified const_cast_(A0 const &);
    template<typename T> value< T > const val(T const &);
    template<typename T> reference< T > const ref(T &);
    template<typename T> reference< T const  > const cref(T const &);
    namespace op {
      struct push;
      struct push_back;
      struct push_front;
      struct pop;
      struct pop_back;
      struct pop_front;
      struct front;
      struct back;
      struct top;
      struct first;
      struct second;
      struct matched;
      struct length;
      struct str;
      struct insert;
      struct make_pair;
      template<typename T> struct as;
      template<typename T> struct static_cast_;
      template<typename T> struct dynamic_cast_;
      template<typename T> struct const_cast_;
      template<typename T> struct construct;
      template<typename Except> struct throw_;
    }
  }
}