Struct value

boost::proto::functional::value — A callable PolymorphicFunctionObject that is equivalent to the proto::value() function.

Synopsis

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


struct value :  proto::callable {
  // member classes/structs/unions
  template<typename This, typename Expr> 
  struct result<This(Expr)> :  proto::result_of::value< Expr > {
  };

  // public member functions
  template<typename Expr> 
    typename proto::result_of::value< Expr & >::type operator()(Expr &) const;
  template<typename Expr> 
    typename proto::result_of::value< Expr const & >::type 
    operator()(Expr const &) const;
};

Description

`value` public member functions

template<typename Expr> 
  typename proto::result_of::value< Expr & >::type 
  operator()(Expr & expr) const;

Return the value of the given terminal expression.

Parameters:

expr

The terminal expression node.

Requires:

proto::is_expr<Expr>::value is true

0 == Expr::proto_arity::value

Returns:

proto::value(expr)

Throws:

Will not throw.

template<typename Expr> 
  typename proto::result_of::value< Expr const & >::type 
  operator()(Expr const & expr) const;

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Struct value

Synopsis

Description

value public member functions

`value` public member functions