Struct default_generator

boost::proto::default_generator — A simple generator that passes an expression through unchanged.

Synopsis

struct default_generator :  proto::callable {
  template<typename This, typename Expr> 
  struct result<This(Expr)> {
    // types
    typedef Expr type;
  };

  // public member functions
  template<typename Expr> Expr const & operator()(Expr const &) const;
};

Description

Generators are intended for use as the first template parameter to the proto::domain<> class template and control if and how expressions within that domain are to be customized. The proto::default_generator makes no modifications to the expressions passed to it.

`default_generator` public member functions

template<typename Expr> Expr const & operator()(Expr const & expr) const;

Parameters:

expr

A Proto expression

Returns: