Boost C++ Libraries

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Struct template generator

boost::proto::generator — A generator that wraps expressions passed to it in the specified extension wrapper.

Synopsis

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

template<template< typename > class Extends> 
struct generator {
  // member classes/structs/unions
  template<typename This, typename Expr> 
  struct result<This(Expr)> {
    // types
    typedef Extends< Expr > type;
  };

  // public member functions
  template<typename Expr> Extends< Expr > 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. proto::generator<> wraps each expression passed to it in the Extends<> wrapper.

generator public member functions

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

    Parameters:

    expr

    A Proto expression

    Returns:

    Extends<Expr>(expr)


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