![]() |
Home | Libraries | People | FAQ | More |
boost::proto::functional::pop_front — A PolymorphicFunctionObject type that invokes the
fusion::pop_front()
algorithm on its argument.
// In header: <boost/proto/fusion.hpp> struct pop_front : proto::callable { // member classes/structs/unions template<typename This, typename Expr> struct result<This(Expr)> : result< This(Expr const &) > { }; template<typename This, typename Expr> struct result<This(Expr &)> : fusion::result_of::pop_front< Expr > { }; // public member functions template<typename Expr> typename fusion::result_of::pop_front< Expr >::type operator()(Expr &) const; template<typename Expr> typename fusion::result_of::pop_front< Expr const >::type operator()(Expr const &) const; };
A PolymorphicFunctionObject type that invokes the
fusion::pop_front()
algorithm on its argument. This is
useful for defining a CallableTransform such as
pop_front(_)
, which removes the first child from a Proto
expression node. Such a transform might be used as the first argument to the
proto::fold<>
transform; that is, fold all but the first child.