Boost C++ Libraries

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This is an older version of Boost and was released in 2024. The current version is 1.89.0.

Struct template listN

Struct template listN

boost::proto::listN — proto::list1<>, proto::list2<>, etc., are type sequences for use as the 2^nd parameter to the proto::expr<> or proto::basic_expr<> class templates.

Synopsis

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

template<typename... Arg> 
struct listN {
  // types
  typedef ArgM childM;  // For each M in [0,N)

  // public data members
  static const long arity;  // = N;
};

Description

Type sequences, for use as the 2^nd parameter to the proto::expr<> or proto::basic_expr<> class template. The types in the sequence correspond to the children of a node in an expression tree. There is no type literally named "listN"; rather, there is a set of types named proto::list1<>, proto::list2<>, etc.