BuildTupleAccessor< _X_, TYPES, TUP, i > Class Template Reference

#include "lib/meta/tuple-helper.hpp"

Description

template<template< class, class, class, uint > class _X_, typename TYPES, class TUP = Tuple<TYPES>, uint i = 0>
class lib::meta::BuildTupleAccessor< _X_, TYPES, TUP, i >

Decorating a tuple type with auxiliary data access operations.

This helper template builds up a subclass of the given TUP (base) type (which is assumed to be a Tuple or at least need to be copy constructible from Tuple<TYPES> ). The purpose is to use the Tuple as storage record, but to add a layer of access functions, which in turn might rely on the exact type of the individual elements within the Tuple. To achieve this, for each type within the Tuple, the TUP type is decorated with an instance of the template passed in as template template parameter X. Each of these decorating instances is provided with an index number, allowing to access "his" specific element within the underlying tuple.

The decorating template X need to take its own base class as template parameter. Typically, operations on X will be defined in a recursive fashion, calling down into this templated base class. To support this, an instantiation of X with the empty type sequence is generated for detecting recursion end (built as innermost decorator, i.e. the immediate subclass of TUP)

Definition at line 322 of file tuple-helper.hpp.

Public Types
using	Product = _X_< Head, NextAccessor, TUP, i >
	type of the product created by this template. More...

Private Types
using	Head = typename Split< TYPES >::Head
using	NextAccessor = typename NextBuilder::Product
using	NextBuilder = BuildTupleAccessor< _X_, Tail, TUP, i+1 >
using	Tail = typename Split< TYPES >::Tail

Member Typedef Documentation

Product

using Product = _X_< Head , NextAccessor , TUP , i >

type of the product created by this template.

Will be a subclass of TUP

Definition at line 337 of file tuple-helper.hpp.

Collaboration diagram for BuildTupleAccessor< _X_, TYPES, TUP, i >:

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The documentation for this class was generated from the following file:

• tuple-helper.hpp