PartiallyInitTuple< SRC, TAR, start > Struct Template Reference

#include "lib/meta/function-closure.hpp"

Description

template<typename SRC, typename TAR, size_t start>
struct lib::meta::func::anonymous_namespace{function-closure.hpp}::PartiallyInitTuple< SRC, TAR, start >

Builder for a tuple instance, where only some ctor parameters are supplied, while the remaining arguments will be default constructed.

The use case is to create a function binder, where some arguments shall be passed through (and thus be stored in the resulting closure), while other arguments are just marked as "Placeholder" with std::_Placeholder<i>. These placeholder marker terms just need to be default constructed, and will then be stored into the desired positions. Later on, when actually invoking such a partially closed function, only the arguments marked with placeholders need to be supplied, while the other arguments will use the values hereby "baked" into the closure.

Template Parameters

TAR	full target tuple type. Some oft the elements within this tuple will be default constructed, some will be initialised from the SRC tuple
SRC	argument tuple type, for the values actually to be initialised here.
start	position within SRC, at which the sequence of init-arguments starts; all other positions will just be default initialised

See also

lib::meta::TupleConstructor

Definition at line 136 of file function-closure.hpp.

Classes
struct	IndexMapper
struct	IndexMapper< idx, false >

Public Types
template<size_t i>
using	DestType = std::tuple_element_t< i, TAR >

Static Public Member Functions
static constexpr bool	useArg (size_t idx)
	define those index positions in the target tuple, where init arguments shall be used on construction.

Member Typedef Documentation

DestType

template<typename SRC , typename TAR , size_t start>

template<size_t i>

using DestType = std::tuple_element_t<i, TAR>

Definition at line 139 of file function-closure.hpp.

Member Function Documentation

useArg()

template<typename SRC , typename TAR , size_t start>

static constexpr bool useArg ( size_t  idx )

inlinestaticconstexpr

define those index positions in the target tuple, where init arguments shall be used on construction.

All other arguments will just be default initialised.

Definition at line 148 of file function-closure.hpp.

Collaboration diagram for PartiallyInitTuple< SRC, TAR, start >:

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

• function-closure.hpp