nngn::static_vector< T > Class Template Reference

Fixed-size vector with an embedded free list. More...

#include <static_vector.h>

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Classes
union	entry

Public Member Functions
	~static_vector (void)=default
	static_vector (void)=default
	Constructs an empty vector.
	static_vector (std::size_t n)
	Constructs an empty vector with capacity n.
std::size_t	size (void) const
	Calculates the true size (excluding the entries in the free list).
std::size_t	n_free (void) const
	Calculates the number of entries in the free list.
bool	full (void) const
	Checks if the vector is full (i.e.
void	set_capacity (std::size_t c)
	Changes the total number of items of the vector can hold.
T &	insert (T t)
	Inserts an element in the first free position.
template<typename ... Ts>
T &	emplace (Ts &&...ts)
	Emplace an element in the first free position.
void	erase (T *p)
	Removes element p from the vector.
void	erase (iterator it)
	Removes the element at *it from the vector.

Private Types
using	vector_type = std::vector<T>

Private Attributes
entry *	free_head = {}
	Pointer to the first entry in the free list.

Detailed Description

template<typename T>
class nngn::static_vector< T >

Fixed-size vector with an embedded free list.

Provides constant time insertion and removal. The free list is kept in the first sizeof(std::uintptr_t) bytes of T. Adding elements when the vector is full results in undefined behavior, but the size can be changed using set_capacity.

Member Typedef Documentation

vector_type

template<typename T >

using nngn::static_vector< T >::vector_type = std::vector<T>

private

Constructor & Destructor Documentation

~static_vector()

template<typename T >

nngn::static_vector< T >::~static_vector ( void )

default

static_vector() [1/2]

template<typename T >

nngn::static_vector< T >::static_vector ( void )

default

Constructs an empty vector.

set_capacity must be called before items are added.

static_vector() [2/2]

template<typename T >

nngn::static_vector< T >::static_vector ( std::size_t n )

inlineexplicit

Constructs an empty vector with capacity n.

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Member Function Documentation

emplace()

template<typename T >

template<typename ... Ts>

T & nngn::static_vector< T >::emplace

(

Ts &&...

ts

)

Emplace an element in the first free position.

Complexity: O(1).

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erase() [1/2]

template<typename T >

void nngn::static_vector< T >::erase

(

iterator

it

)

Removes the element at *it from the vector.

Complexity: O(1).

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erase() [2/2]

template<typename T >

void nngn::static_vector< T >::erase

(

T *

p

)

Removes element p from the vector.

Complexity: O(1).

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full()

template<typename T >

bool nngn::static_vector< T >::full

(

void

)

const

Checks if the vector is full (i.e.

no more items can be added).

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insert()

template<typename T >

T & nngn::static_vector< T >::insert ( T t )

inline

Inserts an element in the first free position.

Complexity: O(1).

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n_free()

template<typename T >

std::size_t nngn::static_vector< T >::n_free

(

void

)

const

Calculates the number of entries in the free list.

set_capacity()

template<typename T >

void nngn::static_vector< T >::set_capacity

(

std::size_t

c

)

Changes the total number of items of the vector can hold.

Previous data are lost.

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size()

template<typename T >

std::size_t nngn::static_vector< T >::size

(

void

)

const

Calculates the true size (excluding the entries in the free list).

Complexity: O(n_free()).

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Member Data Documentation

free_head

template<typename T >

entry* nngn::static_vector< T >::free_head = {}

private

Pointer to the first entry in the free list.

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

• src/utils/static_vector.h