AhHashDispatcher< Key, Operation > Class Template Reference

Hash-based command dispatcher. More...

#include <ah-dispatcher.H>

Collaboration diagram for AhHashDispatcher< Key, Operation >:

Classes
struct	Equal

Public Member Functions
	AhHashDispatcher ()
	Default constructor.
void	insert (const Key &key, Operation op)
	Register a key-operation pair.
template<typename ... Args>
auto	run (const Key &key, Args ... args) const
	Execute the operation associated with a key.
void	remove (const Key &key)
	Remove a key-operation pair.
bool	has (const Key &key) const
	Check if a key is registered.

Private Types
using	P = std::pair< Key, Operation >

Static Private Member Functions
static size_t	fst_hash (const P &p)
static size_t	snd_hash (const P &p)

Private Attributes
ODhashTable< P, Equal >	tbl

Detailed Description

template<typename Key, class Operation>
class AhHashDispatcher< Key, Operation >

Hash-based command dispatcher.

Maps keys to operations using a hash table (ODhashTable). Provides O(1) average lookup, insertion, and removal.

Template Parameters

Key	The key type (must be hashable)
Operation	The callable type

Use this when:

• You have many operations and need fast lookup
• Keys are easily hashable (strings, integers)

Use AHDispatcher instead when:

• You need ordered iteration over keys

• Key comparison is simpler than hashing

  Author

  Leandro Rabindranath León

Definition at line 270 of file ah-dispatcher.H.

Member Typedef Documentation

P

template<typename Key , class Operation >

using AhHashDispatcher< Key, Operation >::P = std::pair<Key, Operation>

private

Definition at line 272 of file ah-dispatcher.H.

Constructor & Destructor Documentation

AhHashDispatcher()

template<typename Key , class Operation >

AhHashDispatcher< Key, Operation >::AhHashDispatcher ( )

inline

Default constructor.

Definition at line 290 of file ah-dispatcher.H.

Member Function Documentation

fst_hash()

template<typename Key , class Operation >

static size_t AhHashDispatcher< Key, Operation >::fst_hash ( const P &  p )

inlinestaticprivate

Definition at line 282 of file ah-dispatcher.H.

References Aleph::dft_hash_fct().

has()

template<typename Key , class Operation >

bool AhHashDispatcher< Key, Operation >::has ( const Key &  key ) const

inline

Check if a key is registered.

Parameters

key	The key to check.

Returns

true if the key exists.

Definition at line 338 of file ah-dispatcher.H.

References AhHashDispatcher< Key, Operation >::tbl.

insert()

template<typename Key , class Operation >

void AhHashDispatcher< Key, Operation >::insert ( const Key &  key, Operation  op  )

inline

Register a key-operation pair.

Parameters

key	The key to register.
op	The operation to associate with the key.

Definition at line 299 of file ah-dispatcher.H.

References Aleph::maps(), and AhHashDispatcher< Key, Operation >::tbl.

remove()

template<typename Key , class Operation >

void AhHashDispatcher< Key, Operation >::remove ( const Key &  key )

inline

Remove a key-operation pair.

Parameters

key	The key to remove.

Definition at line 326 of file ah-dispatcher.H.

References AhHashDispatcher< Key, Operation >::tbl.

run()

template<typename Key , class Operation >

template<typename ... Args>

auto AhHashDispatcher< Key, Operation >::run ( const Key &  key, Args ...  args  ) const

inline

Execute the operation associated with a key.

Template Parameters

Args	Types of arguments to pass to the operation.

Parameters

key	The key identifying the operation.
args	Arguments to forward to the operation.

Returns

The return value of the operation.

Exceptions

std::domain_error

if the key is not found.

Definition at line 315 of file ah-dispatcher.H.

References Aleph::maps(), and AhHashDispatcher< Key, Operation >::tbl.

snd_hash()

template<typename Key , class Operation >

static size_t AhHashDispatcher< Key, Operation >::snd_hash ( const P &  p )

inlinestaticprivate

Definition at line 283 of file ah-dispatcher.H.

References Aleph::snd_hash_fct().

Member Data Documentation

tbl

template<typename Key , class Operation >

ODhashTable<P, Equal> AhHashDispatcher< Key, Operation >::tbl

private

Definition at line 285 of file ah-dispatcher.H.

Referenced by AhHashDispatcher< Key, Operation >::has(), AhHashDispatcher< Key, Operation >::insert(), AhHashDispatcher< Key, Operation >::remove(), and AhHashDispatcher< Key, Operation >::run().

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

• ah-dispatcher.H