lass::util::IdGenerator< T > Class Template Reference

Generates sequential and unique ID's. More...

#include <id_generator.h>

Public Member Functions
	IdGenerator (typename CallTraits< T >::TParam iFirstId=0)
	Construct an ID generator of which iFirstId is the first ID to be generated.
CallTraits< T >::TValue	operator() ()
	Generate an ID.
void	setNext (typename CallTraits< T >::TParam iNextId)
	set the next ID to be drawn.
Private Attributes
CallTraits< T >::TValue	nextId_

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Detailed Description

template<typename T>
class lass::util::IdGenerator< T >

Generates sequential and unique ID's.

Author:

Bram de Greve

Date:

2003

Pretty simple. This object generates unique ID numbers, each incremented by one, starting from a given ID.

  IdGenerator<unsigned> generator;
  LASS_COUT << generator() << "\n"; // will print '0'
  LASS_COUT << generator() << "\n"; // will print '1'
  LASS_COUT << generator() << "\n"; // will print '2'
  LASS_COUT << generator() << "\n"; // will print '3'
  ...

requirements for T:

• T must implement prefix increment, operator++
• T must be less-than comparable, operator<
• T must be copy-constructible

Definition at line 87 of file id_generator.h.

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Constructor & Destructor Documentation

template<typename T >

lass::util::IdGenerator< T >::IdGenerator

(

typename CallTraits< T >::TParam

iFirstId = 0

)

[inline]

Construct an ID generator of which iFirstId is the first ID to be generated.

Definition at line 62 of file id_generator.inl.

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Member Function Documentation

template<typename T >

CallTraits< T >::TValue lass::util::IdGenerator< T >::operator()

(

)

[inline]

Generate an ID.

Each call to this operator will give you a new ID incremented by one.

Exceptions:

an

exception is thrown if the generator can no longer increment the id field. Since the generator stores the id that will be returned on the next call, this means the maximum id returned will be num::NumTraits<T>::max-1

Definition at line 76 of file id_generator.inl.

References LASS_THROW, and lass::util::IdGenerator< T >::nextId_.

template<typename T >

void lass::util::IdGenerator< T >::setNext

(

typename CallTraits< T >::TParam

iNextId

)

[inline]

set the next ID to be drawn.

Definition at line 92 of file id_generator.inl.

References lass::util::IdGenerator< T >::nextId_.

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Field Documentation

template<typename T >

CallTraits<T>::TValue lass::util::IdGenerator< T >::nextId_ [private]

Definition at line 99 of file id_generator.h.

Referenced by lass::util::IdGenerator< T >::operator()(), and lass::util::IdGenerator< T >::setNext().

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

• id_generator.h
• id_generator.inl