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76 lines
1.9 KiB
76 lines
1.9 KiB
/****************************************************************************/
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/** Microsoft OS/2 LAN Manager **/
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/** Copyright(c) Microsoft Corp., 1990 **/
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/****************************************************************************/
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/****************************************************************************\
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iter.hxx
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LM 3.0 abstract iterator class
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This file contains the definition for the abstract iterator class that
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other iterators should inherit from and emulate.
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FILE HISTORY:
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johnl 27-Jun-1990 Created
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\****************************************************************************/
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/****************************************************************************\
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*
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*NAME: ITER
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*
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*WORKBOOK: ITER
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*
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*SYNOPSIS: Abstract iterator class
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*
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*INTERFACE: ITER_OF(type) - Defines an abstract iterator of type (generally
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* used by child classes).
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*
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* DECLARE_ITER_OF(type) - Produces declaration for an iterator
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* of type "type".
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*
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* virtual void Reset( ) - Puts iterator in the "initial"
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* state (i.e., as if it had just
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* been declared).
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*
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* virtual type* Next( ) - Returns "next" item in collection,
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* returns NULL if the coll. is empty
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* or we have iterated past last item.
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*
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* virtual type* operator()() - Synonym for Next()
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*
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*PARENT:
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*
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*USES: NONE
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*
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*CAVEATS: NONE
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*
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*
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*
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*HISTORY:
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* Johnl 27-Jun-1990
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*
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*
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\****************************************************************************/
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#ifndef _ITER_HXX_
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#define _ITER_HXX_
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#define ITER_OF(type) iter_of_##type
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#define DECL_ITER_OF(type,dec) \
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class dec ITER_OF(type) \
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{ \
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public: \
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virtual void Reset( void ) = 0 ; \
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virtual type* Next( void ) = 0 ; \
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\
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}; \
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#define DECLARE_ITER_OF(type) \
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DECL_ITER_OF(type,DLL_TEMPLATE)
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#endif //_ITER_HXX_
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