OperationForEach.h

/*********************************************************************** Author: Zihan Chen (vczh) Licensed under https://github.com/vczh-libraries/License ***********************************************************************/

#ifndef VCZH_COLLECTIONS_FOREACH

#define VCZH_COLLECTIONS_FOREACH

#include "../Basic.h"

#include "../Pointer.h"

#include "Interfaces.h"

namespace

{

namespace

collections

{

/*********************************************************************** ForEachIterator ***********************************************************************/

template

typename

class

ForEachIterator

public

Object

{

public

virtual

bool

(

variable

)

const

;

operator

bool

()

const

{

return

true

; } };

/*********************************************************************** ForEachIterator for IEnumerable ***********************************************************************/

template

typename

class

EnumerableForEachIterator

public

ForEachIterator

> {

protected

Ptr

IEnumerator

enumerator

;

public

EnumerableForEachIterator

(

const

IEnumerable

enumerable

) :enumerator(

enumerable

CreateEnumerator

()) { }

EnumerableForEachIterator

(

const

EnumerableForEachIterator

enumerableIterator

) :enumerator(

enumerableIterator

enumerator

) { }

bool

(

variable

)

const

{

(

enumerator

()) {

variable

enumerator

Current

();

return

true

; }

else

{

return

false

; } } };

template

typename

EnumerableForEachIterator

CreateForEachIterator

(

const

IEnumerable

enumerable

) {

return

enumerable

; }

/*********************************************************************** FOREACH and FOREACH_INDEXER ***********************************************************************/

#define FOREACH(TYPE, VARIABLE, COLLECTION)\

SCOPE_VARIABLE(const ::vl::collections::ForEachIterator<TYPE>&, __foreach_iterator__, ::vl::collections::CreateForEachIterator(COLLECTION))\

for(TYPE VARIABLE;__foreach_iterator__.Next(VARIABLE);)

#define FOREACH_INDEXER(TYPE, VARIABLE, INDEXER, COLLECTION)\

SCOPE_VARIABLE(const ::vl::collections::ForEachIterator<TYPE>&, __foreach_iterator__, ::vl::collections::CreateForEachIterator(COLLECTION))\

SCOPE_VARIABLE(vint, INDEXER, 0)\

for(TYPE VARIABLE;__foreach_iterator__.Next(VARIABLE);INDEXER++)

} }

#endif