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added const reverse iterators

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git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@25 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2006-10-19 12:30:20 +00:00
parent dc0ece358b
commit 90297eb200
1 changed files with 50 additions and 43 deletions
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src/util/for_each.hpp
+18 -11
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@@ -27,6 +27,7 @@
#define TYPEOF_IT(Value) __typeof(Value.begin())
#define TYPEOF_CIT(Value) __typeof(Value.begin())
#define TYPEOF_RIT(Value) __typeof(Value.rbegin())
#define TYPEOF_CRIT(Value) __typeof(Value.rbegin())
#define TYPEOF_REF(Value) __typeof(*Value.begin())&
#else
@@ -41,6 +42,8 @@
#define TYPEOF_CIT(Value) TypeOf<typeid(Value)>::const_iterator
/// The type of a reverse iterator
#define TYPEOF_RIT(Value) TypeOf<typeid(Value)>::reverse_iterator
/// The type of a const reverse iterator
#define TYPEOF_CRIT(Value) TypeOf<typeid(Value)>::const_reverse_iterator
/// The type of a reference
#define TYPEOF_REF(Value) TypeOf<typeid(Value)>::reference
/// The type of a const reference
@@ -53,6 +56,7 @@
typedef T::iterator iterator; \
typedef T::const_iterator const_iterator; \
typedef T::reverse_iterator reverse_iterator; \
typedef T::const_reverse_iterator const_reverse_iterator; \
typedef T::reference reference; \
typedef T::const_reference const_reference; \
}
@@ -71,7 +75,8 @@
typedef T type; \
typedef T::const_iterator iterator; \
typedef T::const_iterator const_iterator; \
typedef T::reverse_iterator reverse_iterator; \
typedef T::const_reverse_iterator reverse_iterator; \
typedef T::const_reverse_iterator const_reverse_iterator; \
typedef T::const_reference reference; \
typedef T::const_reference const_reference; \
}
@@ -119,13 +124,13 @@
// ----------------------------------------------------------------------------- : Looping macros
/// Iterate over a collection, with an iterator of type TypeIt, and elements of type TypeElem
/** Usage: FOR_EACH_T(TypeIt,TypeElem,e,collect) { body-of-loop }
/** Usage: FOR_EACH_T(TypeIt,TypeElem,e,collect,begin,end) { body-of-loop }
*
* We need a hack to be able to declare a local variable without needing braces.
* To do this we use a nested for loop that is only executed once, and which is optimized away.
* To terminate this loop we need an extra bool, which we set to false after the first iteration.
*/
#define FOR_EACH_T(TypeIt,TypeElem,Elem,Collection) \
#define FOR_EACH_T(TypeIt,TypeElem,Elem,Collection, begin, end) \
for(std::pair<TypeIt,bool> Elem##_IT(Collection.begin(), true) ; \
Elem##_IT.first != Collection.end() ; \
++Elem##_IT.first, Elem##_IT.second = true) \
@@ -137,26 +142,28 @@
/** Usage: FOR_EACH(e,collect) { body-of-loop }
*/
#define FOR_EACH(Elem,Collection) \
FOR_EACH_T(TYPEOF_IT(Collection), TYPEOF_REF(Collection), Elem, Collection)
FOR_EACH_T(TYPEOF_IT(Collection), TYPEOF_REF(Collection), Elem, Collection, begin, end)
/// Iterate over a collection whos type must be declared with DECLARE_TYPEOF
/** Uses a const iterator
* Usage: FOR_EACH_CONST(e,collect) { body-of-loop }
*/
#define FOR_EACH_CONST(Elem,Collection) \
FOR_EACH_T(TYPEOF_CIT(Collection), TYPEOF_CREF(Collection), Elem, Collection)
FOR_EACH_T(TYPEOF_CIT(Collection), TYPEOF_CREF(Collection), Elem, Collection, begin, end)
/// Iterate over a collection whos type must be declared with DECLARE_TYPEOF
/** Iterates using a reverse_iterator
* Usage: FOR_EACH_REVERSE(e,collect) { body-of-loop }
*/
#define FOR_EACH_REVERSE(Elem,Collection) \
for(std::pair<TYPEOF_RIT(Collection),bool> Elem##_IT(Collection.rbegin(), true) ; \
Elem##_IT.first != Collection.rend() ; \
++Elem##_IT.first, Elem##_IT.second = true) \
for(TYPEOF_REF(Collection) Elem = *Elem##_IT.first ; \
Elem##_IT.second ; \
Elem##_IT.second = false)
FOR_EACH_T(TYPEOF_RIT(Collection), TYPEOF_REF(Collection), Elem, Collection, rbegin, rend)
/// Iterate over a collection whos type must be declared with DECLARE_TYPEOF
/** Iterates using a const_reverse_iterator
* Usage: FOR_EACH_CONST_REVERSE(e,collect) { body-of-loop }
*/
#define FOR_EACH_CONST_REVERSE(Elem,Collection) \
FOR_EACH_T(TYPEOF_CRIT(Collection), TYPEOF_CREF(Collection), Elem, Collection, rbegin, rend)
/// Iterate over two collection in parallel
/** Usage: FOR_EACH_2_T(TypeIt1,TypeElem1,e1,collect1,TypeIt2,TypeElem2,e2,collect2) { body-of-loop }