template<class T, class H = RWTHash<T>, class EQ = std::equal_to<T>, class A = std::allocator<T>>
class RWTValHashSetIterator< T, H, EQ, A >
- Deprecated
- As of SourcePro 12.5, use RWTValHashSet::iterator to iterate over the elements in this collection.
RWTValHashSetIterator provides an iterator interface to the C++ Standard Library collection represented by RWTValHashSet. (An STL iterator interface is provided through RWTValHashSet::iterator.)
Iteration over an RWTValHashSet is pseudorandom and dependent on the capacity of the underlying hash table and the hash function being used.
The current item referenced by this iterator is undefined after construction or after a call to reset(). The iterator becomes valid after being advanced with either a pre-increment or an operator()().
For both operator++() and operator()(), iterating past the last element returns a value equivalent to boolean false
. Continued increments return a value equivalent to false
until reset() is called.
The value type must have operator==()
defined. This requirement is imposed by the C++ Standard Library.
- Synopsis
#include <rw/tvhset.h>
Deprecated. Provides an iterator for RWTValHashSet.
Definition tvhset.h:935
Maintains a collection of values stored according to a hash object.
Definition tvhset.h:143
- Persistence
- None
- Example
#include <rw/cstring.h>
#include <rw/tvhset.h>
#include <functional>
#include <iostream>
int main() {
std::equal_to<RWCString> >
std::equal_to<RWCString> >
itr(age);
age.insert("John");
age.insert("Steve");
age.insert("Mark");
while (itr()) {
std::cout << itr.key() << std::endl;
}
return 0;
}
static unsigned hash(const RWCString &str)
Definition stdcstring.h:4413
Program Output:
template<class T , class H = RWTHash<T>, class EQ = std::equal_to<T>, class A = std::allocator<T>>
Advances self to the next element. If the iterator has been reset or just created, self will reference the first element. If, before iteration, self referenced the last value in the multiset, self will reference an undefined value and will return false
. Otherwise, it returns true
.