hash_multimap (STL/CLR)

The template class describes an object that controls a varying-length sequence of elements that has bidirectional access. You use the container hash_multimap to manage a sequence of elements as a hash table, each table entry storing a bidirectional linked list of nodes, and each node storing one element. An element consists of a key, for ordering the sequence, and a mapped value, which goes along for the ride.

In the description below, GValue is the same as:

Microsoft::VisualC::StlClr::GenericPair<GKey, GMapped>

where:

GKey is the same as Key unless the latter is a ref type, in which case it is Key^

GMapped is the same as Mapped unless the latter is a ref type, in which case it is Mapped^

Syntax

template<typename Key,  
    typename Mapped>  
    ref class hash_multimap  
        :   public  
        System::ICloneable,  
        System::Collections::IEnumerable,  
        System::Collections::ICollection,  
        System::Collections::Generic::IEnumerable<GValue>,  
        System::Collections::Generic::ICollection<GValue>,  
        System::Collections::Generic::IList<GValue>,  
        Microsoft::VisualC::StlClr::IHash<Gkey, GValue>  
    { ..... };  

Parameters

Key
The type of the key component of an element in the controlled sequence.

Mapped
The type of the additional component of an element in the controlled sequence.

Requirements

Header: <cliext/hash_map>

Namespace: cliext

Declarations

Type Definition Description
hash_multimap::const_iterator (STL/CLR) The type of a constant iterator for the controlled sequence.
hash_multimap::const_reference (STL/CLR) The type of a constant reference to an element.
hash_multimap::const_reverse_iterator (STL/CLR) The type of a constant reverse iterator for the controlled sequence.
hash_multimap::difference_type (STL/CLR) The type of a (possibly signed) distance between two elements.
hash_multimap::generic_container (STL/CLR) The type of the generic interface for the container.
hash_multimap::generic_iterator (STL/CLR) The type of an iterator for the generic interface for the container.
hash_multimap::generic_reverse_iterator (STL/CLR) The type of a reverse iterator for the generic interface for the container.
hash_multimap::generic_value (STL/CLR) The type of an element for the generic interface for the container.
hash_multimap::hasher (STL/CLR) The hashing delegate for a key.
hash_multimap::iterator (STL/CLR) The type of an iterator for the controlled sequence.
hash_multimap::key_compare (STL/CLR) The ordering delegate for two keys.
hash_multimap::key_type (STL/CLR) The type of an ordering key.
hash_multimap::mapped_type (STL/CLR) The type of the mapped value associated with each key.
hash_multimap::reference (STL/CLR) The type of a reference to an element.
hash_multimap::reverse_iterator (STL/CLR) The type of a reverse iterator for the controlled sequence.
hash_multimap::size_type (STL/CLR) The type of a (non-negative) distance between two elements.
hash_multimap::value_compare (STL/CLR) The ordering delegate for two element values.
hash_multimap::value_type (STL/CLR) The type of an element.
Member Function Description
hash_multimap::begin (STL/CLR) Designates the beginning of the controlled sequence.
hash_multimap::bucket_count (STL/CLR) Counts the number of buckets.
hash_multimap::clear (STL/CLR) Removes all elements.
hash_multimap::count (STL/CLR) Counts elements matching a specified key.
hash_multimap::empty (STL/CLR) Tests whether no elements are present.
hash_multimap::end (STL/CLR) Designates the end of the controlled sequence.
hash_multimap::equal_range (STL/CLR) Finds range that matches a specified key.
hash_multimap::erase (STL/CLR) Removes elements at specified positions.
hash_multimap::find (STL/CLR) Finds an element that matches a specified key.
hash_multimap::hash_delegate (STL/CLR) Copies the hashing delegate for a key.
hash_multimap::hash_multimap (STL/CLR) Constructs a container object.
hash_multimap::insert (STL/CLR) Adds elements.
hash_multimap::key_comp (STL/CLR) Copies the ordering delegate for two keys.
hash_multimap::load_factor (STL/CLR) Counts the average elements per bucket.
hash_multimap::lower_bound (STL/CLR) Finds beginning of range that matches a specified key.
hash_multimap::make_value (STL/CLR) Constructs a value object.
hash_multimap::max_load_factor (STL/CLR) Gets or sets the maximum elements per bucket.
hash_multimap::rbegin (STL/CLR) Designates the beginning of the reversed controlled sequence.
hash_multimap::rehash (STL/CLR) Rebuilds the hash table.
hash_multimap::rend (STL/CLR) Designates the end of the reversed controlled sequence.
hash_multimap::size (STL/CLR) Counts the number of elements.
hash_multimap::swap (STL/CLR) Swaps the contents of two containers.
hash_multimap::to_array (STL/CLR) Copies the controlled sequence to a new array.
hash_multimap::upper_bound (STL/CLR) Finds end of range that matches a specified key.
hash_multimap::value_comp (STL/CLR) Copies the ordering delegate for two element values.
Operator Description
hash_multimap::operator= (STL/CLR) Replaces the controlled sequence.

Interfaces

Interface Description
ICloneable Duplicate an object.
IEnumerable Sequence through elements.
ICollection Maintain group of elements.
IEnumerable<T> Sequence through typed elements.
ICollection<T> Maintain group of typed elements.
IHash<Key, Value> Maintain generic container.

Remarks

The object allocates and frees storage for the sequence it controls as individual nodes in a bidirectional linked list. To speed access, the object also maintains a varying-length array of pointers into the list (the hash table), effectively managing the whole list as a sequence of sublists, or buckets. It inserts elements into a bucket that it keeps ordered by altering the links between nodes, never by copying the contents of one node to another. That means you can insert and remove elements freely without disturbing remaining elements.

The object orders each bucket it controls by calling a stored delegate object of type hash_set::key_compare (STL/CLR). You can specify the stored delegate object when you construct the hash_set; if you specify no delegate object, the default is the comparison operator<=(key_type, key_type).

You access the stored delegate object by calling the member function hash_set::key_comp (STL/CLR)(). Such a delegate object must define equivalent ordering between keys of type hash_set::key_type (STL/CLR). That means, for any two keys X and Y:

key_comp()(X, Y) returns the same Boolean result on every call.

If key_comp()(X, Y) && key_comp()(Y, X) is true, then X and Y are said to have equivalent ordering.

Any ordering rule that behaves like operator<=(key_type, key_type), operator>=(key_type, key_type) or operator==(key_type, key_type) defines eqivalent ordering.

Note that the container ensures only that elements whose keys have equivalent ordering (and which hash to the same integer value) are adjacent within a bucket. Unlike template class hash_map (STL/CLR), an object of template class hash_multimap does not require that keys for all elements are unique. (Two or more keys can have equivalent ordering.)

The object determines which bucket should contain a given ordering key by calling a stored delegate object of type hash_set::hasher (STL/CLR). You access this stored object by calling the member function hash_set::hash_delegate (STL/CLR)() to obtain an integer value that depends on the key value. You can specify the stored delegate object when you construct the hash_set; if you specify no delegate object, the default is the function System::Object::hash_value(key_type). That means, for any keys X and Y:

hash_delegate()(X) returns the same integer result on every call.

If X and Y have equivalent ordering, then hash_delegate()(X) should return the same integer result as hash_delegate()(Y).

Each element contains a separate key and a mapped value. The sequence is represented in a way that permits lookup, insertion, and removal of an arbitrary element with a number of operations that is independent of the number of elements in the sequence (constant time) -- at least in the best of cases. Moreover, inserting an element invalidates no iterators, and removing an element invalidates only those iterators which point at the removed element.

If hashed values are not uniformly distributed, however, a hash table can degenerate. In the extreme -- for a hash function that always returns the same value -- lookup, insertion, and removal are proportional to the number of elements in the sequence (linear time). The container endeavors to choose a reasonable hash function, mean bucket size, and hash-table size (total number of buckets), but you can override any or all of these choices. See, for example, the functions hash_set::max_load_factor (STL/CLR) and hash_set::rehash (STL/CLR).

A hash_multimap supports bidirectional iterators, which means you can step to adjacent elements given an iterator that designates an element in the controlled sequence. A special head node corresponds to the iterator returned by hash_multimap::end (STL/CLR)(). You can decrement this iterator to reach the last element in the controlled sequence, if present. You can increment a hash_multimap iterator to reach the head node, and it will then compare equal to end(). But you cannot dereference the iterator returned by end().

Note that you cannot refer to a hash_multimap element directly given its numerical position -- that requires a random-access iterator.

A hash_multimap iterator stores a handle to its associated hash_multimap node, which in turn stores a handle to its associated container. You can use iterators only with their associated container objects. A hash_multimap iterator remains valid so long as its associated hash_multimap node is associated with some hash_multimap. Moreover, a valid iterator is dereferencable -- you can use it to access or alter the element value it designates -- so long as it is not equal to end().

Erasing or removing an element calls the destructor for its stored value. Destroying the container erases all elements. Thus, a container whose element type is a ref class ensures that no elements outlive the container. Note, however, that a container of handles does not destroy its elements.

Members

hash_multimap::begin (STL/CLR)

Designates the beginning of the controlled sequence.

Syntax

iterator begin();  

Remarks

The member function returns a bidirectional iterator that designates the first element of the controlled sequence, or just beyond the end of an empty sequence. You use it to obtain an iterator that designates the current beginning of the controlled sequence, but its status can change if the length of the controlled sequence changes.

Example

// cliext_hash_multimap_begin.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect first two items   
    Myhash_multimap::iterator it = c1.begin();   
    System::Console::WriteLine("*begin() = [{0} {1}]",   
        it->first, it->second);   
    ++it;   
    System::Console::WriteLine("*++begin() = [{0} {1}]",   
        it->first, it->second);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
*begin() = [a 1]  
*++begin() = [b 2]  

hash_multimap::bucket_count (STL/CLR)

Counts the number of buckets.

Syntax

int bucket_count();  

Remarks

The member functions returns the current number of buckets. You use it to determine the size of the hash table.

Example

// cliext_hash_multimap_bucket_count.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1 = gcnew Myhash_multimap;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect current parameters   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// change max_load_factor and redisplay   
    c1.max_load_factor(0.25f);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// rehash and redisplay   
    c1.rehash(100);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 4  

bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 0.25  

bucket_count() = 128  
load_factor() = 0.0234375  
max_load_factor() = 0.25  

hash_multimap::clear (STL/CLR)

Removes all elements.

Syntax

void clear();  

Remarks

The member function effectively calls hash_multimap::erase (STL/CLR)( hash_multimap::begin (STL/CLR)(), hash_multimap::end (STL/CLR)()). You use it to ensure that the controlled sequence is empty.

Example

// cliext_hash_multimap_clear.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// clear the container and reinspect   
    c1.clear();   
    System::Console::WriteLine("size() = {0}", c1.size());   

    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   

// display contents " [a 1] [b 2]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    c1.clear();   
    System::Console::WriteLine("size() = {0}", c1.size());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
size() = 0  
 [a 1] [b 2]  
size() = 0  

hash_multimap::const_iterator (STL/CLR)

The type of a constant iterator for the controlled sequence.

Syntax

typedef T2 const_iterator;  

Remarks

The type describes an object of unspecified type T2 that can serve as a constant bidirectional iterator for the controlled sequence.

Example

// cliext_hash_multimap_const_iterator.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    Myhash_multimap::const_iterator cit = c1.begin();   
    for (; cit != c1.end(); ++cit)   
        System::Console::Write(" [{0} {1}]", cit->first, cit->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  

hash_multimap::const_reference (STL/CLR)

The type of a constant reference to an element.

Syntax

typedef value_type% const_reference;  

Remarks

The type describes a constant reference to an element.

Example

// cliext_hash_multimap_const_reference.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    Myhash_multimap::const_iterator cit = c1.begin();   
    for (; cit != c1.end(); ++cit)   
        {   // get a const reference to an element   
        Myhash_multimap::const_reference cref = *cit;   
        System::Console::Write(" [{0} {1}]", cref->first, cref->second);   
        }   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  

hash_multimap::const_reverse_iterator (STL/CLR)

The type of a constant reverse iterator for the controlled sequence..

Syntax

typedef T4 const_reverse_iterator;  

Remarks

The type describes an object of unspecified type T4 that can serve as a constant reverse iterator for the controlled sequence.

Example

// cliext_hash_multimap_const_reverse_iterator.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]" reversed   
    Myhash_multimap::const_reverse_iterator crit = c1.rbegin();   
    for (; crit != c1.rend(); ++crit)   
        System::Console::Write(" [{0} {1}]", crit->first, crit->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[c 3] [b 2] [a 1]  

hash_multimap::count (STL/CLR)

Finds the number of elements matching a specified key.

Syntax

size_type count(key_type key);  

Parameters

key
Key value to search for.

Remarks

The member function returns the number of elements in the controlled sequence that have equivalent ordering with key. You use it to determine the number of elements currently in the controlled sequence that match a specified key.

Example

// cliext_hash_multimap_count.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

    System::Console::WriteLine("count(L'A') = {0}", c1.count(L'A'));   
    System::Console::WriteLine("count(L'b') = {0}", c1.count(L'b'));   
    System::Console::WriteLine("count(L'C') = {0}", c1.count(L'C'));   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
count(L'A') = 0  
count(L'b') = 1  
count(L'C') = 0  

hash_multimap::difference_type (STL/CLR)

The types of a signed distance between two elements.

Syntax

typedef int difference_type;  

Remarks

The type describes a possibly negative element count.

Example

// cliext_hash_multimap_difference_type.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// compute positive difference   
    Myhash_multimap::difference_type diff = 0;   
    for (Myhash_multimap::iterator it = c1.begin(); it != c1.end(); ++it)   
        ++diff;   
    System::Console::WriteLine("end()-begin() = {0}", diff);   

// compute negative difference   
    diff = 0;   
    for (Myhash_multimap::iterator it = c1.end(); it != c1.begin(); --it)   
        --diff;   
    System::Console::WriteLine("begin()-end() = {0}", diff);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
end()-begin() = 3  
begin()-end() = -3  

hash_multimap::empty (STL/CLR)

Tests whether no elements are present.

Syntax

bool empty();  

Remarks

The member function returns true for an empty controlled sequence. It is equivalent to hash_multimap::size (STL/CLR)() == 0. You use it to test whether the hash_multimap is empty.

Example

// cliext_hash_multimap_empty.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    System::Console::WriteLine("size() = {0}", c1.size());   
    System::Console::WriteLine("empty() = {0}", c1.empty());   

// clear the container and reinspect   
    c1.clear();   
    System::Console::WriteLine("size() = {0}", c1.size());   
    System::Console::WriteLine("empty() = {0}", c1.empty());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
size() = 3  
empty() = False  
size() = 0  
empty() = True  

hash_multimap::end (STL/CLR)

Designates the end of the controlled sequence.

Syntax

iterator end();  

Remarks

The member function returns a bidirectional iterator that points just beyond the end of the controlled sequence. You use it to obtain an iterator that designates the end of the controlled sequence; its status doesn not change if the length of the controlled sequence changes.

Example

// cliext_hash_multimap_end.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect last two items   
    Myhash_multimap::iterator it = c1.end();   
    --it;   
    --it;   
    System::Console::WriteLine("*-- --end() = [{0} {1}]",   
        it->first, it->second);   
    ++it;   
    System::Console::WriteLine("*--end() = [{0} {1}]",   
        it->first, it->second);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
*-- --end() = [b 2]  
*--end() = [c 3]  

hash_multimap::equal_range (STL/CLR)

Finds range that matches a specified key.

Syntax

cliext::pair<iterator, iterator> equal_range(key_type key);  

Parameters

key
Key value to search for.

Remarks

The member function returns a pair of iterators cliext::pair<iterator, iterator>( hash_multimap::lower_bound (STL/CLR)(key), hash_multimap::upper_bound (STL/CLR)(key)). You use it to determine the range of elements currently in the controlled sequence that match a specified key.

Example

// cliext_hash_multimap_equal_range.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
typedef Myhash_multimap::pair_iter_iter Pairii;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// display results of failed search   
    Pairii pair1 = c1.equal_range(L'x');   
    System::Console::WriteLine("equal_range(L'x') empty = {0}",   
        pair1.first == pair1.second);   

// display results of successful search   
    pair1 = c1.equal_range(L'b');   
    for (; pair1.first != pair1.second; ++pair1.first)   
        System::Console::Write(" [{0} {1}]",   
            pair1.first->first, pair1.first->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
equal_range(L'x') empty = True  
 [b 2]  

hash_multimap::erase (STL/CLR)

Removes elements at specified positions.

Syntax

iterator erase(iterator where);  
iterator erase(iterator first, iterator last);  
bool erase(key_type key)  

Parameters

first
Beginning of range to erase.

key
Key value to erase.

last
End of range to erase.

where
Element to erase.

Remarks

The first member function removes the element of the controlled sequence pointed to by where, and returns an iterator that designates the first element remaining beyond the element removed, or hash_multimap::end (STL/CLR)() if no such element exists. You use it to remove a single element.

The second member function removes the elements of the controlled sequence in the range [first, last), and returns an iterator that designates the first element remaining beyond any elements removed, or end() if no such element exists.. You use it to remove zero or more contiguous elements.

The third member function removes any element of the controlled sequence whose key has equivalent ordering to key, and returns a count of the number of elements removed. You use it to remove and count all elements that match a specified key.

Each element erasure takes time proportional to the logarithm of the number of elements in the controlled sequence.

Example

// cliext_hash_multimap_erase.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    cliext::hash_multimap<wchar_t, int> c1;   
    c1.insert(cliext::hash_multimap<wchar_t, int>::make_value(L'a', 1));   
    c1.insert(cliext::hash_multimap<wchar_t, int>::make_value(L'b', 2));   
    c1.insert(cliext::hash_multimap<wchar_t, int>::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (cliext::hash_multimap<wchar_t, int>::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// erase an element and reinspect   
    cliext::hash_multimap<wchar_t, int>::iterator it =   
        c1.erase(c1.begin());   
    System::Console::WriteLine("erase(begin()) = [{0} {1}]",   
        it->first, it->second);   

// add elements and display " b c d e"   
    c1.insert(cliext::hash_multimap<wchar_t, int>::make_value(L'd', 4));   
    c1.insert(cliext::hash_multimap<wchar_t, int>::make_value(L'e', 5));   
    for each (cliext::hash_multimap<wchar_t, int>::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// erase all but end   
    it = c1.end();   
    it = c1.erase(c1.begin(), --it);   
    System::Console::WriteLine("erase(begin(), end()-1) = [{0} {1}]",   
        it->first, it->second);   
    System::Console::WriteLine("size() = {0}", c1.size());   

// erase end   
    System::Console::WriteLine("erase(L'x') = {0}", c1.erase(L'x'));   
    System::Console::WriteLine("erase(L'e') = {0}", c1.erase(L'e'));   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
erase(begin()) = [b 2]  
 [b 2] [c 3] [d 4] [e 5]  
erase(begin(), end()-1) = [e 5]  
size() = 1  
erase(L'x') = 0  
erase(L'e') = 1  

hash_multimap::find (STL/CLR)

Finds an element that matches a specified key.

Syntax

iterator find(key_type key);  

Parameters

key
Key value to search for.

Remarks

If at least one element in the controlled sequence has equivalent ordering with key, the member function returns an iterator designating one of those elements; otherwise it returns hash_multimap::end (STL/CLR)(). You use it to locate an element currently in the controlled sequence that matches a specified key.

Example

// cliext_hash_multimap_find.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

    System::Console::WriteLine("find {0} = {1}",   
        L'A', c1.find(L'A') != c1.end());   

    Myhash_multimap::iterator it = c1.find(L'b');   
    System::Console::WriteLine("find {0} = [{1} {2}]",   
        L'b', it->first, it->second);   

    System::Console::WriteLine("find {0} = {1}",   
        L'C', c1.find(L'C') != c1.end());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
find A = False  
find b = [b 2]  
find C = False  

hash_multimap::generic_container (STL/CLR)

The type of the generic interface for the container.

Syntax

typedef Microsoft::VisualC::StlClr::  
    IHash<GKey, GValue>  
    generic_container;  

Remarks

The type describes the generic interface for this template container class.

Example

// cliext_hash_multimap_generic_container.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct a generic container   
    Myhash_multimap::generic_container^ gc1 = %c1;   
    for each (Myhash_multimap::value_type elem in gc1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// modify generic and display original   
    gc1->insert(Myhash_multimap::make_value(L'd', 4));   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// modify original and display generic   
    c1.insert(Myhash_multimap::make_value(L'e', 5));   
    for each (Myhash_multimap::value_type elem in gc1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  
[a 1] [b 2] [c 3]  
[a 1] [b 2] [c 3] [d 4]  
[a 1] [b 2] [c 3] [d 4] [e 5]  

hash_multimap::generic_iterator (STL/CLR)

The type of an iterator for use with the generic interface for the container.

Syntax

typedef Microsoft::VisualC::StlClr::Generic::  
    ContainerBidirectionalIterator<generic_value>  
    generic_iterator;  

Remarks

The type describes a generic iterator that can be used with the generic interface for this template container class.

Example

// cliext_hash_multimap_generic_iterator.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct a generic container   
    Myhash_multimap::generic_container^ gc1 = %c1;   
    for each (Myhash_multimap::value_type elem in gc1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// get an element and display it   
    Myhash_multimap::generic_iterator gcit = gc1->begin();   
    Myhash_multimap::generic_value gcval = *gcit;   
    System::Console::Write(" [{0} {1}]", gcval->first, gcval->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  
[a 1] [b 2] [c 3]  
[a 1]  

hash_multimap::generic_reverse_iterator (STL/CLR)

The type of a reverse iterator for use with the generic interface for the container.

Syntax

typedef Microsoft::VisualC::StlClr::Generic::  
    ReverseRandomAccessIterator<generic_value>  
    generic_reverse_iterator;  

Remarks

The type describes a generic reverse iterator that can be used with the generic interface for this template container class.

Example

// cliext_hash_multimap_generic_reverse_iterator.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct a generic container   
    Myhash_multimap::generic_container^ gc1 = %c1;   
    for each (Myhash_multimap::value_type elem in gc1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// get an element and display it   
    Myhash_multimap::generic_reverse_iterator gcit = gc1->rbegin();   
    Myhash_multimap::generic_value gcval = *gcit;   
    System::Console::WriteLine(" [{0} {1}]", gcval->first, gcval->second);   
    return (0);   
    }  
[a 1] [b 2] [c 3]  
[a 1] [b 2] [c 3]  
[c 3]  

hash_multimap::generic_value (STL/CLR)

The type of an element for use with the generic interface for the container.

Syntax

typedef GValue generic_value;  

Remarks

The type describes an object of type GValue that describes the stored element value for use with the generic interface for this template container class.

Example

// cliext_hash_multimap_generic_value.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct a generic container   
    Myhash_multimap::generic_container^ gc1 = %c1;   
    for each (Myhash_multimap::value_type elem in gc1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// get an element and display it   
    Myhash_multimap::generic_iterator gcit = gc1->begin();   
    Myhash_multimap::generic_value gcval = *gcit;   
    System::Console::WriteLine(" [{0} {1}]", gcval->first, gcval->second);   
    return (0);   
    }  
[a 1] [b 2] [c 3]  
[a 1] [b 2] [c 3]  
[a 1]  

hash_multimap::hash_delegate (STL/CLR)

Finds an element that matches a specified key.

Syntax

hasher^ hash_delegate();  

Remarks

The member function returns the delegate used to convert a key value to an integer. You use it to hash a key.

Example

// cliext_hash_multimap_hash_delegate.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    Myhash_multimap::hasher^ myhash = c1.hash_delegate();   

    System::Console::WriteLine("hash(L'a') = {0}", myhash(L'a'));   
    System::Console::WriteLine("hash(L'b') = {0}", myhash(L'b'));   
    return (0);   
    }  
hash(L'a') = 1616896120  
hash(L'b') = 570892832  

hash_multimap::hash_multimap (STL/CLR)

Constructs a container object.

Syntax

hash_multimap();  
explicit hash_multimap(key_compare^ pred);  
hash_multimap(key_compare^ pred, hasher^ hashfn);  
hash_multimap(hash_multimap<Key, Mapped>% right);  
hash_multimap(hash_multimap<Key, Mapped>^ right);  
template<typename InIter>  
    hash_multimaphash_multimap(InIter first, InIter last);  
template<typename InIter>  
    hash_multimap(InIter first, InIter last,  
        key_compare^ pred);  
template<typename InIter>  
    hash_multimap(InIter first, InIter last,  
        key_compare^ pred, hasher^ hashfn);  
hash_multimap(System::Collections::Generic::IEnumerable<GValue>^ right);  
hash_multimap(System::Collections::Generic::IEnumerable<GValue>^ right,  
    key_compare^ pred);  
hash_multimap(System::Collections::Generic::IEnumerable<GValue>^ right,  
    key_compare^ pred, hasher^ hashfn);  

Parameters

first
Beginning of range to insert.

hashfn
Hash function for mapping keys to buckets.

last
End of range to insert.

pred
Ordering predicate for the controlled sequence.

right
Object or range to insert.

Remarks

The constructor:

hash_multimap();

initializes the controlled sequence with no elements, with the default ordering predicate key_compare(), and with the default hash function. You use it to specify an empty initial controlled sequence, with the default ordering predicate and hash function.

The constructor:

explicit hash_multimap(key_compare^ pred);

initializes the controlled sequence with no elements, with the ordering predicate pred, and with the default hash function. You use it to specify an empty initial controlled sequence, with the specified ordering predicate and the default hash function.

The constructor:

hash_multimap(key_compare^ pred, hasher^ hashfn);

initializes the controlled sequence with no elements, with the ordering predicate pred, and with the hash function hashfn. You use it to specify an empty initial controlled sequence, with the specified ordering predicate and hash function.

The constructor:

hash_multimap(hash_multimap<Key, Mapped>% right);

initializes the controlled sequence with the sequence [right.begin(), right.end()), with the default ordering predicate, and with the default hash function. You use it to specify an initial controlled sequence that is a copy of the sequence controlled by the hash_multimap object right, with the default ordering predicate and hash function.

The constructor:

hash_multimap(hash_multimap<Key, Mapped>^ right);

initializes the controlled sequence with the sequence [right->begin(), right->end()), with the default ordering predicate, and with the default hash function. You use it to specify an initial controlled sequence that is a copy of the sequence controlled by the hash_multimap object right, with the default ordering predicate and hash function.

The constructor:

template<typename InIter> hash_multimap(InIter first, InIter last);

initializes the controlled sequence with the sequence [first, last), with the default ordering predicate, and with the default hash function. You use it to make the controlled sequence a copy of another sequence, with the default ordering predicate and hash function.

The constructor:

template<typename InIter> hash_multimap(InIter first, InIter last, key_compare^ pred);

initializes the controlled sequence with the sequence [first, last), with the ordering predicate pred, and with the default hash function. You use it to make the controlled sequence a copy of another sequence, with the specified ordering predicate and the default hash function.

The constructor:

template<typename InIter> hash_multimap(InIter first, InIter last, key_compare^ pred, hasher^ hashfn);

initializes the controlled sequence with the sequence [first, last), with the ordering predicate pred, and with the hash function hashfn. You use it to make the controlled sequence a copy of another sequence, with the specified ordering predicate and hash function.

The constructor:

hash_multimap(System::Collections::Generic::IEnumerable<Key>^ right);

initializes the controlled sequence with the sequence designated by the enumerator right, with the default ordering predicate, and with the default hash function. You use it to make the controlled sequence a copy of another sequence described by an enumerator, with the default ordering predicate and hash function.

The constructor:

hash_multimap(System::Collections::Generic::IEnumerable<Key>^ right, key_compare^ pred);

initializes the controlled sequence with the sequence designated by the enumerator right, with the ordering predicate pred, and with the default hash function. You use it to make the controlled sequence a copy of another sequence described by an enumerator, with the specified ordering predicate and default hash function.

The constructor:

hash_multimap(System::Collections::Generic::IEnumerable<Key>^ right, key_compare^ pred, hasher^ hashfn);

initializes the controlled sequence with the sequence designated by the enumerator right, with the ordering predicate pred, and with the hash function hashfn. You use it to make the controlled sequence a copy of another sequence described by an enumerator, with the specified ordering predicate and hash function.

Example

// cliext_hash_multimap_construct.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

int myfun(wchar_t key)   
    { // hash a key   
    return (key ^ 0xdeadbeef);   
    }   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
// construct an empty container   
    Myhash_multimap c1;   
    System::Console::WriteLine("size() = {0}", c1.size());   

    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct with an ordering rule   
    Myhash_multimap c2 = cliext::greater_equal<wchar_t>();   
    System::Console::WriteLine("size() = {0}", c2.size());   

    c2.insert(c1.begin(), c1.end());   
    for each (Myhash_multimap::value_type elem in c2)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct with an ordering rule and hash function   
    Myhash_multimap c2h(cliext::greater_equal<wchar_t>(),   
        gcnew Myhash_multimap::hasher(&myfun));   
    System::Console::WriteLine("size() = {0}", c2h.size());   

    c2h.insert(c1.begin(), c1.end());   
    for each (Myhash_multimap::value_type elem in c2h)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    System::Console::WriteLine();   

// construct with an iterator range   
    Myhash_multimap c3(c1.begin(), c1.end());   
    for each (Myhash_multimap::value_type elem in c3)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct with an iterator range and an ordering rule   
    Myhash_multimap c4(c1.begin(), c1.end(),   
        cliext::greater_equal<wchar_t>());   
    for each (Myhash_multimap::value_type elem in c4)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct with an iterator range and an ordering rule and hash function   
    Myhash_multimap c4h(c1.begin(), c1.end(),   
        cliext::greater_equal<wchar_t>(),   
        gcnew Myhash_multimap::hasher(&myfun));   
    for each (Myhash_multimap::value_type elem in c4h)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    System::Console::WriteLine();   

// construct with an enumeration   
    Myhash_multimap c5(   // NOTE: cast is not needed   
        (System::Collections::Generic::IEnumerable<   
            Myhash_multimap::value_type>^)%c3);   
    for each (Myhash_multimap::value_type elem in c5)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct with an enumeration and an ordering rule   
    Myhash_multimap c6(   // NOTE: cast is not needed   
        (System::Collections::Generic::IEnumerable<   
            Myhash_multimap::value_type>^)%c3,   
                cliext::greater_equal<wchar_t>());   
    for each (Myhash_multimap::value_type elem in c6)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct with an enumeration and an ordering rule and hash function   
    Myhash_multimap c6h(   // NOTE: cast is not needed   
        (System::Collections::Generic::IEnumerable<   
            Myhash_multimap::value_type>^)%c3,   
                cliext::greater_equal<wchar_t>(),   
                gcnew Myhash_multimap::hasher(&myfun));   
    for each (Myhash_multimap::value_type elem in c6h)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    System::Console::WriteLine();   

// construct by copying another container   
    Myhash_multimap c7(c4);   
    for each (Myhash_multimap::value_type elem in c7)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct by copying a container handle   
    Myhash_multimap c8(%c3);   
    for each (Myhash_multimap::value_type elem in c8)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
size() = 0  
 [a 1] [b 2] [c 3]  
size() = 0  
 [a 1] [b 2] [c 3]  
size() = 0  
 [c 3] [b 2] [a 1]  

 [a 1] [b 2] [c 3]  
 [a 1] [b 2] [c 3]  
 [c 3] [b 2] [a 1]  

 [a 1] [b 2] [c 3]  
 [a 1] [b 2] [c 3]  
 [c 3] [b 2] [a 1]  

 [a 1] [b 2] [c 3]  
 [a 1] [b 2] [c 3]  

hash_multimap::hasher (STL/CLR)

The hashing delegate for a key.

Syntax

Microsoft::VisualC::StlClr::UnaryDelegate<GKey, int>  
    hasher;  

Remarks

The type describes a delegate that converts a key value to an integer.

Example

// cliext_hash_multimap_hasher.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    Myhash_multimap::hasher^ myhash = c1.hash_delegate();   

    System::Console::WriteLine("hash(L'a') = {0}", myhash(L'a'));   
    System::Console::WriteLine("hash(L'b') = {0}", myhash(L'b'));   
    return (0);   
    }  
hash(L'a') = 1616896120  
hash(L'b') = 570892832  

hash_multimap::insert (STL/CLR)

Adds elements.

Syntax

iterator insert(value_type val);  
iterator insert(iterator where, value_type val);  
template<typename InIter>  
    void insert(InIter first, InIter last);  
void insert(System::Collections::Generic::IEnumerable<value_type>^ right);  

Parameters

first
Beginning of range to insert.

last
End of range to insert.

right
Enumeration to insert.

val
Key value to insert.

where
Where in container to insert (hint only).

Remarks

Each of the member functions inserts a sequence specified by the remaining operands.

The first member function inserts an element with value val, and returns an iterator that designates the newly inserted element. You use it to insert a single element.

The second member function inserts an element with value val, using where as a hint (to improve performance), and returns an iterator that designates the newly inserted element. You use it to insert a single element which might be adjacent to an element you know.

The third member function inserts the sequence [first, last). You use it to insert zero or more elements copied from another sequence.

The fourth member function inserts the sequence designated by the right. You use it to insert a sequence described by an enumerator.

Each element insertion takes time proportional to the logarithm of the number of elements in the controlled sequence. Insertion can occur in amortized constant time, however, given a hint that designates an element adjacent to the insertion point.

Example

// cliext_hash_multimap_insert.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// insert a single value, unique and duplicate   
    Myhash_multimap::iterator it =   
        c1.insert(Myhash_multimap::make_value(L'x', 24));   
    System::Console::WriteLine("insert([L'x' 24]) = [{0} {1}]",   
        it->first, it->second);   

    it = c1.insert(Myhash_multimap::make_value(L'b', 2));   
    System::Console::WriteLine("insert([L'b' 2]) = [{0} {1}]",   
        it->first, it->second);   

    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// insert a single value with hint   
    it = c1.insert(c1.begin(), Myhash_multimap::make_value(L'y', 25));   
    System::Console::WriteLine("insert(begin(), [L'y' 25]) = [{0} {1}]",   
        it->first, it->second);   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// insert an iterator range   
    Myhash_multimap c2;   
    it = c1.end();   
    c2.insert(c1.begin(), --it);   
    for each (Myhash_multimap::value_type elem in c2)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// insert an enumeration   
    Myhash_multimap c3;   
    c3.insert(   // NOTE: cast is not needed   
        (System::Collections::Generic::   
            IEnumerable<Myhash_multimap::value_type>^)%c1);   
    for each (Myhash_multimap::value_type elem in c3)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
insert([L'x' 24]) = [x 24]  
insert([L'b' 2]) = [b 2]  
 [a 1] [b 2] [b 2] [c 3] [x 24]  
insert(begin(), [L'y' 25]) = [y 25]  
 [a 1] [b 2] [b 2] [c 3] [x 24] [y 25]  
 [a 1] [b 2] [b 2] [c 3] [x 24]  
 [a 1] [b 2] [b 2] [c 3] [x 24] [y 25]  

hash_multimap::iterator (STL/CLR)

The type of an iterator for the controlled sequence.

Syntax

typedef T1 iterator;  

Remarks

The type describes an object of unspecified type T1 that can serve as a bidirectional iterator for the controlled sequence.

Example

// cliext_hash_multimap_iterator.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    Myhash_multimap::iterator it = c1.begin();   
    for (; it != c1.end(); ++it)   
        System::Console::Write(" [{0} {1}]", it->first, it->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  

hash_multimap::key_comp (STL/CLR)

Copies the ordering delegate for two keys.

Syntax

key_compare^key_comp();  

Remarks

The member function returns the ordering delegate used to order the controlled sequence. You use it to compare two keys.

Example

// cliext_hash_multimap_key_comp.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    Myhash_multimap::key_compare^ kcomp = c1.key_comp();   

    System::Console::WriteLine("compare(L'a', L'a') = {0}",   
        kcomp(L'a', L'a'));   
    System::Console::WriteLine("compare(L'a', L'b') = {0}",   
        kcomp(L'a', L'b'));   
    System::Console::WriteLine("compare(L'b', L'a') = {0}",   
        kcomp(L'b', L'a'));   
    System::Console::WriteLine();   

// test a different ordering rule   
    Myhash_multimap c2 = cliext::greater<wchar_t>();   
    kcomp = c2.key_comp();   

    System::Console::WriteLine("compare(L'a', L'a') = {0}",   
        kcomp(L'a', L'a'));   
    System::Console::WriteLine("compare(L'a', L'b') = {0}",   
        kcomp(L'a', L'b'));   
    System::Console::WriteLine("compare(L'b', L'a') = {0}",   
        kcomp(L'b', L'a'));   
    return (0);   
    }  
compare(L'a', L'a') = True  
compare(L'a', L'b') = True  
compare(L'b', L'a') = False  

compare(L'a', L'a') = False  
compare(L'a', L'b') = False  
compare(L'b', L'a') = True  

hash_multimap::key_compare (STL/CLR)

The ordering delegate for two keys.

Syntax

Microsoft::VisualC::StlClr::BinaryDelegate<GKey, GKey, bool>  
    key_compare;  

Remarks

The type is a synonym for the delegate that determines the ordering of its key arguments.

Example

// cliext_hash_multimap_key_compare.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    Myhash_multimap::key_compare^ kcomp = c1.key_comp();   

    System::Console::WriteLine("compare(L'a', L'a') = {0}",   
        kcomp(L'a', L'a'));   
    System::Console::WriteLine("compare(L'a', L'b') = {0}",   
        kcomp(L'a', L'b'));   
    System::Console::WriteLine("compare(L'b', L'a') = {0}",   
        kcomp(L'b', L'a'));   
    System::Console::WriteLine();   

// test a different ordering rule   
    Myhash_multimap c2 = cliext::greater<wchar_t>();   
    kcomp = c2.key_comp();   

    System::Console::WriteLine("compare(L'a', L'a') = {0}",   
        kcomp(L'a', L'a'));   
    System::Console::WriteLine("compare(L'a', L'b') = {0}",   
        kcomp(L'a', L'b'));   
    System::Console::WriteLine("compare(L'b', L'a') = {0}",   
        kcomp(L'b', L'a'));   
    return (0);   
    }  
compare(L'a', L'a') = True  
compare(L'a', L'b') = True  
compare(L'b', L'a') = False  

compare(L'a', L'a') = False  
compare(L'a', L'b') = False  
compare(L'b', L'a') = True  

hash_multimap::key_type (STL/CLR)

The type of an ordering key.

Syntax

typedef Key key_type;  

Remarks

The type is a synonym for the template parameter Key.

Example

// cliext_hash_multimap_key_type.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]" using key_type   
    for (Myhash_multimap::iterator it = c1.begin(); it != c1.end(); ++it)   
        {   // store element in key_type object   
        Myhash_multimap::key_type val = it->first;   

        System::Console::Write(" {0}", val);   
        }   
    System::Console::WriteLine();   
    return (0);   
    }  
a b c  

hash_multimap::load_factor (STL/CLR)

Counts the average elements per bucket.

Syntax

float load_factor();  

Remarks

The member function returns (float)hash_multimap::size (STL/CLR)() / hash_multimap::bucket_count (STL/CLR)(). You use it to determine the average bucket size.

Example

// cliext_hash_multimap_load_factor.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1 = gcnew Myhash_multimap;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect current parameters   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// change max_load_factor and redisplay   
    c1.max_load_factor(0.25f);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// rehash and redisplay   
    c1.rehash(100);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 4  

bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 0.25  

bucket_count() = 128  
load_factor() = 0.0234375  
max_load_factor() = 0.25  

hash_multimap::lower_bound (STL/CLR)

Finds beginning of range that matches a specified key.

Syntax

iterator lower_bound(key_type key);  

Parameters

key
Key value to search for.

Remarks

The member function determines the first element X in the controlled sequence that hashes to the same bucket as key and has equivalent ordering to key. If no such element exists, it returns hash_multimap::end (STL/CLR)(); otherwise it returns an iterator that designates X. You use it to locate the beginning of a sequence of elements currently in the controlled sequence that match a specified key.

Example

// cliext_hash_multimap_lower_bound.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

    System::Console::WriteLine("lower_bound(L'x')==end() = {0}",   
        c1.lower_bound(L'x') == c1.end());   

    Myhash_multimap::iterator it = c1.lower_bound(L'a');   
    System::Console::WriteLine("*lower_bound(L'a') = [{0} {1}]",   
        it->first, it->second);   
    it = c1.lower_bound(L'b');   
    System::Console::WriteLine("*lower_bound(L'b') = [{0} {1}]",   
        it->first, it->second);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
lower_bound(L'x')==end() = True  
*lower_bound(L'a') = [a 1]  
*lower_bound(L'b') = [b 2]  

hash_multimap::make_value (STL/CLR)

Constructs a value object.

Syntax

static value_type make_value(key_type key, mapped_type mapped);  

Parameters

key
Key value to use.

mapped
Mapped value to search for.

Remarks

The member function returns a value_type object whose key is key and whose mapped value is mapped. You use it to compose an object suitable for use with several other member functions.

Example

// cliext_hash_multimap_make_value.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  

hash_multimap::mapped_type (STL/CLR)

The type of a mapped value associated with each key.

Syntax

typedef Mapped mapped_type;  

Remarks

The type is a synonym for the template parameter Mapped.

Example

// cliext_hash_multimap_mapped_type.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]" using mapped_type   
    for (Myhash_multimap::iterator it = c1.begin(); it != c1.end(); ++it)   
        {   // store element in mapped_type object   
        Myhash_multimap::mapped_type val = it->second;   

        System::Console::Write(" {0}", val);   
        }   
    System::Console::WriteLine();   
    return (0);   
    }  
1 2 3  

hash_multimap::max_load_factor (STL/CLR)

Gets or sets the maximum elements per bucket.

Syntax

float max_load_factor();  
void max_load_factor(float new_factor);  

Parameters

new_factor
New maximum load factor to store.

Remarks

The first member function returns the current stored maximum load factor. You use it to determine the maximum average bucket size.

The second member function replaces the store maximum load factor with new_factor. No automatic rehashing occurs until a subsequent insert.

Example

// cliext_hash_multimap_max_load_factor.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1 = gcnew Myhash_multimap;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect current parameters   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// change max_load_factor and redisplay   
    c1.max_load_factor(0.25f);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// rehash and redisplay   
    c1.rehash(100);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 4  

bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 0.25  

bucket_count() = 128  
load_factor() = 0.0234375  
max_load_factor() = 0.25  

hash_multimap::operator= (STL/CLR)

Replaces the controlled sequence.

Syntax

hash_multimap<Key, Mapped>% operator=(hash_multimap<Key, Mapped>% right);  

Parameters

right
Container to copy.

Remarks

The member operator copies right to the object, then returns *this. You use it to replace the controlled sequence with a copy of the controlled sequence in right.

Example

// cliext_hash_multimap_operator_as.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// assign to a new container   
    Myhash_multimap c2;   
    c2 = c1;   
// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c2)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  
[a 1] [b 2] [c 3]  

hash_multimap::rbegin (STL/CLR)

Designates the beginning of the reversed controlled sequence.

Syntax

reverse_iterator rbegin();  

Remarks

The member function returns a reverse iterator that designates the last element of the controlled sequence, or just beyond the beginning of an empty sequence. Hence, it designates the beginning of the reverse sequence. You use it to obtain an iterator that designates the current beginning of the controlled sequence seen in reverse order, but its status can change if the length of the controlled sequence changes.

Example

// cliext_hash_multimap_rbegin.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect first two items in reversed sequence   
    Myhash_multimap::reverse_iterator rit = c1.rbegin();   
    System::Console::WriteLine("*rbegin() = [{0} {1}]",   
        rit->first, rit->second);   
    ++rit;   
    System::Console::WriteLine("*++rbegin() = [{0} {1}]",   
        rit->first, rit->second);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
*rbegin() = [c 3]  
*++rbegin() = [b 2]  

hash_multimap::reference (STL/CLR)

The type of a reference to an element.

Syntax

typedef value_type% reference;  

Remarks

The type describes a reference to an element.

Example

// cliext_hash_multimap_reference.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    Myhash_multimap::iterator it = c1.begin();   
    for (; it != c1.end(); ++it)   
        {   // get a reference to an element   
        Myhash_multimap::reference ref = *it;   
        System::Console::Write(" [{0} {1}]", ref->first, ref->second);   
        }   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  

hash_multimap::rehash (STL/CLR)

Rebuilds the hash table.

Syntax

void rehash();  

Remarks

The member function rebuilds the hash table, ensuring that hash_multimap::load_factor (STL/CLR)() <= hash_multimap::max_load_factor (STL/CLR). Otherwise, the hash table increases in size only as needed after an insertion. (It never automatically decreases in size.) You use it to adjust the size of the hash table.

Example

// cliext_hash_multimap_rehash.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1 = gcnew Myhash_multimap;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect current parameters   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// change max_load_factor and redisplay   
    c1.max_load_factor(0.25f);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    System::Console::WriteLine();   

// rehash and redisplay   
    c1.rehash(100);   
    System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());   
    System::Console::WriteLine("load_factor() = {0}", c1.load_factor());   
    System::Console::WriteLine("max_load_factor() = {0}",   
        c1.max_load_factor());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 4  

bucket_count() = 16  
load_factor() = 0.1875  
max_load_factor() = 0.25  

bucket_count() = 128  
load_factor() = 0.0234375  
max_load_factor() = 0.25  

hash_multimap::rend (STL/CLR)

Designates the end of the reversed controlled sequence.

Syntax

reverse_iterator rend();  

Remarks

The member function returns a reverse iterator that points just beyond the beginning of the controlled sequence. Hence, it designates the end of the reverse sequence. You use it to obtain an iterator that designates the current end of the controlled sequence seen in reverse order, but its status can change if the length of the controlled sequence changes.

Example

// cliext_hash_multimap_rend.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// inspect first two items in reversed sequence   
    Myhash_multimap::reverse_iterator rit = c1.rend();   
    --rit;   
    --rit;   
    System::Console::WriteLine("*-- --rend() = [{0} {1}]",   
        rit->first, rit->second);   
    ++rit;   
    System::Console::WriteLine("*--rend() = [{0} {1}]",   
        rit->first, rit->second);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
*-- --rend() = [b 2]  
*--rend() = [a 1]  

hash_multimap::reverse_iterator (STL/CLR)

The type of a reverse iterator for the controlled sequence.

Syntax

typedef T3 reverse_iterator;  

Remarks

The type describes an object of unspecified type T3 that can serve as a reverse iterator for the controlled sequence.

Example

// cliext_hash_multimap_reverse_iterator.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]" reversed   
    Myhash_multimap::reverse_iterator rit = c1.rbegin();   
    for (; rit != c1.rend(); ++rit)   
        System::Console::Write(" [{0} {1}]", rit->first, rit->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[c 3] [b 2] [a 1]  

hash_multimap::size (STL/CLR)

Counts the number of elements.

Syntax

size_type size();  

Remarks

The member function returns the length of the controlled sequence. You use it to determine the number of elements currently in the controlled sequence. If all you care about is whether the sequence has nonzero size, see hash_multimap::empty (STL/CLR)().

Example

// cliext_hash_multimap_size.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// clear the container and reinspect   
    c1.clear();   
    System::Console::WriteLine("size() = {0} after clearing", c1.size());   

// add elements and clear again   
    c1.insert(Myhash_multimap::make_value(L'd', 4));   
    c1.insert(Myhash_multimap::make_value(L'e', 5));   
    System::Console::WriteLine("size() = {0} after adding 2", c1.size());   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
size() = 0 after clearing  
size() = 2 after adding 2  

hash_multimap::size_type (STL/CLR)

The type of a signed distance between two element.

Syntax

typedef int size_type;  

Remarks

The type describes a non-negative element count.

Example

// cliext_hash_multimap_size_type.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// compute positive difference   
    Myhash_multimap::size_type diff = 0;   
    for (Myhash_multimap::iterator it = c1.begin(); it != c1.end(); ++it)   
        ++diff;   
    System::Console::WriteLine("end()-begin() = {0}", diff);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
end()-begin() = 3  

hash_multimap::swap (STL/CLR)

Swaps the contents of two containers.

Syntax

void swap(hash_multimap<Key, Mapped>% right);  

Parameters

right
Container to swap contents with.

Remarks

The member function swaps the controlled sequences between this and right. It does so in constant time and it throws no exceptions. You use it as a quick way to exchange the contents of two containers.

Example

// cliext_hash_multimap_swap.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// construct another container with repetition of values   
    Myhash_multimap c2;   
    c2.insert(Myhash_multimap::make_value(L'd', 4));   
    c2.insert(Myhash_multimap::make_value(L'e', 5));   
    c2.insert(Myhash_multimap::make_value(L'f', 6));   
    for each (Myhash_multimap::value_type elem in c2)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// swap and redisplay   
    c1.swap(c2);   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

    for each (Myhash_multimap::value_type elem in c2)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]  
[d 4] [e 5] [f 6]  
[d 4] [e 5] [f 6]  
[a 1] [b 2] [c 3]  

hash_multimap::to_array (STL/CLR)

Copies the controlled sequence to a new array.

Syntax

cli::array<value_type>^ to_array();  

Remarks

The member function returns an array containing the controlled sequence. You use it to obtain a copy of the controlled sequence in array form.

Example

// cliext_hash_multimap_to_array.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// copy the container and modify it   
    cli::array<Myhash_multimap::value_type>^ a1 = c1.to_array();   

    c1.insert(Myhash_multimap::make_value(L'd', 4));   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

// display the earlier array copy   
    for each (Myhash_multimap::value_type elem in a1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3] [d 4]  
[a 1] [b 2] [c 3]  

hash_multimap::upper_bound (STL/CLR)

Finds end of range that matches a specified key.

Syntax

iterator upper_bound(key_type key);  

Parameters

key
Key value to search for.

Remarks

The member function determines the last element X in the controlled sequence that hashes to the same bucket as key and has equivalent ordering to key. If no such element exists, or if X is the last element in the controlled sequence, it returns hash_multimap::end (STL/CLR)(); otherwise it returns an iterator that designates the first element beyond X. You use it to locate the end of a sequence of elements currently in the controlled sequence that match a specified key.

Example

// cliext_hash_multimap_upper_bound.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]"   
    for each (Myhash_multimap::value_type elem in c1)   
        System::Console::Write(" [{0} {1}]", elem->first, elem->second);   
    System::Console::WriteLine();   

    System::Console::WriteLine("upper_bound(L'x')==end() = {0}",   
        c1.upper_bound(L'x') == c1.end());   

    Myhash_multimap::iterator it = c1.upper_bound(L'a');   
    System::Console::WriteLine("*upper_bound(L'a') = [{0} {1}]",   
        it->first, it->second);   
    it = c1.upper_bound(L'b');   
    System::Console::WriteLine("*upper_bound(L'b') = [{0} {1}]",   
        it->first, it->second);   
    return (0);   
    }  
 [a 1] [b 2] [c 3]  
upper_bound(L'x')==end() = True  
*upper_bound(L'a') = [b 2]  
*upper_bound(L'b') = [c 3]  

hash_multimap::value_comp (STL/CLR)

Copies the ordering delegate for two element values.

Syntax

value_compare^ value_comp();  

Remarks

The member function returns the ordering delegate used to order the controlled sequence. You use it to compare two element values.

Example

// cliext_hash_multimap_value_comp.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_map<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    Myhash_multimap::value_compare^ kcomp = c1.value_comp();   

    System::Console::WriteLine("compare([L'a', 1], [L'a', 1]) = {0}",   
        kcomp(Myhash_multimap::make_value(L'a', 1),   
            Myhash_multimap::make_value(L'a', 1)));   
    System::Console::WriteLine("compare([L'a', 1], [L'b', 2]) = {0}",   
        kcomp(Myhash_multimap::make_value(L'a', 1),   
            Myhash_multimap::make_value(L'b', 2)));   
    System::Console::WriteLine("compare([L'b', 2], [L'a', 1]) = {0}",   
        kcomp(Myhash_multimap::make_value(L'b', 2),   
            Myhash_multimap::make_value(L'a', 1)));   
    System::Console::WriteLine();   
    return (0);   
    }  
compare([L'a', 1], [L'a', 1]) = True  
compare([L'a', 1], [L'b', 2]) = True  
compare([L'b', 2], [L'a', 1]) = False  

hash_multimap::value_compare (STL/CLR)

The ordering delegate for two element values.

Syntax

Microsoft::VisualC::StlClr::BinaryDelegate<generic_value, generic_value, bool>  
    value_compare;  

Remarks

The type is a synonym for the delegate that determines the ordering of its value arguments.

Example

// cliext_hash_multimap_value_compare.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_map<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    Myhash_multimap::value_compare^ kcomp = c1.value_comp();   

    System::Console::WriteLine("compare([L'a', 1], [L'a', 1]) = {0}",   
        kcomp(Myhash_multimap::make_value(L'a', 1),   
            Myhash_multimap::make_value(L'a', 1)));   
    System::Console::WriteLine("compare([L'a', 1], [L'b', 2]) = {0}",   
        kcomp(Myhash_multimap::make_value(L'a', 1),   
            Myhash_multimap::make_value(L'b', 2)));   
    System::Console::WriteLine("compare([L'b', 2], [L'a', 1]) = {0}",   
        kcomp(Myhash_multimap::make_value(L'b', 2),   
            Myhash_multimap::make_value(L'a', 1)));   
    System::Console::WriteLine();   
    return (0);   
    }  
compare([L'a', 1], [L'a', 1]) = True  
compare([L'a', 1], [L'b', 2]) = True  
compare([L'b', 2], [L'a', 1]) = False  

hash_multimap::value_type (STL/CLR)

The type of an element.

Syntax

typedef generic_value value_type;  

Remarks

The type is a synonym for generic_value.

Example

// cliext_hash_multimap_value_type.cpp   
// compile with: /clr   
#include <cliext/hash_map>   

typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;   
int main()   
    {   
    Myhash_multimap c1;   
    c1.insert(Myhash_multimap::make_value(L'a', 1));   
    c1.insert(Myhash_multimap::make_value(L'b', 2));   
    c1.insert(Myhash_multimap::make_value(L'c', 3));   

// display contents " [a 1] [b 2] [c 3]" using value_type   
    for (Myhash_multimap::iterator it = c1.begin(); it != c1.end(); ++it)   
        {   // store element in value_type object   
        Myhash_multimap::value_type val = *it;   
        System::Console::Write(" [{0} {1}]", val->first, val->second);   
        }   
    System::Console::WriteLine();   
    return (0);   
    }  
[a 1] [b 2] [c 3]