hash_set::equal_range (STL/CLR)

Article
06/05/2017

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The latest version of this topic can be found at hash_set::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_set::lower_bound (STL/CLR)(``key``), hash_set::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_set_equal_range.cpp   
// compile with: /clr   
#include <cliext/hash_set>   
  
typedef cliext::hash_set<wchar_t> Myhash_set;   
typedef Myhash_set::pair_iter_iter Pairii;   
int main()   
    {   
    Myhash_set c1;   
    c1.insert(L'a');   
    c1.insert(L'b');   
    c1.insert(L'c');   
  
// display initial contents " a b c"   
    for each (wchar_t elem in c1)   
        System::Console::Write(" {0}", elem);   
    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}", *pair1.first);   
    System::Console::WriteLine();   
    return (0);   
    }

 a b c  
equal_range
(L'x') empty = True  
 b

Requirements

Header: <cliext/hash_set>

Namespace: cliext

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