HashMap

// Unittest that serves as a usage example
static immutable expected_number_of_elements = 1_000;

// Mapping from hash_t -> int
auto map = new HashMap!(int)(expected_number_of_elements);

hash_t hash = 232323;

// Add a mapping
*(map.put(hash)) = 12;

// Look up a mapping and obtain a pointer to the value if found or null
// if not found;
int* val = hash in map;

bool exists = val !is null;

// Remove a mapping
map.remove(hash);

// Clear the map
map.clear();

// Mapping from hash_t -> char[]
auto map2 = new HashMap!(char[])(expected_number_of_elements);

// Add a mapping
char[]* val2 = map2.put(hash);

(*val2).length = "hello".length;
(*val2)[]      = "hello";

// Mapping from hash_t -> struct
struct MyStruct
{
    int x;
    float y;
}

auto map3 = new HashMap!(MyStruct)(expected_number_of_elements);

// Add a mapping, put() never returns null
with (*map3.put(hash))
{
    x = 12;
    y = 23.23;
}