Backports from C++11.

C++11 adds a large number of features such as variadic templates, constexpr , static asserts and much improved template support and metaprogramming.

A listing of some of the features backported:

From core: static_assert, #noexcept.
From <cstddef>: #nullptr , #std::nullptr_t.
From <cstdint>: The header proper for C++03, and its utilities.
From <cuchar>: The typedefs char16_t , char32_t , if they are usable in C++03.
From <algorithm>: Copying algorithms copy_if(), copy_n(), partition_copy(), etc.
From <algorithm>: Querying algorithms minmax(), minmax_element(), is_all_of() , is_any_of() , is_none_of() , etc.
From <forward_list>: The header proper for C++03, and its utilities.
From <functional>: #reference_wrapper, ref() / cref() .
From <iterator>: Global iterator accessors rbegin() , rend() .
From <memory>: addressof() , pointer_traits , allocator_traits , etc.
From <numeric>: iota() .
From <random>: #shuffle_order_engine and knuth_b , #uniform_int_distribution, etc.
From <string>: to_string() , stoul() and siblings, etc.
From <system_error>: errc codes , #system_error and others, etc.
From <type_traits>: #decay , #enable_if , #conditional , etc.
From <type_traits>: Some of the nothrow / trivial traits where applicable.
From <utility>: declval() , move() , etc.