[section:upgrade Upgrade version of Boost.Range]

[section:upgrade_from_1_42 Upgrade from version 1.42]

New features:

# __range_adaptors__
# __range_algorithms__

Removed:

# `iterator_range` no longer has a `is_singular` member function. The singularity restrictions have been removed from the `iterator_range` class since this added restrictions to ranges of iterators whose default constructors were not singular. Previously the `is_singular` member function always returned `false` in release build configurations, hence it is not anticipated that this interface change will produce difficulty in upgrading.


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[section:upgrade_from_1_34 Upgrade from version 1.34]

Boost version 1.35 introduced some larger refactorings of the library:

# Direct support for character arrays was abandoned in favor of uniform treatment of all arrays. Instead string algorithms can use the new function __as_literal__`()`.
# __size__ now requires a __random_access_range__. The old behavior is provided as __distance__`()`.
# `range_size<T>::type` has been completely removed in favor of `range_difference<T>::type`
# `boost_range_begin()` and `boost_range_end()` have been renamed `range_begin()` and `range_end()` respectively.
# `range_result_iterator<T>::type` and `range_reverse_result_iterator<T>::type` have been renamed `range_iterator<T>::type` and `range_reverse_iterator<T>::type`.
# The procedure that makes a custom type work with the library has been greatly simplified. See __extending_for_udts__ for details.

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