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What is the Ranges Library?
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The Ranges library extends the STL by introducing the concept of ranges, which are abstractions over sequences of elements defined by a beginning and an end. Unlike traditional STL algorithms that operate on pairs of iterators, ranges allow you to work with entire sequences as single entities. This leads to cleaner, more readable code and enables lazy evaluation, where operations are only performed when needed.


Key components of the Ranges library include:

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Range concepts: Formal definitions of what constitutes a range (e.g., std::ranges::range).
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Range adaptors: Tools to transform or filter ranges lazily (e.g., std::ranges::filter_view, std::ranges::transform_view).
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Range algorithms: Versions of STL algorithms that operate on ranges directly (e.g., std::ranges::sort, std::ranges::for_each).
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Views: Lightweight, non-owning range types that represent transformations of other ranges.
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The library is available in the &lt;ranges> header, with additional utilities in &lt;algorithm>, &lt;iterator>, and other headers.

Exploring C++ Ranges Library With Detailed Examples