views::transform
C++20Apply a function to each element lazily.
Section hub
Ranges
Min standard notice:
Algorithms and views for range-based programming.
This hub groups the ranges library by user task rather than by raw reference tree shape. View types and adaptor objects are presented as the same conceptual item.
Core adapters
Start here for the adapters most people reach for first when building pipelines.
views::filter
C++20Keep only elements that satisfy a predicate.
views::take
C++20Keep the first N elements from a source range.
views::drop
C++20Skip the first N elements and expose the rest.
views::chunk
C++23Split a range into non-overlapping fixed-size subranges.
views::join
C++20Flatten a range of ranges into a single lazy sequence.
Utility views
These adapt shape, ownership, or projection rather than representing the “headline” pipeline steps.
views::all
C++20Normalize a range into a view-compatible form.
views::common
C++20Adapt iterator/sentinel pairs into a common-range shape.
ref_view
C++20Wrap an existing range by reference.
owning_view
C++20Store and expose a range with unique ownership.
subrange
C++20Package iterator + sentinel as a view-like object.
views::keys
C++20Project tuple-like elements to their key component.
views::values
C++20Project tuple-like elements to their value component.
New in C++23 / C++26
Newer adapters, kept as a compact scan list with only standard badges.
All entities by category
A lighter-weight index of the full ranges surface, grouped by conceptual task instead of raw page-tree names.
All entities by category
A lighter-weight index of the full ranges surface, grouped by conceptual task instead of raw page-tree names.