https://bugs.documentfoundation.org/show_bug.cgi?id=170270
Bug ID: 170270
Summary: Use C++20 ranges copy_if, find_if or remove_if to
simplify loops
Product: LibreOffice
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: LibreOffice
Assignee: [email protected]
Reporter: [email protected]
Since C++20, it is possible to process containers in an easier form with
std::ranges. One can rewrite loops with std::ranges functions. It is also
simpler compared to C++11 syntax.
In tdf#170269, I have suggested using std::ranges::all_of, std::ranges::any_of
and std::ranges::none_of. If you want to check/validate a condition over a
range, refer to that issue.
There are multiple functions available in ranges library:
Constrained algorithms (since C++20)
https://en.cppreference.com/w/cpp/algorithm/ranges.html
These are defined in <algorithm> header:
Copy certain elements of a range
std::ranges::copy_if
https://en.cppreference.com/w/cpp/algorithm/ranges/copy.html
Remove elements from a range
std::ranges::remove_if
https://en.cppreference.com/w/cpp/algorithm/ranges/remove.html
Find element in a range
std::ranges::find_if
https://en.cppreference.com/w/cpp/algorithm/ranges/find.html
You can find further information in the above links. These functions (except
find_if) are part of "Modifying sequence operations".
The new std::ranges has a simpler syntax compared to the older std::copy_if,
etc. functions used in tdf#153294, and is a replacement, in most cases.
Please make sure that you keep the code behavior unchanged.
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