Bug 122254 - Extend vector(InputIterator, InputIterator) handling of C++20 iterators to other members and to std::string
Summary: Extend vector(InputIterator, InputIterator) handling of C++20 iterators to ot...
Status: NEW
Alias: None
Product: gcc
Classification: Unclassified
Component: libstdc++ (show other bugs)
Version: 16.0
: P3 enhancement
Target Milestone: ---
Assignee: Not yet assigned to anyone
URL:
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Depends on:
Blocks:
 
Reported: 2025-10-10 23:17 UTC by Jonathan Wakely
Modified: 2025-10-12 05:19 UTC (History)
2 users (show)

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Last reconfirmed: 2025-10-11 00:00:00

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Description Jonathan Wakely 2025-10-10 23:17:36 UTC 
Bug 108487 optimized construction of std::vector from iterators which satisfy the std::forward_iterator concept but do not meet the Cpp17ForwardIterator requirements.

The same optimization should be applied to vector::insert and vector::assign etc.

Also std::basic_string::basic_string(InputIterator, InputIterator).

This is not required by the standard, but would be a QoI improvement.
Comment 1 Andrew Pinski 2025-10-11 20:40:59 UTC 
.