cpp-gsl 4.2.0

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Created by brew bump

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Created with brew bump-formula-pr.

release notes

# GSL 4.2.0 Release Notes
New Features

Added gsl::swap for safely swapping gsl::not_null pointers (#1160)
Introduced element_type member type to gsl::not_null for better type trait consistency (#1196)
Added support for strict_not_null with unique_ptr (#1179)
Added comprehensive test suite for gsl::span including empty span, conversion, and comparison tests (#1189)

Performance Improvements

Significantly improved span_iterator performance with Clang compiler, reducing overhead by up to 20x (#1166)

Bug Fixes

Fixed GCC-specific bug with list initialization of const references (#1175)
Fixed SFINAE implementation in gsl::owner (#1174)
Fixed issues with std::enable_if usage throughout the codebase (#1177)
Modified include directives to use explicit "gsl/" prefix to prevent header conflicts (#1184)
Changed include directives to use relative paths to comply with CppCoreGuideline SF.12 (#1194)

Deprecated Features

Removed deprecated string_span feature (#1185)
Marked the following features as deprecated as they are now in the C++ standard:

gsl::unique_ptr
gsl::shared_ptr
gsl::byte (since C++17)
gsl::joining_thread



Infrastructure Updates

Updated CI pipeline for Ubuntu 24.04
Updated compiler support:

Clang 16, 17, 18
GCC 12, 13, 14


Upgraded to GoogleTest v1.14.0
Added new issue templates
Updated documentation and badges

Thanks to Contributors
Special thanks to the following contributors who helped make GSL 4.2.0 possible:

@ajtruckle
@apenn-msft
@asartori86
@beinhaerter
@daltairwalter
@DanielJump
@HenryHu
@lord-pando
@mhthies
@paparodeo
@tiagomacarios

Your contributions have helped improve GSL's reliability, performance, and usability.

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