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Boost 1.69 upgrade
Boost has been upgraded to version 1.69 in Fedora 30. This release provides numerous fixes and improvements to libraries.
Improvements include:
A new library: https://www.boost.org/libs/yap/[Boost.YAP].
A new header-only component: https://www.boost.org/libs/safe_numerics/[Boost.Safe Numerics].
Breaking changes in this version are:
**Logic** - use explicit operator bool when available (link:https://github.com/boostorg/logic/pull/5[PR #5])
The following libraries are now discontinued:
**Signals (v1)** (`Boost.Signals`) - removed after being deprecated in Boost 1.54. Users are encouraged to use https://www.boost.org/doc/libs/1_69_0/libs/signals2/[`Boost.Signals2`] instead.
You can find full lists of changes compared to Fedora 29 in upstream release notes:
link:https://www.boost.org/users/history/version_1_69_0.html[1.69 release notes]
link:https://www.boost.org/users/history/version_1_68_0.html[1.68 release notes]