Julia v1.14 Release Notes

New language features

It is now possible to control which version of the Julia syntax will be used to parse a package by setting the compat.julia or syntax.julia_version key in Project.toml. This feature is similar to the notion of "editions" in other language ecosystems and will allow non-breaking evolution of Julia syntax in future versions. See the "Syntax Versioning" section in the code loading documentation (#60018).
ᵅ (U+U+1D45), ᵋ (U+1D4B), ᶲ (U+1DB2), ˱ (U+02F1), ˲ (U+02F2), and ₔ (U+2094) can now also be used as operator suffixes, accessible as \^alpha, \^epsilon, \^ltphi, \_<, \_>, and \_schwa at the REPL (#60285).

New functions Threads.atomic_fence_heavy and Threads.atomic_fence_light provide support for asymmetric atomic fences, speeding up atomic synchronization where one side of the synchronization runs significantly less often than the other (#60311).

IOContext supports a new boolean hexunsigned option that allows for printing unsigned integers in decimal instead of hexadecimal (#60267).

codepoint(c) now succeeds for overlong encodings. Base.ismalformed, Base.isoverlong, and Base.show_invalid are now public and documented (but not exported) (#55152).

@test, @test_throws, and @test_broken now support a context keyword argument that provides additional information displayed on test failure. This is useful for debugging which specific case failed in parameterized tests (#60501).