Revision 01ddf80f18fc618e20df307945a9c19e74005270 authored by Jameson Nash on 25 May 2023, 13:52:51 UTC, committed by GitHub on 25 May 2023, 13:52:51 UTC
This is to preserve the line number of the macro caller in the output, in case we don't have context from eval on where it occured. But we make slightly more changes than strictly necessary to prepare for future improvements in this area.
1 parent 94bc2f3
NEWS.md
Julia v1.10 Release Notes
========================
New language features
---------------------
* `⥺` (U+297A, `\leftarrowsubset`) and `⥷` (U+2977, `\leftarrowless`)
may now be used as binary operators with arrow precedence. ([#45962])
Language changes
----------------
* When a task forks a child, the parent task's task-local RNG (random number generator) is no longer affected. The seeding of child based on the parent task also takes a more disciplined approach to collision resistance, using a design based on the SplitMix and DotMix splittable RNG schemes ([#49110]).
* A new more-specific rule for methods resolves ambiguities containing Union{} in favor of
the method defined explicitly to handle the Union{} argument. This makes it possible to
define methods to explicitly handle Union{} without the ambiguities that commonly would
result previously. This also lets the runtime optimize certain method lookups in a way
that significantly improves load and inference times for heavily overloaded methods that
dispatch on Types (such as traits and constructors).
* The "h bar" `ℏ` (`\hslash` U+210F) character is now treated as equivalent to `ħ` (`\hbar` U+0127).
Compiler/Runtime improvements
-----------------------------
* The `@pure` macro is now deprecated. Use `Base.@assume_effects :foldable` instead ([#48682]).
* The mark phase of the Garbage Collector is now multi-threaded ([#48600]).
Command-line option changes
---------------------------
* New option `--gcthreads` to set how many threads will be used by the Garbage Collector ([#48600]).
The default is set to `N/2` where `N` is the amount of worker threads (`--threads`) used by Julia.
Multi-threading changes
-----------------------
Build system changes
--------------------
New library functions
---------------------
* `tanpi` is now defined. It computes tan(πx) more accurately than `tan(pi*x)` ([#48575]).
* `fourthroot(x)` is now defined in `Base.Math` and can be used to compute the fourth root of `x`.
It can also be accessed using the unicode character `∜`, which can be typed by `\fourthroot<tab>` ([#48899]).
New library features
--------------------
* The `initialized=true` keyword assignment for `sortperm!` and `partialsortperm!`
is now a no-op ([#47979]). It previously exposed unsafe behavior ([#47977]).
* `binomial(x, k)` now supports non-integer `x` ([#48124]).
* A `CartesianIndex` is now treated as a "scalar" for broadcasting ([#47044]).
* `printstyled` now supports italic output ([#45164]).
* `parent` and `parentindices` support `SubString`s
Standard library changes
------------------------
* `startswith` now supports seekable `IO` streams ([#43055])
* printing integral `Rational`s will skip the denominator in `Rational`-typed IO context (e.g. in `Arrays`) ([#45396])
#### Package Manager
* `Pkg.precompile` now accepts `timing` as a keyword argument which displays per package timing information for precompilation (e.g. `Pkg.precompile(timing=true)`)
#### LinearAlgebra
* `AbstractQ` no longer subtypes to `AbstractMatrix`. Moreover, `adjoint(Q::AbstractQ)`
no longer wraps `Q` in an `Adjoint` type, but instead in an `AdjointQ`, that itself
subtypes `AbstractQ`. This change accounts for the fact that typically `AbstractQ`
instances behave like function-based, matrix-backed linear operators, and hence don't
allow for efficient indexing. Also, many `AbstractQ` types can act on vectors/matrices
of different size, acting like a matrix with context-dependent size. With this change,
`AbstractQ` has a well-defined API that is described in detail in the
[Julia documentation](https://docs.julialang.org/en/v1/stdlib/LinearAlgebra/#man-linalg-abstractq)
([#46196]).
* Adjoints and transposes of `Factorization` objects are no longer wrapped in `Adjoint`
and `Transpose` wrappers, respectively. Instead, they are wrapped in
`AdjointFactorization` and `TranposeFactorization` types, which themselves subtype
`Factorization` ([#46874]).
* New functions `hermitianpart` and `hermitianpart!` for extracting the Hermitian
(real symmetric) part of a matrix ([#31836]).
* The `norm` of the adjoint or transpose of an `AbstractMatrix` now returns the norm of the
parent matrix by default, matching the current behaviour for `AbstractVector`s ([#49020]).
#### Printf
* Format specifiers now support dynamic width and precision, e.g. `%*s` and `%*.*g` ([#40105]).
#### Profile
#### Random
#### REPL
* When stack traces are printed, the printed depth of types in function signatures will be limited
to avoid overly verbose output ([#49795]).
#### SuiteSparse
#### SparseArrays
#### Test
* The `@test_broken` macro (or `@test` with `broken=true`) now complains if the test expression returns a
non-boolean value in the same way as a non-broken test. ([#47804])
* When a call to `@test` fails or errors inside a function, a larger stacktrace is now printed such that the location of the test within a `@testset` can be retrieved ([#49451])
#### Dates
#### Distributed
#### Unicode
#### DelimitedFiles
#### InteractiveUtils
* `code_native` and `@code_native` now default to intel syntax instead of AT&T.
* `@time_imports` now shows the timing of any module `__init__()`s that are run ([#49529])
Deprecated or removed
---------------------
External dependencies
---------------------
Tooling Improvements
--------------------
<!--- generated by NEWS-update.jl: -->
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...