@kwdef: export and add to public api (#46273)

Author: IanButterworth

NEWS.md

@@ -87,6 +87,7 @@ Library changes
 * `@time` now separates out % time spent recompiling invalidated methods ([#45015]).
 * `eachslice` now works over multiple dimensions; `eachslice`, `eachrow` and `eachcol` return
   a `Slices` object, which allows dispatching to provide more efficient methods ([#32310]).
+* `@kwdef` is now exported and added to the public API ([#46273])
 
 Standard library changes
 ------------------------

base/exports.jl

@@ -772,6 +772,7 @@ export
 # syntax
     esc,
     gensym,
+    @kwdef,
     macroexpand,
     @macroexpand1,
     @macroexpand,

base/util.jl

@@ -507,9 +507,12 @@ order to function correctly with the keyword outer constructor.
     `Base.@kwdef` for parametric structs, and structs with supertypes
     requires at least Julia 1.1.
 
+!!! compat "Julia 1.9"
+    This macro is exported as of Julia 1.9.
+
 # Examples
 ```jldoctest
-julia> Base.@kwdef struct Foo
+julia> @kwdef struct Foo
            a::Int = 1         # specified default
            b::String          # required keyword
        end

doc/src/base/base.md

@@ -88,6 +88,7 @@ outer
 const
 struct
 mutable struct
+@kwdef
 abstract type
 primitive type
 where