Added elementwise version of => to prec-pair (#27447)

* Added  elementwise version of => to prec-pair

* Added test for broadcasting pair operator

* Update broadcast.jl

* Update broadcast.jl

* Delete whitespace

* Added NEWS entry on broadcasting pair operator

* Fixed spruious deletion in NEWS.md

NEWS.md

@@ -47,6 +47,8 @@ New language features
  * Keyword arguments can be required: if a default value is omitted, then an
  exception is thrown if the caller does not assign the keyword a value ([#25830]).
 
+ * The pair operator `=>` is now broadcastable as `.=>` which was previously a parsing error ([#27447])
+
 Language changes
 ----------------
 

src/julia-parser.scm

@@ -10,7 +10,7 @@
  (append! (add-dots '(= += -= *= /= //= |\\=| ^= ÷= %= <<= >>= >>>= |\|=| &= ⊻= ≔ ⩴ ≕))
  '(:= ~ $=)))
 ;; comma - higher than assignment outside parentheses, lower when inside
-(define prec-pair '(=>))
+(define prec-pair (add-dots '(=>)))
 (define prec-conditional '(?))
 (define prec-arrow (append!
  '(-- -->)

test/broadcast.jl

@@ -727,6 +727,13 @@ let f(args...) = *(args...)
  @test f.(x..., f.(x..., y, z...), y, z...) == broadcast(f, x..., broadcast(f, x..., y, z...), y, z...) == 120*120
 end
 
+# Issue #27446: Broadcasting pair operator
+let
+ c = ["foo", "bar"]
+ d = [1,2]
+ @test Dict(c .=> d) == Dict("foo" => 1, "bar" => 2)
+end
+
 # Broadcasted iterable/indexable APIs
 let
  bc = Broadcast.instantiate(Broadcast.broadcasted(+, zeros(5), 5))