Make allowscalar a macro with auto-world-age-increment (#583)

Goes along with JuliaLang/julia#56509

Author: Keno

src/abstractsparse.jl

@@ -184,6 +184,13 @@ else
     end
 end
 
+macro allowscalar(p)
+    quote
+        $(allowscalar)($(esc(p)))
+        @Core.latestworld
+    end
+end
+
 @inline _is_fixed(::AbstractArray) = false
 @inline _is_fixed(A::AbstractArray, Bs::Vararg{Any,N}) where N = _is_fixed(A) || (N > 0 && _is_fixed(Bs...))
 macro if_move_fixed(a...)

test/allowscalar.jl

@@ -4,20 +4,20 @@ using Test, SparseArrays
     A = sprandn(10, 20, 0.9)
     A[1, 1] = 2
     @test A[1, 1] == 2
-    SparseArrays.allowscalar(false)
+    SparseArrays.@allowscalar(false)
     @test_throws Any A[1, 1]
     @test_throws Any A[1, 1] = 2
-    SparseArrays.allowscalar(true)
+    SparseArrays.@allowscalar(true)
     @test A[1, 1] == 2
     A[1, 1] = 3
     @test A[1, 1] == 3
 
     B = sprandn(10, 0.9)
     B[1] = 2
     @test B[1] == 2
-    SparseArrays.allowscalar(false)
+    SparseArrays.@allowscalar(false)
     @test_throws Any B[1]
-    SparseArrays.allowscalar(true)
+    SparseArrays.@allowscalar(true)
     @test B[1] == 2
     B[1] = 3
     @test B[1] == 3