fix: setindex with scalars

Author: avik-pal

src/ConcreteRArray.jl

@@ -154,7 +154,7 @@ function Base.getindex(a::ConcreteRArray{T}, args::Vararg{Int,N}) where {T,N}
 end
 
 function mysetindex!(a, v, args::Vararg{Int,N}) where {N}
-    Base.setindex!(a, v, args...)
+    setindex!(a, v, args...)
     return nothing
 end
 

src/TracedRArray.jl

@@ -99,13 +99,17 @@ function Base.getindex(a::WrappedTracedRArray, indices...)
 end
 
 function Base.setindex!(
-    a::TracedRArray{T,N}, v, indices::Vararg{Union{Base.AbstractUnitRange,Colon},N}
+    a::TracedRArray{T,N}, v, indices::Vararg{Union{Base.AbstractUnitRange,Colon,Int},N}
 ) where {T,N}
+    indices = map(indices) do i
+        i isa Int ? (i:i) : (i isa Colon ? (1:size(a, i)) : i)
+    end
+    v = broadcast_to_size(v, length.(indices))
+    v = promote_to(TracedRArray{T,N}, v)
     indices = [
         (promote_to(TracedRNumber{Int}, i isa Colon ? 1 : first(i)) - 1).mlir_data for
         i in indices
     ]
-    v = promote_to(TracedRArray{T,N}, v)
     res = MLIR.IR.result(
         MLIR.Dialects.stablehlo.dynamic_update_slice(a.mlir_data, v.mlir_data, indices), 1
     )