Fix macro hygiene issue with broadcast methods specialized for unary operations over SparseMatrixCSCs.

Author: Sacha0

base/sparse/sparsematrix.jl

@@ -1397,7 +1397,7 @@ such that `broadcast(::typeof(fc), A::SparseMatrixCSC) = fp(fc, A)`.
 macro _enumerate_childmethods(fp, fcs...)
     fcexps = Expr(:block)
     for fc in fcs
-        push!(fcexps.args, :( broadcast(::typeof($(esc(fc))), A::SparseMatrixCSC) = $(esc(fp))($(esc(fc)), A) ) )
+        push!(fcexps.args, :( $(esc(:broadcast))(::typeof($(esc(fc))), A::SparseMatrixCSC) = $(esc(fp))($(esc(fc)), A) ) )
     end
     return fcexps
 end

test/sparsedir/sparse.jl

@@ -1612,3 +1612,12 @@ end
 let A = sparse(UInt32[1,2,3], UInt32[1,2,3], [1.0,2.0,3.0])
     @test A[1,1:3] == A[1,:] == [1,0,0]
 end
+
+# Check that `broadcast` methods specialized for unary operations over
+# `SparseMatrixCSC`s are called. (Issue # .)
+let
+    A = spdiagm(1.0:5.0)
+    @test isa(sin.(A), SparseMatrixCSC) # representative for _unary_nz2z_z2z class
+    @test isa(abs.(A), SparseMatrixCSC) # representative for _unary_nz2nz_z2z class
+    @test isa(exp.(A), Array) # representative for _unary_nz2nz_z2nz class
+end