Update for isrealdomain and \ deprecation (#684)

Author: jishnub

Project.toml

@@ -1,6 +1,6 @@
 name = "ApproxFunBase"
 uuid = "fbd15aa5-315a-5a7d-a8a4-24992e37be05"
-version = "0.9.34"
+version = "0.9.35"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"

src/ApproxFunBase.jl

@@ -24,6 +24,9 @@ import Statistics: mean
 @static if !isdefined(DomainSets, :cartesianproduct)
     const cartesianproduct = ×
 end
+@static if !isdefined(DomainSets, :isrealdomain)
+    const isrealdomain = isreal
+end
 
 import DomainSets: Domain, indomain, UnionDomain, ProductDomain, Point, ∂,
               SetdiffDomain, Interval, ChebyshevInterval, boundary,

src/Domains/Domains.jl

@@ -70,7 +70,7 @@ function _affine_setdiff(d::Domain, pts)
     filter!(p->p ∈ d,pts)
 
     isempty(pts) && return d
-    length(pts) == 1 && return d \ pts[1]
+    length(pts) == 1 && return d \ DomainRef(pts[1])
 
     ret = Array{Domain}(undef, length(pts)+1)
     ret[1] = Domain(leftendpoint(d) .. pts[1])

src/Operators/banded/CalculusOperator.jl

@@ -163,7 +163,7 @@ function linesum(f::Fun)
     cd=canonicaldomain(f)
     d=domain(f)
 
-    if isreal(d)
+    if isrealdomain(d)
         a,b=leftendpoint(d),rightendpoint(d)
         sign(last(b)-first(a))*sum(f)
     elseif typeof(cd)==typeof(d)  || isperiodic(d)