Merge pull request #25 from JuliaAlgebra/revert-#14

Revert #14 for Julia 0.6

Author: blegat

src/mono.jl

@@ -28,8 +28,11 @@ function Monomial{C}(α) where C
     α == 1 || error("Cannot convert $α to a Monomial{$C} as it is not one")
     Monomial{C}(PolyVar{C}[], Int[])
 end
-# defaults to commutative so that `Monomial(1)` is consistent with TypedPolynomials
-Monomial(α) = Monomial{true}(α)
+
+@static if VERSION ≥ v"0.7-"
+    # defaults to commutative so that `Monomial(1)` is consistent with TypedPolynomials
+    Monomial(α::Number) = Monomial{true}(α)
+end
 
 Base.copy(m::M) where {M<:Monomial} = M(m.vars, copy(m.z))
 

test/mono.jl

@@ -25,15 +25,17 @@
         @test zeroterm(Monomial{false}) == 0
         @test zero(Monomial{false}) == 0
         @test one(Monomial{true}) == 1
-        @test_throws ErrorException Monomial(2)
-        @test (@inferred Monomial(1)) isa Monomial{true}
-        @test Monomial(1) == 1
-        @test_throws ErrorException Monomial{true}(2)
-        @test (@inferred Monomial{true}(1)) isa Monomial{true}
-        @test Monomial{true}(1) == 1
-        @test_throws ErrorException Monomial{false}(2)
-        @test (@inferred Monomial{false}(1)) isa Monomial{false}
-        @test Monomial{false}(1) == 1
+        if VERSION ≥ v"0.7-"
+            @test_throws ErrorException Monomial(2)
+            @test (@inferred Monomial(1)) isa Monomial{true}
+            @test Monomial(1) == 1
+            @test_throws ErrorException Monomial{true}(2)
+            @test (@inferred Monomial{true}(1)) isa Monomial{true}
+            @test Monomial{true}(1) == 1
+            @test_throws ErrorException Monomial{false}(2)
+            @test (@inferred Monomial{false}(1)) isa Monomial{false}
+            @test Monomial{false}(1) == 1
+        end
         @polyvar x
         @test_throws ArgumentError Monomial{true}([x], [1,0])
         @test zeroterm(x^2) isa Term{true, Int}