transferred isapprox for chakravala/Leibniz.jl#2

Author: chakravala

Project.toml

@@ -1,7 +1,7 @@
 name = "DirectSum"
 uuid = "22fd7b30-a8c0-5bf2-aabe-97783860d07c"
 authors = ["Michael Reed"]
-version = "0.7.4"
+version = "0.7.5"
 
 [deps]
 ComputedFieldTypes = "459fdd68-db75-56b8-8c15-d717a790f88e"

src/DirectSum.jl

@@ -390,6 +390,13 @@ end
 
 Base.:(==)(a::TensorTerm{V,G},b::TensorTerm{V,G}) where {V,G} = basis(a) == basis(b) ? value(a) == value(b) : 0 == value(a) == value(b)
 
+for T ∈ (Fields...,Symbol,Expr)
+    @eval begin
+        Base.isapprox(a::S,b::T) where {S<:TensorAlgebra,T<:$T} = Base.isapprox(a,Simplex{Manifold(a)}(b))
+        Base.isapprox(a::S,b::T) where {S<:$T,T<:TensorAlgebra} = Base.isapprox(b,a)
+    end
+end
+
 for Field ∈ Fields
     TF = Field ∉ Fields ? :Any : :T
     EF = Field ≠ Any ? Field : ExprField