Use TDNR in Functor

proposal/macros.tex

@@ -5,6 +5,7 @@
 \newcommand{\defeq}{\coloneqq}
 \newcommand{\bN}{\mathbb{N}}
 \newcommand{\bC}{\mathbb{C}}
+\newcommand{\bX}{\mathbb{X}}
 \newcommand{\to}{\rightarrow}}
 \newcommand{\mto}{\mapsto}}
 \newcommand{\UU}{\ensuremath{\mathcal{U}}\xspace}

src/Cat/Functor.agda

@@ -8,9 +8,7 @@ open import Cat.Category
 
 record Functor {ℓc ℓc' ℓd ℓd'} (C : Category ℓc ℓc') (D : Category ℓd ℓd')
   : Set (ℓc ⊔ ℓc' ⊔ ℓd ⊔ ℓd') where
-  private
-    open module C = Category C
-    open module D = Category D
+  open Category
   field
     func* : C .Object → D .Object
     func→ : {dom cod : C .Object} → C .Arrow dom cod → D .Arrow (func* dom) (func* cod)
@@ -19,7 +17,7 @@ record Functor {ℓc ℓc' ℓd ℓd'} (C : Category ℓc ℓc') (D : Category
     -- This guy managed to do it:
     --    https://github.com/copumpkin/categories/blob/master/Categories/Functor/Core.agda
     distrib : { c c' c'' : C .Object} {a : C .Arrow c c'} {a' : C .Arrow c' c''}
-      → func→ (a' C.⊕ a) ≡ func→ a' D.⊕ func→ a
+      → func→ (C ._⊕_ a' a) ≡ D ._⊕_ (func→ a') (func→ a)
 
 module _ {ℓ ℓ' : Level} {A B C : Category ℓ ℓ'} (F : Functor B C) (G : Functor A B) where
   open Functor