X-Git-Url: http://git.megacz.com/?p=coq-hetmet.git;a=blobdiff_plain;f=src%2FHaskCoreVars.v;h=954dfc5f8022443b263e59e98d869c6c7c18ea3c;hp=6e611282b5e7ebe6910416459061335071c06e07;hb=8c26722a1ee110077968a8a166eb7130266b2035;hpb=b8f6adf700fa3c67feefaea3d2cf5c4626300489

diff --git a/src/HaskCoreVars.v b/src/HaskCoreVars.v
index 6e61128..954dfc5 100644
--- a/src/HaskCoreVars.v
+++ b/src/HaskCoreVars.v
@@ -5,10 +5,13 @@
 Generalizable All Variables.
 Require Import Preamble.
 Require Import General.
+Require Import Coq.Strings.String.
 
 (* GHC uses a single type for expression variables, type variables, and coercion variables; this is that type *)
 Variable CoreVar          : Type.                                               Extract Inlined Constant CoreVar    => "Var.Var".
 Variable coreVar_eq       : forall (a b:CoreVar), sumbool (a=b) (not (a=b)).    Extract Inlined Constant coreVar_eq => "(==)".
+Variable coreVarToString  : CoreVar      -> string.  Extract Inlined Constant coreVarToString         => "outputableToString".
 Axiom    coreVar_eq_refl  : forall v, (coreVar_eq v v) = (left _ (refl_equal v)).
 Instance CoreVarEqDecidable : EqDecidable CoreVar := { eqd_dec            := coreVar_eq }.
-
+Instance CoreVarToString : ToString CoreVar :=
+  { toString := coreVarToString }.