doc-src/Codegen/Thy/examples/Codegen.hs
author haftmann
Thu, 23 Sep 2010 13:23:22 +0200
changeset 39661 6381d18507ef
parent 30226 2f4684e2ea95
permissions -rw-r--r--
reverted cs 07549694e2f1 -- use re-printing with current print mode instead after code assembly, avoid Latex.output_typewriter

module Codegen where {

import qualified Nat;

class Null a where {
  nulla :: a;
};

heada :: forall a. (Codegen.Null a) => [a] -> a;
heada (x : xs) = x;
heada [] = Codegen.nulla;

null_option :: forall a. Maybe a;
null_option = Nothing;

instance Codegen.Null (Maybe a) where {
  nulla = Codegen.null_option;
};

dummy :: Maybe Nat.Nat;
dummy = Codegen.heada [Just (Nat.Suc Nat.Zero_nat), Nothing];

}