(* Title: HOL/Library/Code_Char.thy
ID: $Id$
Author: Florian Haftmann
*)
header {* Code generation of pretty characters (and strings) *}
theory Code_Char
imports Plain List
begin
declare char.recs [code func del] char.cases [code func del]
lemma [code func]:
"size (c\<Colon>char) = 0"
by (cases c) simp
lemma [code func]:
"char_size (c\<Colon>char) = 0"
by (cases c) simp
code_type char
(SML "char")
(OCaml "char")
(Haskell "Char")
setup {*
let
val charr = @{const_name Char}
val nibbles = [@{const_name Nibble0}, @{const_name Nibble1},
@{const_name Nibble2}, @{const_name Nibble3},
@{const_name Nibble4}, @{const_name Nibble5},
@{const_name Nibble6}, @{const_name Nibble7},
@{const_name Nibble8}, @{const_name Nibble9},
@{const_name NibbleA}, @{const_name NibbleB},
@{const_name NibbleC}, @{const_name NibbleD},
@{const_name NibbleE}, @{const_name NibbleF}];
in
fold (fn target => CodeTarget.add_pretty_char target charr nibbles)
["SML", "OCaml", "Haskell"]
#> CodeTarget.add_pretty_list_string "Haskell"
@{const_name Nil} @{const_name Cons} charr nibbles
end
*}
code_instance char :: eq
(Haskell -)
code_reserved SML
char
code_reserved OCaml
char
code_const "op = \<Colon> char \<Rightarrow> char \<Rightarrow> bool"
(SML "!((_ : char) = _)")
(OCaml "!((_ : char) = _)")
(Haskell infixl 4 "==")
end