(* Title: HOL/ex/Antiquote.thy
ID: $Id$
Author: Markus Wenzel, TU Muenchen
License: GPL (GNU GENERAL PUBLIC LICENSE)
Simple quote / antiquote example.
*)
theory Antiquote = Main:
syntax
"_Expr" :: "'a => 'a" ("EXPR _" [1000] 999)
constdefs
var :: "'a => ('a => nat) => nat" ("VAR _" [1000] 999)
"var x env == env x"
Expr :: "(('a => nat) => nat) => ('a => nat) => nat"
"Expr exp env == exp env"
parse_translation {* [Syntax.quote_antiquote_tr "_Expr" "var" "Expr"] *}
print_translation {* [Syntax.quote_antiquote_tr' "_Expr" "var" "Expr"] *}
term "EXPR (a + b + c)"
term "EXPR (a + b + c + VAR x + VAR y + 1)"
term "EXPR (VAR (f w) + VAR x)"
term "Expr (%env. env x)" (*improper*)
term "Expr (%env. f env)"
term "Expr (%env. f env + env x)" (*improper*)
term "Expr (%env. f env y z)"
term "Expr (%env. f env + g y env)"
term "Expr (%env. f env + g env y + h a env z)"
end