structure PolyML is sealed after bootstrap: all ML system access is managed by Isabelle;
(* Title: Tools/Code_Generator.thy
Author: Florian Haftmann, TU Muenchen
*)
section \<open>Loading the code generator and related modules\<close>
theory Code_Generator
imports Pure
keywords
"print_codeproc" "code_thms" "code_deps" :: diag and
"export_code" "code_identifier" "code_printing" "code_reserved"
"code_monad" "code_reflect" :: thy_decl and
"datatypes" "functions" "module_name" "file" "checking"
"constant" "type_constructor" "type_class" "class_relation" "class_instance" "code_module"
begin
ML_file "~~/src/Tools/cache_io.ML"
ML_file "~~/src/Tools/Code/code_preproc.ML"
ML_file "~~/src/Tools/Code/code_symbol.ML"
ML_file "~~/src/Tools/Code/code_thingol.ML"
ML_file "~~/src/Tools/Code/code_simp.ML"
ML_file "~~/src/Tools/Code/code_printer.ML"
ML_file "~~/src/Tools/Code/code_target.ML"
ML_file "~~/src/Tools/Code/code_namespace.ML"
ML_file "~~/src/Tools/Code/code_ml.ML"
ML_file "~~/src/Tools/Code/code_haskell.ML"
ML_file "~~/src/Tools/Code/code_scala.ML"
code_datatype "TYPE('a::{})"
definition holds :: "prop" where
"holds \<equiv> ((\<lambda>x::prop. x) \<equiv> (\<lambda>x. x))"
lemma holds: "PROP holds"
by (unfold holds_def) (rule reflexive)
code_datatype holds
lemma implies_code [code]:
"(PROP holds \<Longrightarrow> PROP P) \<equiv> PROP P"
"(PROP P \<Longrightarrow> PROP holds) \<equiv> PROP holds"
proof -
show "(PROP holds \<Longrightarrow> PROP P) \<equiv> PROP P"
proof
assume "PROP holds \<Longrightarrow> PROP P"
then show "PROP P" using holds .
next
assume "PROP P"
then show "PROP P" .
qed
next
show "(PROP P \<Longrightarrow> PROP holds) \<equiv> PROP holds"
by rule (rule holds)+
qed
ML_file "~~/src/Tools/Code/code_runtime.ML"
ML_file "~~/src/Tools/nbe.ML"
hide_const (open) holds
end