Execution.fork formally requires registered Execution.running;
Thy_Info.load_thy: more official exec_id registration (batch mode);
dummy exec Document_ID.none is always registered (TTY mode);
clarified exceptions for module Execution (NB: fork is used in user space, unlike protocol operations of Command and Document);
(* Author: Florian Haftmann, TU Muenchen *)
header {* Debugging facilities for code generated towards Isabelle/ML *}
theory Debug
imports Main
begin
definition trace :: "String.literal \<Rightarrow> unit" where
[simp]: "trace s = ()"
definition tracing :: "String.literal \<Rightarrow> 'a \<Rightarrow> 'a" where
[simp]: "tracing s = id"
lemma [code]:
"tracing s = (let u = trace s in id)"
by simp
definition flush :: "'a \<Rightarrow> unit" where
[simp]: "flush x = ()"
definition flushing :: "'a \<Rightarrow> 'b \<Rightarrow> 'b" where
[simp]: "flushing x = id"
lemma [code, code_unfold]:
"flushing x = (let u = flush x in id)"
by simp
definition timing :: "String.literal \<Rightarrow> ('a \<Rightarrow> 'b) \<Rightarrow> 'a \<Rightarrow> 'b" where
[simp]: "timing s f x = f x"
code_printing
constant trace \<rightharpoonup> (Eval) "Output.tracing"
| constant flush \<rightharpoonup> (Eval) "Output.tracing/ (@{make'_string} _)" -- {* note indirection via antiquotation *}
| constant timing \<rightharpoonup> (Eval) "Timing.timeap'_msg"
code_reserved Eval Output Timing
hide_const (open) trace tracing flush flushing timing
end