From 790de19f73f1c164aba2259a6fe3f1a50eeff70c Mon Sep 17 00:00:00 2001
From: Alasdair Armstrong
Date: Wed, 27 Mar 2019 16:21:05 +0000
Subject: Interactive: Refactor sail.ml

Rather than having a separate variable for each backend X,
opt_print_X, just have a single variable opt_print_target, where
target contains a string option, such as `Some "lem"` or `Some
"ocaml"`, then we have a function target that takes that string and
invokes the appropriate backend, so the main function in sail.ml goes
from being a giant if-then-else block to a single call to

target !opt_target ast env

This allows us to implement a :compile <target> command in the
interactive toplevel

Also implement a :rewrites <target> command which performs all the
rewrites for a specific target, so rather than doing e.g.

> sail -c -O -o out $FILES

one could instead interactively do

> sail -i
:option -undefined_gen
:load $FILES
:option -O
:option -o out
:rewrites c
:compile c
:quit

for the same result.

To support this the behavior of the interactive mode has changed
slightly. It no longer performs any rewrites at all, so a :rewrites
interpreter is currently needed to interpret functions in the
interactive toplevel, nor does it automatically set any other flags,
so -undefined_gen is needed in this case, which is usually implied by
the -c flag.
---
 src/process_file.ml | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

(limited to 'src/process_file.ml')

diff --git a/src/process_file.ml b/src/process_file.ml
index e7bf8d30..c6d900b4 100644
--- a/src/process_file.ml
+++ b/src/process_file.ml
@@ -402,14 +402,8 @@ let rewrite env rewriters defs =
   | Type_check.Type_error (_, l, err) ->
      raise (Reporting.err_typ l (Type_error.string_of_type_error err))
 
-let rewrite_ast env = rewrite env [("initial", fun _ -> Rewriter.rewrite_defs)]
-let rewrite_ast_lem env = rewrite env Rewrites.rewrite_defs_lem
-let rewrite_ast_coq env = rewrite env Rewrites.rewrite_defs_coq
-let rewrite_ast_ocaml env = rewrite env Rewrites.rewrite_defs_ocaml
-let rewrite_ast_c env ast =
-  ast
-  |> rewrite env Rewrites.rewrite_defs_c
-  |> rewrite env [("constant_fold", fun _ -> Constant_fold.rewrite_constant_function_calls)]
-
-let rewrite_ast_interpreter env = rewrite env Rewrites.rewrite_defs_interpreter
+let rewrite_ast_initial env = rewrite env [("initial", fun _ -> Rewriter.rewrite_defs)]
+
+let rewrite_ast_target tgt env = rewrite env (Rewrites.rewrite_defs_target tgt)
+
 let rewrite_ast_check env = rewrite env Rewrites.rewrite_defs_check
-- 
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