Benjamin_Loison/Synchronous_reactive_systems
1
0
Fork 0
Code Issues 7 Pull Requests Packages Projects Releases Wiki Activity

Add support for returning multiple variables but generate C errors, as we keep returning variables for void functions

Browse Source
This commit is contained in:
Benjamin Loison 2022-12-16 03:03:12 +01:00
parent 621658e177
commit 78e096d2f4
1 changed files with 27 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
src/ast_to_c.ml
View File

@ -84,6 +84,8 @@ let rec pp_asnprevarlist node_name fmt : t_varlist -> unit = function
let reset_expressions_counter = ref 0;;
let outputs = ref [];;
let pp_expression node_name =
let rec pp_expression_aux fmt expression =
let rec pp_expression_list fmt exprs =
@ -189,8 +191,13 @@ let pp_expression node_name =
let rec pp_equations node_name fmt: t_eqlist -> unit = function
| [] -> ()
| ((l_types, vars), (EApp (r_types, node, exprs))) :: eqs when l_types <> [] -> Format.fprintf fmt "%a" (pp_equations node_name) ((([], []), (EApp (r_types, node, exprs))) :: eqs)
| (([], []), (ETuple ([], []))) :: eqs -> Format.fprintf fmt "%a" (pp_equations node_name) eqs
| ((l_type :: l_types, var :: vars), (ETuple (r_type :: r_types, expr :: exprs))) :: eqs -> Format.fprintf fmt "%a" (pp_equations node_name) ((([l_type], [var]), expr) :: ((l_types, vars), (ETuple (r_types, exprs))) :: eqs)
| (([], []), expr) :: eqs ->
Format.fprintf fmt "\t%a;\n%a"
(pp_expression node_name) expr
(pp_equations node_name) eqs
| (patt, expr) :: eqs ->
Format.fprintf fmt "\t%a = %a;\n%a"
(pp_varlist Base) patt
@ -212,19 +219,19 @@ let pp_node fmt node =
reset_expressions_counter := 0;
let _ = (pp_equations node.n_name) Format.str_formatter node.n_equations in
reset_expressions_counter := 0;
Format.fprintf fmt "bool init_%s = true;\n\n%a\n\n%a\n\n%a\n\n%s\n\n%a %s(%a)\n{\n\t%a\n\n\t%a\n\n%a\n\tinit_%s = false;\n\n%a\n\n%a\n\n%a\n\n\treturn %a;\n}\n"
(* could remove the `return` for functions other than the `main` one *)
Format.fprintf fmt "bool init_%s = true;\n\n%a\n\n%a\n\n%a\n\n%s\n\n%s %s(%a)\n{\n\t%a\n\n%a\n\n\tinit_%s = false;\n\n%a\n\n%a\n\n%a\n\n\treturn %a;\n}\n"
node.n_name
(* could avoid declaring unused variables *)
(pp_prevarlist node.n_name) node.n_inputs
(pp_prevarlist node.n_name) node.n_local_vars
(pp_prevarlist node.n_name) node.n_outputs
(pp_resvars !reset_expressions_counter)
pp_retvarlist node.n_outputs
(if node.n_name = "main" then "int" else "void")
node.n_name
(* could avoid newlines if they aren't used to seperate statements *)
(pp_varlist Arg) node.n_inputs
(pp_varlist Dec) node.n_local_vars
(pp_varlist Dec) node.n_outputs
(pp_equations node.n_name) node.n_equations
node.n_name
(pp_asnprevarlist node.n_name) node.n_inputs
@ -238,9 +245,24 @@ let rec pp_nodes fmt nodes =
| node :: nodes ->
Format.fprintf fmt "%a\n%a" pp_node node pp_nodes nodes
let rec load_outputs_from_vars n_outputs =
match n_outputs with
| [] -> ()
| BVar n_output :: n_outputs
| IVar n_output :: n_outputs
| RVar n_output :: n_outputs ->
(if (not (List.mem n_output !outputs)) then outputs := n_output :: !outputs;); load_outputs_from_vars n_outputs
let rec load_outputs_from_nodes nodes =
match nodes with
| [] -> ()
| node :: nodes ->
(load_outputs_from_vars (snd node.n_outputs)); load_outputs_from_nodes nodes
let ast_to_c fmt prog =
load_outputs_from_nodes prog;
Format.fprintf fmt
(* could verify that uses, possibly indirectly (cf `->` implementation), a boolean in the ast before including `<stdbool.h>` *)
"#include <stdbool.h>\n\n%a"
pp_nodes prog
"#include <stdbool.h>\n\n%s\n\n%a"
("float " ^ (String.concat ", " !outputs) ^ ";") pp_nodes prog