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Added some interfaces and removed submodules [Error].

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This commit is contained in:
Christian Rinderknecht 2020-03-24 21:05:39 +01:00
parent 9b6b13cda3
commit ab79fe4eda
7 changed files with 215 additions and 159 deletions
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20
vendors/Preproc/E_Lexer.mli vendored Normal file
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@ -0,0 +1,20 @@
(* Module for lexing boolean expressions of conditional directives *)
(* Regions *)
module Region = Simple_utils.Region
val string_of_token : E_Parser.token -> string
(* Errors *)
type error = Invalid_character of char
val format :
?offsets:bool -> error Region.reg -> file:bool -> string Region.reg
(* Lexing boolean expressions (may raise [Error]) *)
exception Error of error Region.reg
val scan : Lexing.lexbuf -> E_Parser.token

13
vendors/Preproc/E_Lexer.mll vendored
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@ -27,22 +27,19 @@ let string_of_token = function
(* Errors *)
module Error =
struct
type t = Invalid_character of char
type error = Invalid_character of char
let to_string = function
let error_to_string = function
Invalid_character c ->
sprintf "Invalid character '%c' (%d).\n" c (Char.code c)
let format ?(offsets=true) Region.{region; value} ~file =
let msg = to_string value
let msg = error_to_string value
and reg = region#to_string ~file ~offsets `Byte in
let value = sprintf "Preprocessing error %s:\n%s" reg msg
in Region.{value; region}
end
exception Error of Error.t Region.reg
exception Error of error Region.reg
let mk_reg buffer =
let start = Lexing.lexeme_start_p buffer |> Pos.from_byte
@ -95,7 +92,7 @@ rule scan = parse
| "!=" { NEQ }
| "!" { NOT }
| "//" { inline_com lexbuf }
| _ as c { fail (Error.Invalid_character c) lexbuf }
| _ as c { fail (Invalid_character c) lexbuf }
and inline_com = parse
newline { Lexing.new_line lexbuf; EOL }

4
vendors/Preproc/E_LexerMain.ml vendored
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@ -5,7 +5,7 @@ let highlight msg = Printf.eprintf "\027[31m%s\027[0m%!" msg
let options = EvalOpt.read ();;
match open_in options#input with
exception Sys_error msg -> prerr_endline msg
exception Sys_error msg -> highlight msg
| cin ->
let buffer = Lexing.from_channel cin in
let open Lexing in
@ -18,6 +18,6 @@ match open_in options#input with
if token <> E_Parser.EOL then iter ()
| exception E_Lexer.Error err ->
let formatted =
E_Lexer.Error.format ~offsets:options#offsets ~file:true err
E_Lexer.format ~offsets:options#offsets ~file:true err
in highlight formatted.Region.value
in iter (); close_in cin

8
vendors/Preproc/E_ParserMain.ml vendored
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@ -5,7 +5,7 @@ let highlight msg = Printf.eprintf "\027[31m%s\027[0m%!" msg
let options = EvalOpt.read ();;
match open_in options#input with
exception Sys_error msg -> prerr_endline msg
exception Sys_error msg -> highlight msg
| cin ->
let buffer = Lexing.from_channel cin in
let open Lexing in
@ -20,15 +20,15 @@ match open_in options#input with
with
E_Lexer.Error error ->
let formatted =
E_Lexer.Error.format
E_Lexer.format
~offsets:options#offsets ~file:true error
in highlight formatted.Region.value
| E_Parser.Error ->
let region = Preproc.mk_reg buffer
and value = Preproc.Error.Parse_error in
and value = Preproc.Parse_error in
let error = Region.{value; region} in
let formatted =
Preproc.Error.format ~offsets:options#offsets
Preproc.format ~offsets:options#offsets
~file:true error
in highlight formatted.Region.value
in close_in cin

50
vendors/Preproc/Preproc.mli vendored Normal file
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@ -0,0 +1,50 @@
(* The main module of the preprocessor (see [lex]) *)
(* Regions *)
module Region = Simple_utils.Region
val mk_reg : Lexing.lexbuf -> Region.t
(* Errors *)
type error =
Invalid_directive of string
| Directive_inside_line
| Missing_endif
| Invalid_line_indicator of string
| No_line_indicator
| End_line_indicator
| Newline_in_string
| Open_comment
| Open_string
| Dangling_endif
| Open_region_in_conditional
| Dangling_endregion
| Conditional_in_region
| If_follows_elif
| Else_follows_else
| Dangling_else
| Elif_follows_else
| Dangling_elif
| Reserved_symbol of string
| Multiply_defined_symbol of string
| Error_directive of string
| Parse_error
| No_line_comment_or_blank
| Invalid_symbol
val format :
?offsets:bool -> error Region.reg -> file:bool -> string Region.reg
(* Preprocessing a lexing buffer (might raise [Error]). *)
exception Error of Buffer.t * error Region.reg
val lex : Lexing.lexbuf -> Buffer.t
(* Evaluation of boolean expressions *)
module Env : Set.S with type elt = string
val eval : Env.t -> E_AST.t -> bool

77
vendors/Preproc/Preproc.mll vendored
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@ -22,16 +22,6 @@ let sprintf = Printf.sprintf
| char::l -> Bytes.set bytes i char; fill (i-1) l
in fill (len-1) p |> Bytes.to_string
(* The call [explode s a] is the list made by pushing the characters
in the string [s] on top of [a], in reverse order. For example,
[explode "ba" ['c';'d'] = ['a'; 'b'; 'c'; 'd']]. *)
let explode s acc =
let rec push = function
0 -> acc
| i -> s.[i-1] :: push (i-1)
in push (String.length s)
(* The type [mode] defines the two scanning modes of the preprocessor:
either we copy the current characters or we skip them. *)
@ -88,9 +78,7 @@ type state = {
(* ERRORS *)
module Error =
struct
type t =
type error =
Invalid_directive of string
| Directive_inside_line
| Missing_endif
@ -116,7 +104,7 @@ module Error =
| No_line_comment_or_blank
| Invalid_symbol
let to_string = function
let error_to_string = function
Invalid_directive name ->
sprintf "Invalid directive \"%s\"." name
| Directive_inside_line ->
@ -177,20 +165,19 @@ module Error =
"Expected a symbol (identifier)."
let format ?(offsets=true) Region.{region; value} ~file =
let msg = to_string value
let msg = error_to_string value
and reg = region#to_string ~file ~offsets `Byte in
let value = sprintf "Preprocessing error %s:\n%s" reg msg
in Region.{value; region}
end
exception Error of state * Error.t Region.reg
exception Error of Buffer.t * error Region.reg
let mk_reg buffer =
let start = Lexing.lexeme_start_p buffer |> Pos.from_byte
and stop = Lexing.lexeme_end_p buffer |> Pos.from_byte
in Region.make ~start ~stop
let stop value state region = raise (Error (state, Region.{region; value}))
let stop value state region = raise (Error (state.out, Region.{region; value}))
let fail error state buffer = stop error state (mk_reg buffer)
(* The function [reduce_cond] is called when a #endif directive is
@ -198,9 +185,9 @@ let fail error state buffer = stop error state (mk_reg buffer)
let reduce_cond state region =
let rec reduce = function
[] -> stop Error.Dangling_endif state region
[] -> stop Dangling_endif state region
| If mode::trace -> trace, mode
| Region::_ -> stop Error.Open_region_in_conditional state region
| Region::_ -> stop Open_region_in_conditional state region
| _::trace -> reduce trace
in reduce state.trace
@ -209,9 +196,9 @@ let reduce_cond state region =
let reduce_reg state region =
match state.trace with
[] -> stop Error.Dangling_endregion state region
[] -> stop Dangling_endregion state region
| Region::trace -> trace
| _ -> stop Error.Conditional_in_region state region
| _ -> stop Conditional_in_region state region
(* The function [extend] is called when encountering conditional
directives #if, #else and #elif. As its name suggests, it extends
@ -220,11 +207,11 @@ let reduce_reg state region =
let extend cond state region =
match cond, state.trace with
If _, Elif _::_ -> stop Error.If_follows_elif state region
| Else, Else::_ -> stop Error.Else_follows_else state region
| Else, [] -> stop Error.Dangling_else state region
| Elif _, Else::_ -> stop Error.Elif_follows_else state region
| Elif _, [] -> stop Error.Dangling_elif state region
If _, Elif _::_ -> stop If_follows_elif state region
| Else, Else::_ -> stop Else_follows_else state region
| Else, [] -> stop Dangling_else state region
| Elif _, Else::_ -> stop Elif_follows_else state region
| Elif _, [] -> stop Dangling_elif state region
| hd, tl -> hd::tl
(* The function [last_mode] seeks the last mode as recorded in the
@ -272,8 +259,8 @@ let expr state buffer : mode =
try E_Parser.expr E_Lexer.scan buffer with
E_Parser.Error ->
let region = mk_reg buffer in
let value = Error.Parse_error
in raise (Error (state, Region.{value; region})) in
let value = Parse_error
in raise (Error (state.out, Region.{value; region})) in
let () = print state "\n" in
if eval state.env ast then Copy else Skip
@ -428,9 +415,9 @@ rule scan state = parse
| Inline -> copy state lexbuf; scan state lexbuf }
| directive {
if not (List.mem id directives)
then fail (Error.Invalid_directive id) state lexbuf;
then fail (Invalid_directive id) state lexbuf;
if state.offset = Inline
then fail Error.Directive_inside_line state lexbuf;
then fail Directive_inside_line state lexbuf;
let region = mk_reg lexbuf in
match id with
"include" ->
@ -473,9 +460,9 @@ rule scan state = parse
| "define" ->
let id, region = variable state lexbuf in
if id="true" || id="false"
then stop (Error.Reserved_symbol id) state region;
then stop (Reserved_symbol id) state region;
if Env.mem id state.env
then stop (Error.Multiply_defined_symbol id) state region;
then stop (Multiply_defined_symbol id) state region;
let state = {state with env = Env.add id state.env;
offset = Prefix 0}
in scan state lexbuf
@ -485,7 +472,7 @@ rule scan state = parse
offset = Prefix 0}
in scan state lexbuf
| "error" ->
stop (Error.Error_directive (message [] lexbuf)) state region
stop (Error_directive (message [] lexbuf)) state region
(*
| "warning" ->
let start_p, end_p = region in
@ -523,7 +510,7 @@ rule scan state = parse
}
| eof { match state.trace with
[] -> expand_offset state; state
| _ -> fail Error.Missing_endif state lexbuf }
| _ -> fail Missing_endif state lexbuf }
| '"' { if state.mode = Copy then
begin
expand_offset state;
@ -560,7 +547,7 @@ and variable state = parse
and symbol state = parse
ident as id { id, mk_reg lexbuf }
| _ { fail Error.Invalid_symbol state lexbuf }
| _ { fail Invalid_symbol state lexbuf }
(* Line indicator (#line) *)
@ -574,8 +561,8 @@ and line_indicator state = parse
match id with
"default" | "hidden" ->
print state (id ^ message [] lexbuf)
| _ -> fail (Error.Invalid_line_indicator id) state lexbuf }
| _ { fail Error.No_line_indicator state lexbuf }
| _ -> fail (Invalid_line_indicator id) state lexbuf }
| _ { fail No_line_indicator state lexbuf }
and end_indicator state = parse
blank+ { copy state lexbuf; end_indicator state lexbuf }
@ -586,7 +573,7 @@ and end_indicator state = parse
| '"' { copy state lexbuf;
in_string (mk_reg lexbuf) state lexbuf;
opt_line_com state lexbuf }
| _ { fail Error.End_line_indicator state lexbuf }
| _ { fail End_line_indicator state lexbuf }
and opt_line_com state = parse
nl { proc_nl state lexbuf }
@ -600,7 +587,7 @@ and skip_line state = parse
nl { proc_nl state lexbuf }
| blank+ { skip_line state lexbuf }
| "//" { in_line_com {state with mode=Skip} lexbuf }
| _ { fail Error.No_line_comment_or_blank state lexbuf }
| _ { fail No_line_comment_or_blank state lexbuf }
| eof { () }
and message acc = parse
@ -620,7 +607,7 @@ and in_line_com state = parse
and in_block_com opening state = parse
nl { proc_nl state lexbuf; in_block_com opening state lexbuf }
| "*/" { copy state lexbuf }
| eof { stop Error.Open_comment state opening }
| eof { stop Open_comment state opening }
| _ { copy state lexbuf; in_block_com opening state lexbuf }
(* Include a file *)
@ -637,8 +624,8 @@ and scan_inclusion state = parse
and in_inclusion opening acc len state = parse
'"' { mk_str len acc }
| nl { fail Error.Newline_in_string state lexbuf }
| eof { stop Error.Open_string state opening }
| nl { fail Newline_in_string state lexbuf }
| eof { stop Open_string state opening }
| _ as c { in_inclusion opening (c::acc) (len+1) state lexbuf }
(* Strings *)
@ -646,8 +633,8 @@ and in_inclusion opening acc len state = parse
and in_string opening state = parse
"\\\"" { copy state lexbuf; in_string opening state lexbuf }
| '"' { copy state lexbuf }
| nl { fail Error.Newline_in_string state lexbuf }
| eof { stop Error.Open_string state opening }
| nl { fail Newline_in_string state lexbuf }
| eof { stop Open_string state opening }
| _ { copy state lexbuf; in_string opening state lexbuf }

16
vendors/Preproc/PreprocMain.ml vendored
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@ -1,9 +1,11 @@
module Region = Simple_utils.Region
let highlight msg = Printf.eprintf "\027[31m%s\027[0m%!" msg
let options = EvalOpt.read ();;
match open_in options#input with
exception Sys_error msg -> prerr_endline msg
exception Sys_error msg -> highlight msg
| cin ->
let buffer = Lexing.from_channel cin in
let open Lexing in
@ -14,12 +16,12 @@ match open_in options#input with
pp -> print_string (Buffer.contents pp)
| exception E_Lexer.Error err ->
let formatted =
E_Lexer.Error.format ~offsets:options#offsets ~file:true err
in prerr_endline formatted.Region.value
| exception Preproc.Error (state, err) ->
E_Lexer.format ~offsets:options#offsets ~file:true err
in highlight formatted.Region.value
| exception Preproc.Error (out, err) ->
let formatted =
Preproc.Error.format ~offsets:options#offsets ~file:true err in
Preproc.format ~offsets:options#offsets ~file:true err in
begin
print_string (Buffer.contents state.Preproc.out);
prerr_endline formatted.Region.value
print_string (Buffer.contents out);
highlight formatted.Region.value
end