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|
{
(**************************************************************************)
(* *)
(* SMTCoq *)
(* Copyright (C) 2011 - 2019 *)
(* *)
(* See file "AUTHORS" for the list of authors *)
(* *)
(* This file is distributed under the terms of the CeCILL-C licence *)
(* *)
(**************************************************************************)
(* This parser is adapted from Jane Street sexplib parser *)
open Printf
open Lexing
open LfscParser
let char_for_backslash = function
| 'n' -> '\010'
| 'r' -> '\013'
| 'b' -> '\008'
| 't' -> '\009'
| c -> c
let lf = '\010'
let dec_code c1 c2 c3 =
100 * (Char.code c1 - 48) + 10 * (Char.code c2 - 48) + (Char.code c3 - 48)
let hex_code c1 c2 =
let d1 = Char.code c1 in
let val1 =
if d1 >= 97 then d1 - 87
else if d1 >= 65 then d1 - 55
else d1 - 48 in
let d2 = Char.code c2 in
let val2 =
if d2 >= 97 then d2 - 87
else if d2 >= 65 then d2 - 55
else d2 - 48 in
val1 * 16 + val2
let found_newline ({ lex_curr_p; _ } as lexbuf) diff =
lexbuf.lex_curr_p <-
{
lex_curr_p with
pos_lnum = lex_curr_p.pos_lnum + 1;
pos_bol = lex_curr_p.pos_cnum - diff;
}
(* same length computation as in [Lexing.lexeme] *)
let lexeme_len { lex_start_pos; lex_curr_pos; _ } = lex_curr_pos - lex_start_pos
let main_failure lexbuf msg =
let { pos_lnum; pos_bol; pos_cnum; pos_fname = _ } = lexeme_start_p lexbuf in
let msg =
sprintf
"Sexplib.Lexer.main: %s at line %d char %d"
msg pos_lnum (pos_cnum - pos_bol)
in
failwith msg
module type T = sig
module Quoted_string_buffer : sig
type t
val create : int -> t
val add_char : t -> char -> unit
val add_substring : t -> string -> int -> int -> unit
val add_lexeme : t -> lexbuf -> unit
val clear : t -> unit
val of_buffer : Buffer.t -> t
end
module Token : sig
type t
val lparen : t
val rparen : t
val lambda : t
val biglam : t
val pi : t
val colon : t
val hole : t
val sc : t
val at : t
val integer : string -> t
val ident : string -> t
val eof : t
val simple_string : string -> t
val hash_semi : t
val quoted_string : Lexing.position -> Quoted_string_buffer.t -> t
type s = Quoted_string_buffer.t -> Lexing.lexbuf -> t
val comment : string -> main:s -> s
val block_comment : Lexing.position -> main:s -> s
end
end
(* Create and populate a hashtable *)
let mk_hashtbl init =
let tbl = List.length init |> Hashtbl.create in
init |> List.iter (fun (k, v) -> Hashtbl.add tbl k v) ;
tbl
let keywords = mk_hashtbl [
("check", CHECK);
("define", DEFINE);
("declare", DECLARE);
("type", TYPE);
("kind", KIND);
("mpz", MPZ);
("mpq", MPQ);
("program", PROGRAM);
("unsat", UNSAT);
("sat", SAT);
]
module Make (X : T) : sig
val main : ?buf:Buffer.t -> Lexing.lexbuf -> X.Token.t
end = struct (* BEGIN FUNCTOR BODY CONTAINING GENERATED CODE *)
open X
}
let lf = '\010'
let lf_cr = ['\010' '\013']
let dos_newline = "\013\010"
let blank = [' ' '\009' '\012']
let unquoted = [^ ';' '(' ')' '"' '\\' ':' '@' '!' ] # blank # lf_cr
let digit = ['0'-'9']
let hexdigit = digit | ['a'-'f' 'A'-'F']
let unquoted_start =
unquoted # ['#' '|'] | '#' unquoted # ['|'] | '|' unquoted # ['#']
let integer = digit+
let ident = ('_')* ['a'-'z' 'A'-'Z' '\'' ]['a'-'z' 'A'-'Z' '0'-'9' '\\' '_']*
rule main buf = parse
| lf | dos_newline { found_newline lexbuf 0;
main buf lexbuf }
| blank+ { main buf lexbuf }
| (';' (_ # lf_cr)*) as text { Token.comment text ~main buf lexbuf }
| '(' { Token.lparen }
| ')' { Token.rparen }
| '\\' { Token.lambda }
| '!' { Token.pi }
| '%' { Token.biglam }
| '_' { Token.hole }
| ':' { Token.colon }
| '^' { Token.sc }
| '@' { Token.at }
| '(' '~' (integer as i) ')' {Token.integer ("-"^i) }
| integer as i { Token.integer i }
| '"'
{
let pos = Lexing.lexeme_start_p lexbuf in
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf pos lexbuf;
let tok = Token.quoted_string pos buf in
Quoted_string_buffer.clear buf;
tok
}
| "#;" { Token.hash_semi }
| "#|"
{
let pos = Lexing.lexeme_start_p lexbuf in
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_block_comment buf [pos] lexbuf;
let tok = Token.block_comment pos ~main buf lexbuf in
Quoted_string_buffer.clear buf;
tok
}
| "|#" { main_failure lexbuf "illegal end of comment" }
| "#" "#"+ "|" unquoted* (* unquoted_start can match ##, so ##| (which should be
refused) would not not be parsed by this case if the regexp
on the left was not there *)
| "|" "|"+ "#" unquoted*
| unquoted_start unquoted* ("#|" | "|#") unquoted*
{ main_failure lexbuf "comment tokens in unquoted atom" }
| "#" | "|" | unquoted_start unquoted* as str { Token.simple_string str }
| eof { Token.eof }
and scan_string buf start = parse
| '"' { Quoted_string_buffer.add_lexeme buf lexbuf; () }
| '\\' lf [' ' '\t']*
{
let len = lexeme_len lexbuf - 2 in
found_newline lexbuf len;
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| '\\' dos_newline [' ' '\t']*
{
let len = lexeme_len lexbuf - 3 in
found_newline lexbuf len;
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| '\\' (['\\' '\'' '"' 'n' 't' 'b' 'r' ' '] as c)
{
Quoted_string_buffer.add_char buf (char_for_backslash c);
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| '\\' (digit as c1) (digit as c2) (digit as c3)
{
let v = dec_code c1 c2 c3 in
if v > 255 then (
let { pos_lnum; pos_bol; pos_cnum; pos_fname = _ } = lexeme_end_p lexbuf in
let msg =
sprintf
"Sexplib.Lexer.scan_string: \
illegal escape at line %d char %d: `\\%c%c%c'"
pos_lnum (pos_cnum - pos_bol - 3)
c1 c2 c3 in
failwith msg);
Quoted_string_buffer.add_char buf (Char.chr v);
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| '\\' 'x' (hexdigit as c1) (hexdigit as c2)
{
let v = hex_code c1 c2 in
Quoted_string_buffer.add_char buf (Char.chr v);
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| '\\' (_ as c)
{
Quoted_string_buffer.add_char buf '\\';
Quoted_string_buffer.add_char buf c;
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| lf
{
found_newline lexbuf 0;
Quoted_string_buffer.add_char buf lf;
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| ([^ '\\' '"'] # lf)+
{
let ofs = lexbuf.lex_start_pos in
let len = lexbuf.lex_curr_pos - ofs in
Quoted_string_buffer.add_substring buf (Bytes.to_string lexbuf.lex_buffer) ofs len;
Quoted_string_buffer.add_lexeme buf lexbuf;
scan_string buf start lexbuf
}
| eof
{
let msg =
sprintf
"Sexplib.Lexer.scan_string: unterminated string at line %d char %d"
start.pos_lnum (start.pos_cnum - start.pos_bol)
in
failwith msg
}
and scan_block_comment buf locs = parse
| ('#'* | '|'*) lf
{ Quoted_string_buffer.add_lexeme buf lexbuf;
found_newline lexbuf 0; scan_block_comment buf locs lexbuf }
| (('#'* | '|'*) [^ '"' '#' '|'] # lf)+
{ Quoted_string_buffer.add_lexeme buf lexbuf;
scan_block_comment buf locs lexbuf }
| ('#'* | '|'*) '"'
{
Quoted_string_buffer.add_lexeme buf lexbuf;
let cur = lexeme_end_p lexbuf in
let start = { cur with pos_cnum = cur.pos_cnum - 1 } in
scan_string buf start lexbuf;
scan_block_comment buf locs lexbuf
}
| '#'+ '|'
{
Quoted_string_buffer.add_lexeme buf lexbuf;
let cur = lexeme_end_p lexbuf in
let start = { cur with pos_cnum = cur.pos_cnum - 2 } in
scan_block_comment buf (start :: locs) lexbuf
}
| '|'+ '#'
{
Quoted_string_buffer.add_lexeme buf lexbuf;
match locs with
| [_] -> () (* the comment is finished *)
| _ :: (_ :: _ as t) -> scan_block_comment buf t lexbuf
| [] -> assert false (* impossible *)
}
| eof
{
match locs with
| [] -> assert false
| { pos_lnum; pos_bol; pos_cnum; pos_fname = _ } :: _ ->
let msg =
sprintf "Sexplib.Lexer.scan_block_comment: \
unterminated block comment at line %d char %d"
pos_lnum (pos_cnum - pos_bol)
in
failwith msg
}
{ (* RESUME FUNCTOR BODY CONTAINING GENERATED CODE *)
let main ?buf =
let buf =
match buf with
| None -> Quoted_string_buffer.create 64
| Some buf ->
Buffer.clear buf;
Quoted_string_buffer.of_buffer buf
in
main buf
end (* END FUNCTOR BODY CONTAINING GENERATED CODE *)
module Vanilla =
Make (struct
module Quoted_string_buffer = struct
include Buffer
let add_lexeme _ _ = ()
let of_buffer b = b
end
module Token = struct
open LfscParser
type t = token
type s = Quoted_string_buffer.t -> Lexing.lexbuf -> t
let eof = EOF
let lparen = LPAREN
let rparen = RPAREN
let lambda = LAMBDA
let pi = PI
let biglam = BIGLAMBDA
let hole = HOLE
let colon = COLON
let sc = SC
let at = AT
let hash_semi = HASH_SEMI
let integer i = INT (Big_int.big_int_of_string i)
let ident i =
try Hashtbl.find keywords i with Not_found -> STRING i
let simple_string x =
try Hashtbl.find keywords x with Not_found -> STRING x
let quoted_string _ buf = STRING (Buffer.contents buf)
let block_comment _pos ~main buf lexbuf =
main buf lexbuf
let comment _text ~main buf lexbuf =
main buf lexbuf (* skip and continue lexing *)
end
end)
let main = Vanilla.main
}
|