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|
(**************************************************************************)
(* Lem *)
(* *)
(* Dominic Mulligan, University of Cambridge *)
(* Francesco Zappa Nardelli, INRIA Paris-Rocquencourt *)
(* Gabriel Kerneis, University of Cambridge *)
(* Kathy Gray, University of Cambridge *)
(* Peter Boehm, University of Cambridge (while working on Lem) *)
(* Peter Sewell, University of Cambridge *)
(* Scott Owens, University of Kent *)
(* Thomas Tuerk, University of Cambridge *)
(* *)
(* The Lem sources are copyright 2010-2013 *)
(* by the UK authors above and Institut National de Recherche en *)
(* Informatique et en Automatique (INRIA). *)
(* *)
(* All files except ocaml-lib/pmap.{ml,mli} and ocaml-libpset.{ml,mli} *)
(* are distributed under the license below. The former are distributed *)
(* under the LGPLv2, as in the LICENSE file. *)
(* *)
(* *)
(* Redistribution and use in source and binary forms, with or without *)
(* modification, are permitted provided that the following conditions *)
(* are met: *)
(* 1. Redistributions of source code must retain the above copyright *)
(* notice, this list of conditions and the following disclaimer. *)
(* 2. Redistributions in binary form must reproduce the above copyright *)
(* notice, this list of conditions and the following disclaimer in the *)
(* documentation and/or other materials provided with the distribution. *)
(* 3. The names of the authors may not be used to endorse or promote *)
(* products derived from this software without specific prior written *)
(* permission. *)
(* *)
(* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS *)
(* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED *)
(* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE *)
(* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY *)
(* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL *)
(* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE *)
(* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *)
(* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER *)
(* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR *)
(* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *)
(* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *)
(**************************************************************************)
{
open Parser
module M = Map.Make(String)
exception LexError of string * Lexing.position
let r = fun s -> s (* Ulib.Text.of_latin1 *)
(* Available as Scanf.unescaped since OCaml 4.0 but 3.12 is still common *)
let unescaped s = Scanf.sscanf ("\"" ^ s ^ "\"") "%S%!" (fun x -> x)
let kw_table =
List.fold_left
(fun r (x,y) -> M.add x y r)
M.empty
[
("and", (fun _ -> And));
("alias", (fun _ -> Alias));
("as", (fun _ -> As));
("bitzero", (fun _ -> Bitzero));
("bitone", (fun _ -> Bitone));
("bits", (fun _ -> Bits));
("by", (fun _ -> By));
("case", (fun _ -> Case));
("clause", (fun _ -> Clause));
("const", (fun _ -> Const));
("dec", (fun _ -> Dec));
("default", (fun _ -> Default));
("deinfix", (fun _ -> Deinfix));
("effect", (fun _ -> Effect));
("Effect", (fun _ -> EFFECT));
("end", (fun _ -> End));
("enumerate", (fun _ -> Enumerate));
("else", (fun _ -> Else));
("exit", (fun _ -> Exit));
("extern", (fun _ -> Extern));
("false", (fun _ -> False));
("forall", (fun _ -> Forall));
("foreach", (fun _ -> Foreach));
("function", (fun x -> Function_));
("if", (fun x -> If_));
("in", (fun x -> In));
("inc", (fun _ -> Inc));
("IN", (fun x -> IN));
("let", (fun x -> Let_));
("member", (fun x -> Member));
("Nat", (fun x -> Nat));
("Order", (fun x -> Order));
("pure", (fun x -> Pure));
("rec", (fun x -> Rec));
("register", (fun x -> Register));
("scattered", (fun x -> Scattered));
("struct", (fun x -> Struct));
("switch", (fun x -> Switch));
("then", (fun x -> Then));
("true", (fun x -> True));
("Type", (fun x -> TYPE));
("typedef", (fun x -> Typedef));
("undefined", (fun x -> Undefined));
("union", (fun x -> Union));
("with", (fun x -> With));
("val", (fun x -> Val));
("div", (fun x -> Div_));
("mod", (fun x -> Mod));
("quot", (fun x -> Quot));
("quot_s", (fun x -> QuotUnderS));
("rem", (fun x -> Rem));
("barr", (fun x -> Barr));
("rreg", (fun x -> Rreg));
("wreg", (fun x -> Wreg));
("rmem", (fun x -> Rmem));
("wmem", (fun x -> Wmem));
("undef", (fun x -> Undef));
("unspec", (fun x -> Unspec));
("nondet", (fun x -> Nondet));
]
let default_type_names = ["bool";"unit";"vector";"range";"list";"bit";"nat"; "int";
"uint8";"uint16";"uint32";"uint64";"atom";"implicit";"string"]
let custom_type_names : string list ref = ref []
}
let ws = [' ''\t']+
let letter = ['a'-'z''A'-'Z']
let digit = ['0'-'9']
let binarydigit = ['0'-'1']
let hexdigit = ['0'-'9''A'-'F''a'-'f']
let alphanum = letter|digit
let startident = letter|'_'
let ident = alphanum|['_''\'']
let tyvar_start = '\''
let oper_char = ['!''$''%''&''*''+''-''.''/'':''<''=''>''?''@''^''|''~']
let escape_sequence = ('\\' ['\\''\"''\'''n''t''b''r']) | ('\\' digit digit digit) | ('\\' 'x' hexdigit hexdigit)
rule token = parse
| ws
{ token lexbuf }
| "\n"
{ Lexing.new_line lexbuf;
token lexbuf }
| "&" { (Amp(r"&")) }
| "@" { (At(r"@")) }
| "|" { Bar }
| "^" { (Carrot(r"^")) }
| ":" { Colon(r ":") }
| "," { Comma }
| "." { Dot }
| "/" { (Div(r "/")) }
| "=" { (Eq(r"=")) }
| "!" { (Excl(r"!")) }
| ">" { (Gt(r">")) }
| "-" { Minus }
| "<" { (Lt(r"<")) }
| "+" { (Plus(r"+")) }
| ";" { Semi }
| "*" { (Star(r"*")) }
| "~" { (Tilde(r"~")) }
| "_" { Under }
| "{" { Lcurly }
| "}" { Rcurly }
| "(" { Lparen }
| ")" { Rparen }
| "[" { Lsquare }
| "]" { Rsquare }
| "&&" as i { (AmpAmp(r i)) }
| "||" { BarBar }
| "||]" { BarBarSquare }
| "|]" { BarSquare }
| "^^" { (CarrotCarrot(r"^^")) }
| "::" as i { (ColonColon(r i)) }
| ":=" { ColonEq }
| ":>" { ColonGt }
| ":]" { ColonSquare }
| ".." { DotDot }
| "=/=" { (EqDivEq(r"=/=")) }
| "==" { (EqEq(r"==")) }
| "!=" { (ExclEq(r"!=")) }
| "!!" { (ExclExcl(r"!!")) }
| ">=" { (GtEq(r">=")) }
| ">=+" { (GtEqPlus(r">=+")) }
| ">>" { (GtGt(r">>")) }
| ">>>" { (GtGtGt(r">>>")) }
| ">+" { (GtPlus(r">+")) }
| "#>>" { (HashGtGt(r"#>>")) }
| "#<<" { (HashLtLt(r"#<<")) }
| "->" { MinusGt }
| "<:" { LtColon }
| "<=" { (LtEq(r"<=")) }
| "<=+" { (LtEqPlus(r"<=+")) }
| "<>" { (LtGt(r"<>")) }
| "<<" { (LtLt(r"<<")) }
| "<<<" { (LtLtLt(r"<<<")) }
| "<+" { (LtPlus(r"<+")) }
| "**" { (StarStar(r"**")) }
| "[|" { SquareBar }
| "[||" { SquareBarBar }
| "[:" { SquareColon }
| "~^" { (TildeCarrot(r"~^")) }
| "+_s" { (PlusUnderS(r"+_s")) }
| "-_s" { (MinusUnderS(r"-_s")) }
| ">=_s" { (GtEqUnderS(r">=_s")) }
| ">=_si" { (GtEqUnderSi(r">=_si")) }
| ">=_u" { (GtEqUnderU(r">=_u")) }
| ">=_ui" { (GtEqUnderUi(r">=_ui")) }
| ">>_u" { (GtGtUnderU(r">>_u")) }
| ">_s" { (GtUnderS(r">_s")) }
| ">_si" { (GtUnderSi(r">_si")) }
| ">_u" { (GtUnderU(r">_u")) }
| ">_ui" { (GtUnderUi(r">_ui")) }
| "<=_s" { (LtEqUnderS(r"<=_s")) }
| "<=_si" { (LtEqUnderSi(r"<=_si")) }
| "<=_u" { (LtEqUnderU(r"<=_u")) }
| "<=_ui" { (LtEqUnderUi(r"<=_ui")) }
| "<_s" { (LtUnderS(r"<_s")) }
| "<_si" { (LtUnderSi(r"<_si")) }
| "<_u" { (LtUnderU(r"<_u")) }
| "<_ui" { (LtUnderUi(r"<_ui")) }
| "*_s" { (StarUnderS(r"*_s")) }
| "**_s" { (StarStarUnderS(r"**_s")) }
| "**_si" { (StarStarUnderSi(r"**_si")) }
| "*_u" { (StarUnderU(r"*_u")) }
| "*_ui" { (StarUnderUi(r"*_ui")) }
| "2^" { (TwoCarrot(r"2^")) }
| "2**" { TwoStarStar }
| "(*" { comment (Lexing.lexeme_start_p lexbuf) 0 lexbuf; token lexbuf }
| "*)" { raise (LexError("Unbalanced comment", Lexing.lexeme_start_p lexbuf)) }
| tyvar_start startident ident* as i { TyVar(r i) }
| startident ident* as i { if M.mem i kw_table then
(M.find i kw_table) ()
else if
List.mem i default_type_names ||
List.mem i !custom_type_names then
TyId(r i)
else Id(r i) }
| "&" oper_char+ as i { (AmpI(r i)) }
| "@" oper_char+ as i { (AtI(r i)) }
| "^" oper_char+ as i { (CarrotI(r i)) }
| "/" oper_char+ as i { (DivI(r i)) }
| "=" oper_char+ as i { (EqI(r i)) }
| "!" oper_char+ as i { (ExclI(r i)) }
| ">" oper_char+ as i { (GtI(r i)) }
| "<" oper_char+ as i { (LtI(r i)) }
| "+" oper_char+ as i { (PlusI(r i)) }
| "*" oper_char+ as i { (StarI(r i)) }
| "~" oper_char+ as i { (TildeI(r i)) }
| "&&" oper_char+ as i { (AmpAmpI(r i)) }
| "^^" oper_char+ as i { (CarrotCarrotI(r i)) }
| "::" oper_char+ as i { (ColonColonI(r i)) }
| "=/=" oper_char+ as i { (EqDivEqI(r i)) }
| "==" oper_char+ as i { (EqEqI(r i)) }
| "!=" oper_char+ as i { (ExclEqI(r i)) }
| "!!" oper_char+ as i { (ExclExclI(r i)) }
| ">=" oper_char+ as i { (GtEqI(r i)) }
| ">=+" oper_char+ as i { (GtEqPlusI(r i)) }
| ">>" oper_char+ as i { (GtGtI(r i)) }
| ">>>" oper_char+ as i { (GtGtGtI(r i)) }
| ">+" oper_char+ as i { (GtPlusI(r i)) }
| "#>>" oper_char+ as i { (HashGtGt(r i)) }
| "#<<" oper_char+ as i { (HashLtLt(r i)) }
| "<=" oper_char+ as i { (LtEqI(r i)) }
| "<=+" oper_char+ as i { (LtEqPlusI(r i)) }
| "<<" oper_char+ as i { (LtLtI(r i)) }
| "<<<" oper_char+ as i { (LtLtLtI(r i)) }
| "<+" oper_char+ as i { (LtPlusI(r i)) }
| "**" oper_char+ as i { (StarStarI(r i)) }
| "~^" oper_char+ as i { (TildeCarrot(r i)) }
| ">=_s" oper_char+ as i { (GtEqUnderSI(r i)) }
| ">=_si" oper_char+ as i { (GtEqUnderSiI(r i)) }
| ">=_u" oper_char+ as i { (GtEqUnderUI(r i)) }
| ">=_ui" oper_char+ as i { (GtEqUnderUiI(r i)) }
| ">>_u" oper_char+ as i { (GtGtUnderUI(r i)) }
| ">_s" oper_char+ as i { (GtUnderSI(r i)) }
| ">_si" oper_char+ as i { (GtUnderSiI(r i)) }
| ">_u" oper_char+ as i { (GtUnderUI(r i)) }
| ">_ui" oper_char+ as i { (GtUnderUiI(r i)) }
| "<=_s" oper_char+ as i { (LtEqUnderSI(r i)) }
| "<=_si" oper_char+ as i { (LtEqUnderSiI(r i)) }
| "<=_u" oper_char+ as i { (LtEqUnderUI(r i)) }
| "<=_ui" oper_char+ as i { (LtEqUnderUiI(r i)) }
| "<_s" oper_char+ as i { (LtUnderSI(r i)) }
| "<_si" oper_char+ as i { (LtUnderSiI(r i)) }
| "<_u" oper_char+ as i { (LtUnderUI(r i)) }
| "<_ui" oper_char+ as i { (LtUnderUiI(r i)) }
| "**_s" oper_char+ as i { (StarStarUnderSI(r i)) }
| "**_si" oper_char+ as i { (StarStarUnderSiI(r i)) }
| "*_u" oper_char+ as i { (StarUnderUI(r i)) }
| "*_ui" oper_char+ as i { (StarUnderUiI(r i)) }
| "2^" oper_char+ as i { (TwoCarrotI(r i)) }
| digit+ as i { (Num(int_of_string i)) }
| "-" digit+ as i { (Num(int_of_string i)) }
| "0b" (binarydigit+ as i) { (Bin(i)) }
| "0x" (hexdigit+ as i) { (Hex(i)) }
| '"' { (String(
string (Lexing.lexeme_start_p lexbuf) (Buffer.create 10) lexbuf)) }
| eof { Eof }
| _ as c { raise (LexError(
Printf.sprintf "Unexpected character: %c" c,
Lexing.lexeme_start_p lexbuf)) }
and comment pos depth = parse
| "(*" { comment pos (depth+1) lexbuf }
| "*)" { if depth = 0 then ()
else if depth > 0 then comment pos (depth-1) lexbuf
else assert false }
| "\n" { Lexing.new_line lexbuf;
comment pos depth lexbuf }
| '"' { ignore(string (Lexing.lexeme_start_p lexbuf) (Buffer.create 10) lexbuf);
comment pos depth lexbuf }
| _ { comment pos depth lexbuf }
| eof { raise (LexError("Unbalanced comment", pos)) }
and string pos b = parse
| ([^'"''\n''\\']*'\n' as i) { Lexing.new_line lexbuf;
Buffer.add_string b i;
string pos b lexbuf }
| ([^'"''\n''\\']* as i) { Buffer.add_string b i; string pos b lexbuf }
| escape_sequence as i { Buffer.add_string b i; string pos b lexbuf }
| '\\' '\n' ws { Lexing.new_line lexbuf; string pos b lexbuf }
| '\\' { assert false (*raise (Reporting_basic.Fatal_error (Reporting_basic.Err_syntax (pos,
"illegal backslash escape in string"*) }
| '"' { let s = unescaped(Buffer.contents b) in
(*try Ulib.UTF8.validate s; s
with Ulib.UTF8.Malformed_code ->
raise (Reporting_basic.Fatal_error (Reporting_basic.Err_syntax (pos,
"String literal is not valid utf8"))) *) s }
| eof { assert false (*raise (Reporting_basic.Fatal_error (Reporting_basic.Err_syntax (pos,
"String literal not terminated")))*) }
|
