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338 lines
10 KiB
OCaml
338 lines
10 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Heptagon *)
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(* *)
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(* Gwenael Delaval, LIG/INRIA, UJF *)
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(* Leonard Gerard, Parkas, ENS *)
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(* Adrien Guatto, Parkas, ENS *)
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(* Cedric Pasteur, Parkas, ENS *)
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(* *)
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(* Copyright 2012 ENS, INRIA, UJF *)
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(* *)
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(* This file is part of the Heptagon compiler. *)
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(* *)
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(* Heptagon is free software: you can redistribute it and/or modify it *)
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(* under the terms of the GNU General Public License as published by *)
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(* the Free Software Foundation, either version 3 of the License, or *)
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(* (at your option) any later version. *)
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(* *)
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(* Heptagon is distributed in the hope that it will be useful, *)
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(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
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(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *)
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(* GNU General Public License for more details. *)
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(* *)
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(* You should have received a copy of the GNU General Public License *)
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(* along with Heptagon. If not, see <http://www.gnu.org/licenses/> *)
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(* *)
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(***********************************************************************)
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{
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open Lexing
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open Location
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open Hept_parser
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open Compiler_utils
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exception Lexical_error of lexical_error * location;;
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let comment_depth = ref 0
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let keyword_table = ((Hashtbl.create 149) : (string, token) Hashtbl.t);;
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List.iter (fun (str,tok) -> Hashtbl.add keyword_table str tok) [
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"node", NODE;
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"fun", FUN;
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"returns", RETURNS;
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"var", VAR;
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"val", VAL;
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"const", CONST;
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"let", LET;
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"tel", TEL;
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"end", END;
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"fby", FBY;
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"switch", SWITCH;
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"type", TYPE;
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"every", EVERY;
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"true", BOOL(true);
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"false", BOOL(false);
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"pre", PRE;
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"or", OR;
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"not", NOT;
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"open", OPEN;
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"automaton", AUTOMATON;
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"switch", SWITCH;
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"present", PRESENT;
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"reset", RESET;
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"state", STATE;
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"unless", UNLESS;
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"until", UNTIL;
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"last", LAST;
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"if", IF;
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"then", THEN;
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"else", ELSE;
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"default", DEFAULT;
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"continue", CONTINUE;
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"do", DO;
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"done", DONE;
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"in", IN;
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"contract", CONTRACT;
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"assume", ASSUME;
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"enforce", ENFORCE;
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"with", WITH;
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"inlined",INLINED;
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"when", WHEN;
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"whenot", WHENOT;
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"merge", MERGE;
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"on", ON;
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"onot", ONOT;
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"map", MAP;
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"mapi", MAPI;
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"fold", FOLD;
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"foldi", FOLDI;
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"mapfold", MAPFOLD;
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"at", AT;
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"init", INIT;
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"split", SPLIT;
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"reinit", REINIT;
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"unsafe", UNSAFE;
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"external", EXTERNAL;
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"quo", INFIX3("quo");
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"mod", INFIX3("mod");
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"land", INFIX3("land");
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"lor", INFIX2("lor");
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"xor", INFIX2("xor");
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"lsl", INFIX4("lsl");
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"lsr", INFIX4("lsr");
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"asr", INFIX4("asr")
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]
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(* To buffer string literals *)
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let initial_string_buffer = String.create 256
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let string_buff = ref initial_string_buffer
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let string_index = ref 0
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let reset_string_buffer () =
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string_buff := initial_string_buffer;
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string_index := 0;
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()
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let store_string_char c =
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if !string_index >= String.length (!string_buff) then begin
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let new_buff = String.create (String.length (!string_buff) * 2) in
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String.blit (!string_buff) 0 new_buff 0 (String.length (!string_buff));
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string_buff := new_buff
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end;
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String.set (!string_buff) (!string_index) c;
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incr string_index
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let get_stored_string () =
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let s = String.sub (!string_buff) 0 (!string_index) in
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string_buff := initial_string_buffer;
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s
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let char_for_backslash = function
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'n' -> '\010'
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| 'r' -> '\013'
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| 'b' -> '\008'
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| 't' -> '\009'
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| c -> c
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let char_for_decimal_code lexbuf i =
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let c =
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100 * (int_of_char(Lexing.lexeme_char lexbuf i) - 48) +
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10 * (int_of_char(Lexing.lexeme_char lexbuf (i+1)) - 48) +
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(int_of_char(Lexing.lexeme_char lexbuf (i+2)) - 48) in
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char_of_int(c land 0xFF)
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}
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let newline = '\n' | '\r' '\n'
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rule token = parse
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| newline { new_line lexbuf; token lexbuf }
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| [' ' '\t'] + { token lexbuf }
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| "." {DOT}
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| "(" {LPAREN}
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| "<(" {LESS_LPAREN}
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| ")" {RPAREN}
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| ")>" {RPAREN_GREATER}
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| "*" { STAR }
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| "{" {LBRACE}
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| "}" {RBRACE}
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| ":" {COLON}
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| "::" {COLONCOLON}
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| ";" {SEMICOL}
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| "=" {EQUAL}
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| "==" {EQUALEQUAL}
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| "<>" {LESS_GREATER}
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| "&" {AMPERSAND}
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| "&&" {AMPERAMPER}
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| "||" {BARBAR}
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| "," {COMMA}
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| "->" {ARROW}
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| "|" {BAR}
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| "-" {SUBTRACTIVE "-"}
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| "-." {SUBTRACTIVE "-."}
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| "^" {POWER}
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| "[" {LBRACKET}
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| "]" {RBRACKET}
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| "[>" {LBRACKETGREATER}
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| "<]" {LESSRBRACKET}
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| "@" {AROBASE}
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| ".." {DOUBLE_DOT}
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| "<<" {DOUBLE_LESS}
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| ">>" {DOUBLE_GREATER}
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| "..." {THREE_DOTS}
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| (['A'-'Z']('_' ? ['A'-'Z' 'a'-'z' ''' '0'-'9']) * as id)
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{Constructor id}
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| (['A'-'Z' 'a'-'z']('_' ? ['A'-'Z' 'a'-'z' ''' '0'-'9']) * as id)
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{ let s = Lexing.lexeme lexbuf in
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begin try
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Hashtbl.find keyword_table s
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with
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Not_found -> IDENT id
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end
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}
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| ['0'-'9']+
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| '0' ['x' 'X'] ['0'-'9' 'A'-'F' 'a'-'f']+
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| '0' ['o' 'O'] ['0'-'7']+
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| '0' ['b' 'B'] ['0'-'1']+
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{ INT (int_of_string(Lexing.lexeme lexbuf)) }
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| ['0'-'9']+ ('.' ['0'-'9']+)? (['e' 'E'] ['+' '-']? ['0'-'9']+)?
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{ FLOAT (float_of_string(Lexing.lexeme lexbuf)) }
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| "\""
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{ reset_string_buffer();
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(*let string_start = lexbuf.lex_curr_p in
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string_start_loc := Location.curr lexbuf;*)
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string lexbuf;
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(*lexbuf.lex_start_p <- string_start; *)
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STRING (get_stored_string()) }
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| "(*@ " (['A'-'Z' 'a'-'z']('_' ? ['A'-'Z' 'a'-'z' ''' '0'-'9']) * as id)
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{
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reset_string_buffer();
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let l1 = lexbuf.lex_curr_p in
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begin try
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pragma lexbuf
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with Lexical_error(Unterminated_comment, Loc(_, l2)) ->
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raise(Lexical_error(Unterminated_comment, Loc (l1, l2)))
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end;
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PRAGMA(id,get_stored_string())
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}
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| "(*"
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{ let comment_start = lexbuf.lex_curr_p in
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comment_depth := 1;
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begin try
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comment lexbuf
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with Lexical_error(Unterminated_comment, (Loc (_, comment_end))) ->
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raise(Lexical_error(Unterminated_comment,
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Loc (comment_start, comment_end)))
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end;
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token lexbuf }
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| ['!' '?' '~']
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['!' '$' '%' '&' '*' '+' '-' '.' '/' ':'
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'<' '=' '>' '?' '@' '^' '|' '~'] *
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{ PREFIX(Lexing.lexeme lexbuf) }
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| ['=' '<' '>' '&' '|' '&' '$']
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['!' '$' '%' '&' '*' '+' '-' '.' '/' ':' '<' '=' '>'
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'?' '@' '^' '|' '~'] *
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{ INFIX0(Lexing.lexeme lexbuf) }
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| ['@' '^']
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['!' '$' '%' '&' '*' '+' '-' '.' '/' ':' '<' '=' '>'
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'?' '@' '^' '|' '~'] *
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{ INFIX1(Lexing.lexeme lexbuf) }
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| ['+' '-']
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['!' '$' '%' '&' '*' '+' '-' '.' '/' ':' '<' '=' '>'
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'?' '@' '^' '|' '~'] *
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{ INFIX2(Lexing.lexeme lexbuf) }
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| "**"
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['!' '$' '%' '&' '*' '+' '-' '.' '/' ':' '<' '=' '>'
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'?' '@' '^' '|' '~'] *
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{ INFIX4(Lexing.lexeme lexbuf) }
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| ['*' '/' '%']
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['!' '$' '%' '&' '*' '+' '-' '.' '/' ':' '<' '=' '>'
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'?' '@' '^' '|' '~'] *
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{ INFIX3(Lexing.lexeme lexbuf) }
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| eof {EOF}
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| _ {raise (Lexical_error (Illegal_character,
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Loc (Lexing.lexeme_start_p lexbuf,
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Lexing.lexeme_end_p lexbuf)))}
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and pragma = parse
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| newline { new_line lexbuf; pragma lexbuf }
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| "(*"
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{ let comment_start = lexbuf.lex_curr_p in
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comment_depth := 1;
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begin try
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comment lexbuf
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with Lexical_error(Unterminated_comment, Loc (_, comment_end)) ->
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raise(Lexical_error(Unterminated_comment,
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Loc (comment_start, comment_end)))
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end;
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pragma lexbuf }
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| "@*)"
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{ }
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| eof
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{ raise(Lexical_error(Unterminated_comment, Loc (dummy_pos,
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Lexing.lexeme_start_p lexbuf))) }
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| _
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{ store_string_char(Lexing.lexeme_char lexbuf 0);
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pragma lexbuf }
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and comment = parse
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| newline { new_line lexbuf; comment lexbuf }
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| "(*"
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{ comment_depth := succ !comment_depth; comment lexbuf }
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| "*)"
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{ comment_depth := pred !comment_depth;
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if !comment_depth > 0 then comment lexbuf }
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| "\""
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{ reset_string_buffer();
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let string_start = lexbuf.lex_curr_p in
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begin try
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string lexbuf
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with Lexical_error(Unterminated_string, Loc (_, string_end)) ->
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raise(Lexical_error
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(Unterminated_string, Loc (string_start, string_end)))
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end;
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comment lexbuf }
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| "''"
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{ comment lexbuf }
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| "'" [^ '\\' '\''] "'"
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{ comment lexbuf }
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| "'" '\\' ['\\' '\'' 'n' 't' 'b' 'r'] "'"
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{ comment lexbuf }
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| "'" '\\' ['0'-'9'] ['0'-'9'] ['0'-'9'] "'"
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{ comment lexbuf }
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| eof
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{ raise(Lexical_error(Unterminated_comment, Loc(dummy_pos,
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Lexing.lexeme_start_p lexbuf))) }
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| _
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{ comment lexbuf }
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and string = parse
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| newline { new_line lexbuf; string lexbuf }
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| '"'
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{ () }
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| '\\' ("\010" | "\013" | "\013\010") [' ' '\009'] *
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{ string lexbuf }
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| '\\' ['\\' '"' 'n' 't' 'b' 'r']
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{ store_string_char(char_for_backslash(Lexing.lexeme_char lexbuf 1));
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string lexbuf }
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| '\\' ['0'-'9'] ['0'-'9'] ['0'-'9']
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{ store_string_char(char_for_decimal_code lexbuf 1);
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string lexbuf }
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| eof
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{ raise (Lexical_error(Unterminated_string, Loc (dummy_pos,
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Lexing.lexeme_start_p lexbuf))) }
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| _
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{ store_string_char(Lexing.lexeme_char lexbuf 0);
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string lexbuf }
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(* eof *)
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