## lustrec / src / lexer_prelude.mll @ 365d1b07

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1 | a2d97a3e | ploc | (********************************************************************) |
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2 | (* *) |
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3 | (* The LustreC compiler toolset / The LustreC Development Team *) |
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4 | (* Copyright 2012 - -- ONERA - CNRS - INPT *) |
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5 | (* *) |
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6 | (* LustreC is free software, distributed WITHOUT ANY WARRANTY *) |
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7 | (* under the terms of the GNU Lesser General Public License *) |
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8 | (* version 2.1. *) |
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9 | (* *) |
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10 | (********************************************************************) |
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11 | 22fe1c93 | ploc | |

12 | { |
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13 | open Parser_prelude |
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14 | open Utils |
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15 | |||

16 | exception Error of Location.t |
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17 | |||

18 | (* As advised by Caml documentation. This way a single lexer rule is |
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19 | used to handle all the possible keywords. *) |
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20 | let keyword_table = |
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21 | create_hashtable 20 [ |
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22 | "true", TRUE; |
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23 | "false", FALSE; |
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24 | "stateless", STATELESS; |
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25 | "if", IF; |
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26 | "then", THEN; |
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27 | "else", ELSE; |
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28 | "merge", MERGE; |
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29 | "arrow", ARROW; |
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30 | "fby", FBY; |
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31 | "when", WHEN; |
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32 | "whennot", WHENNOT; |
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33 | "every", EVERY; |
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34 | "node", NODE; |
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35 | "sensor", SENSOR; |
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36 | "actuator", ACTUATOR; |
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37 | "let", LET; |
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38 | "tel", TEL; |
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39 | "returns", RETURNS; |
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40 | "var", VAR; |
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41 | "imported", IMPORTED; |
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42 | "wcet", WCET; |
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43 | "int", TINT; |
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44 | "bool", TBOOL; |
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45 | "float", TFLOAT; |
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46 | "real", TREAL; |
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47 | "clock", TCLOCK; |
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48 | "rate", RATE; |
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49 | "due", DUE; |
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50 | "not", NOT; |
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51 | "tail", TAIL; |
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52 | "and", AND; |
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53 | "or", OR; |
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54 | "xor", OR; |
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55 | "mod", MOD; |
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56 | "pre", PRE; |
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57 | "div", DIV; |
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58 | "const", CONST; |
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59 | "include", INCLUDE |
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60 | ] |
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61 | |||

62 | (* Update line number for location info *) |
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63 | let incr_line lexbuf = |
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64 | let pos = lexbuf.Lexing.lex_curr_p in |
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65 | lexbuf.Lexing.lex_curr_p <- { pos with |
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66 | Lexing.pos_lnum = pos.Lexing.pos_lnum + 1; |
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67 | Lexing.pos_bol = pos.Lexing.pos_cnum; |
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68 | } |
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69 | } |
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70 | |||

71 | let newline = ('\010' | '\013' | "\013\010") |
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72 | let notnewline = [^ '\010' '\013'] |
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73 | let blank = [' ' '\009' '\012'] |
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74 | |||

75 | rule token = parse |
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76 | | "/*" |
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77 | { comment 0 lexbuf } |
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78 | | "--" notnewline* (newline|eof) |
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79 | { incr_line lexbuf; |
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80 | token lexbuf } |
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81 | | newline |
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82 | { incr_line lexbuf; |
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83 | token lexbuf } |
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84 | | blank + |
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85 | {token lexbuf} |
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86 | | ['0'-'9'] ['0'-'9']* '.' ['0'-'9']* |
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87 | {FLOAT (float_of_string (Lexing.lexeme lexbuf))} |
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88 | | ['0'-'9']+ |
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89 | {INT (int_of_string (Lexing.lexeme lexbuf)) } |
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90 | | ['0'-'9']+ '.' ['0'-'9']+ 'E' ('+'|'-') ['0'-'9'] ['0'-'9'] as s {REAL s} |
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91 | | "tel." {TEL} |
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92 | | "tel;" {TEL} |
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93 | | ['_' 'A'-'Z' 'a'-'z'] ['A'-'Z' 'a'-'z' '_' '0'-'9']* |
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94 | {let s = Lexing.lexeme lexbuf in |
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95 | try |
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96 | Hashtbl.find keyword_table s |
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97 | with Not_found -> |
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98 | IDENT s} |
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99 | | "->" {ARROW} |
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100 | | "=>" {IMPL} |
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101 | | "<=" {LTE} |
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102 | | ">=" {GTE} |
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103 | | "<>" {NEQ} |
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104 | | '<' {LT} |
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105 | | '>' {GT} |
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106 | | "!=" {NEQ} |
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107 | | '-' {MINUS} |
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108 | | '+' {PLUS} |
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109 | | '/' {DIV} |
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110 | | '*' {MULT} |
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111 | | '=' {EQ} |
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112 | | '(' {LPAR} |
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113 | | ')' {RPAR} |
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114 | | ';' {SCOL} |
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115 | | ':' {COL} |
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116 | | ',' {COMMA} |
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117 | | '=' {EQ} |
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118 | | '/' {DIV} |
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119 | | "&&" {AMPERAMPER} |
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120 | | "||" {BARBAR} |
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121 | | "*^" {UCLOCK} |
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122 | | "/^" {DCLOCK} |
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123 | | "~>" {PHCLOCK} |
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124 | | "::" {COLCOL} |
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125 | | "^" {POWER} |
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126 | | '"' {QUOTE} |
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127 | | eof { EOF } |
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128 | | _ { raise (Error (Location.curr lexbuf)) } |
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129 | and comment n = parse |
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130 | | eof |
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131 | { raise (Error (Location.curr lexbuf)) } |
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132 | | "/*" |
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133 | { comment (n+1) lexbuf } |
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134 | | "*/" |
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135 | { if n > 0 then comment (n-1) lexbuf else token lexbuf } |
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136 | | newline |
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137 | { incr_line lexbuf; |
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138 | comment n lexbuf } |
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139 | | _ { comment n lexbuf } |