2 * Copyright (C) 2019 Richard W.M. Jones
3 * Copyright (C) 2019 Red Hat Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 exception SyntaxError of string
29 let pos = lexbuf.lex_curr_p in
31 { pos with pos_bol = lexbuf.lex_curr_pos; pos_lnum = pos.pos_lnum + 1 }
34 let white = [' ' '\t']+
35 let newline = '\r' | '\n' | "\r\n"
36 let comment = '#' (_#'\n')*
37 let id = ['a'-'z' 'A'-'Z' '_'] ['a'-'z' 'A'-'Z' '0'-'9' '_']*
42 | comment { read lexbuf }
43 | newline { new_line lexbuf; read lexbuf }
51 | '"' { read_string (Ast.Substs.create ()) lexbuf }
52 | "{" { read_code (Ast.Substs.create ()) (ref 1) lexbuf }
54 | "tactic" { TACTIC_KEYWORD }
56 | "include" { INCLUDE }
57 | "*" id { (* NB: The initial '*' is part of the name. *)
58 TACTIC (Lexing.lexeme lexbuf) }
59 | id { ID (Lexing.lexeme lexbuf) }
60 | _ { raise (SyntaxError ("unexpected character: " ^
61 Lexing.lexeme lexbuf)) }
64 (* Parse "STRING" literal with %-substitutions. *)
68 { Ast.Substs.add_char buf '"'; read_string buf lexbuf }
70 { Ast.Substs.add_char buf '\007'; read_string buf lexbuf }
72 { Ast.Substs.add_char buf '\008'; read_string buf lexbuf }
74 { Ast.Substs.add_char buf '\009'; read_string buf lexbuf }
76 { Ast.Substs.add_char buf '\010'; read_string buf lexbuf }
78 { Ast.Substs.add_char buf '\011'; read_string buf lexbuf }
80 { Ast.Substs.add_char buf '\012'; read_string buf lexbuf }
82 { Ast.Substs.add_char buf '\013'; read_string buf lexbuf }
84 { Ast.Substs.add_char buf '\\'; read_string buf lexbuf }
85 | '"' { STRING (Ast.Substs.get buf) }
86 | newline { Ast.Substs.add_char buf '\n';
87 new_line lexbuf; read_string buf lexbuf }
88 | '%' '%' { Ast.Substs.add_char buf '%'; read_string buf lexbuf }
89 | '%' id { let id = Lexing.lexeme lexbuf in
90 let len = String.length id in
91 Ast.Substs.add_var buf (String.sub id 1 (len-1));
92 read_string buf lexbuf }
93 | '%' _ { raise (SyntaxError ("illegal character in %-substitution: " ^
94 Lexing.lexeme lexbuf)) }
95 | [^ '"' '\\' '\r' '\n' '%' ]+
96 { Ast.Substs.add_string buf (Lexing.lexeme lexbuf);
97 read_string buf lexbuf }
98 | _ { raise (SyntaxError ("illegal character in string: " ^
99 Lexing.lexeme lexbuf)) }
100 | eof { raise (SyntaxError ("unterminated string")) }
102 (* Parse { CODE } literal with %-substitutions.
104 * Note the range of %-substitutions possible is larger than
107 and read_code buf level =
109 | '{' { incr level; read_code buf level lexbuf }
111 if !level = 0 then CODE (Ast.Substs.get buf)
113 Ast.Substs.add_char buf '}';
114 read_code buf level lexbuf
116 | newline { Ast.Substs.add_char buf '\n';
117 new_line lexbuf; read_code buf level lexbuf }
118 | '%' '%' { Ast.Substs.add_char buf '%'; read_code buf level lexbuf }
119 | '%' '@' { Ast.Substs.add_var buf "@"; read_code buf level lexbuf }
120 | '%' '<' { Ast.Substs.add_var buf "<"; read_code buf level lexbuf }
121 | '%' '^' { Ast.Substs.add_var buf "^"; read_code buf level lexbuf }
122 | '%' id { let id = Lexing.lexeme lexbuf in
123 let len = String.length id in
124 Ast.Substs.add_var buf (String.sub id 1 (len-1));
125 read_code buf level lexbuf }
126 | '%' _ { raise (SyntaxError ("illegal character in %-substitution: " ^
127 Lexing.lexeme lexbuf)) }
128 | [^ '{' '}' '\r' '\n' '%' ]+
129 { Ast.Substs.add_string buf (Lexing.lexeme lexbuf);
130 read_code buf level lexbuf }
131 | _ { raise (SyntaxError ("illegal character in code section: " ^
132 Lexing.lexeme lexbuf)) }
133 | eof { raise (SyntaxError ("unterminated code section")) }