Source file ttl_lex.ml
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(** *)
open Ttl_parser;;
module L = Sedlexing.Utf8
let reserved_chars =
List.fold_right Types.CSet.add
['~' ; '.' ; '-' ; '!' ; '$' ; '&' ; '\'' ;
'(' ; ')'; '*'; '+'; ',' ; ';' ; '=' ; '/' ;
'?' ; '#' ; '@'; '%' ; '_' ]
Types.CSet.empty;;
let percent_escape_reserved_chars =
let rec iter b len s i =
if i >= len then
()
else
begin
let size = Utf8.utf8_nb_bytes_of_char s.[i] in
let next =
match size, s.[i] with
1, '\\' ->
if i + size < len &&
Types.CSet.mem s.[i+size] reserved_chars
then
(
Printf.bprintf b "%%%02x" (Char.code s.[i+size]);
i+size+1
)
else
(
Buffer.add_char b s.[i] ;
i + size
)
| _ ->
Buffer.add_string b (String.sub s i size);
i + size
in
iter b len s next
end
in
fun s ->
let len = String.length s in
let b = Buffer.create len in
iter b len s 0 ;
Buffer.contents b
;;
let digit = [%sedlex.regexp? '0'..'9']
let alpha = [%sedlex.regexp? 'a'..'z' | 'A'..'Z']
let hex = [%sedlex.regexp? digit | 'A'..'F' | 'a'..'f']
let pn_chars_base = [%sedlex.regexp ? alpha | 0x00C0 .. 0x00D6 | 0x00D8 .. 0x00F6 | 0x00F8 .. 0x02FF | 0x0370 .. 0x037D | 0x037F .. 0x1FFF | 0x200C .. 0x200D | 0x2070 .. 0x218F | 0x2C00 .. 0x2FEF | 0x3001 .. 0xD7FF | 0xF900 .. 0xFDCF | 0xFDF0 .. 0xFFFD | 0x10000 .. 0xEFFFF]
let pn_chars_u = [%sedlex.regexp? pn_chars_base | '_']
let pn_chars = [%sedlex.regexp? pn_chars_u | '-' | digit | 0x00B7 | 0x0300 .. 0x036F | 0x203F .. 0x2040]
let pn_prefix = [%sedlex.regexp? pn_chars_base, Opt(Star(pn_chars | '.'), pn_chars)]
let percent = [%sedlex.regexp? '%', hex, hex]
let pn_local_sec = [%sedlex.regexp? '\\', ('_' | '~' | '.' | '-' | '!' | '$' | '&' | "'" | '(' | ')' | '*' | '+' | ',' | ';' | '=' | '/' | '?' | '#' | '@' | '%')]
let plx = [%sedlex.regexp? percent | pn_local_sec]
let pn_local = [%sedlex.regexp? (pn_chars_u | ':' | digit | plx), Opt(Star(pn_chars | '.' | ':' | plx), (pn_chars | ':' | plx))]
let uchar = [%sedlex.regexp? ("\\u", hex, hex, hex, hex) | ("\\U", hex, hex, hex, hex, hex, hex, hex, hex)]
let iriref = [%sedlex.regexp? '<', Star(Compl(0x00 .. 0x20) | Chars("<>\\\"{}|^`") | uchar), '>']
let pname_ns = [%sedlex.regexp? Opt(pn_prefix), ':']
let pname_ln = [%sedlex.regexp? pname_ns, pn_local]
let blank_node_label = [%sedlex.regexp? "_:", (pn_chars_u | digit), Opt(Star(pn_chars | '.'), pn_chars)]
let langtag = [%sedlex.regexp? '@', Plus(alpha), Star('-', Plus(alpha|digit))]
let integer = [%sedlex.regexp? Opt('+'|'-'), Plus(digit)]
let decimal = [%sedlex.regexp? Opt('+'|'-'), Star(digit), '.', Plus(digit)]
let exponent = [%sedlex.regexp? ('e'|'E'), Opt('+'|'-'), Plus(digit)]
let double = [%sedlex.regexp?
Opt('+'|'-'),
((Plus(digit), '.', Star(digit), exponent)
| ('.', Plus(digit), exponent)
| Plus(digit), exponent)]
let echar = [%sedlex.regexp? '\\', ('t' | 'b' | 'n' | 'r' | 'f' | '\\' | '"' | '\\')]
let string_literal_quote = [%sedlex.regexp? '"', Star(Compl(0x22 | 0x5C | 0xA | 0xD) | echar | uchar), '"']
let string_literal_single_quote = [%sedlex.regexp? "'", Star(Compl(0x27 | 0x5C | 0xA | 0xD) | echar | uchar), "'"]
let string_literal_long_single_quote = [%sedlex.regexp? "'''", Star((Opt("'" | "''"), Compl('\''|'\\')) | echar | uchar), "'''"]
let string_literal_long_quote = [%sedlex.regexp? "\"\"\"", Star((Opt('"' | "\"\""), Compl('"'|'\\')) | echar | uchar), "\"\"\""]
let ws = [%sedlex.regexp? 0x20 | 0x9 | 0xD | 0xA]
let anon = [%sedlex.regexp? '[', Star(ws), ']']
let comment = [%sedlex.regexp? '#', Star(Compl(0xA|0xD))]
let boolean = [%sedlex.regexp? "true" | "false"]
let sparql_base = [%sedlex.regexp? ('b'|'B'), ('a'|'A'), ('s'|'S'), ('e'|'E')]
let sparql_prefix = [%sedlex.regexp? ('p'|'P'), ('r'|'R'), ('e'|'E'), ('f'|'F'), ('i'|'I'), ('x'|'X')]
let lexpos = Sedlex.upd
let rec main pos lexbuf =
match%sedlex lexbuf with
| 'a' -> lexpos pos lexbuf, A
| "\r\n" -> main (lexpos pos lexbuf) lexbuf
| '\r' -> main (lexpos pos lexbuf) lexbuf
| '\n' -> main (lexpos pos lexbuf) lexbuf
| comment -> main (lexpos pos lexbuf) lexbuf
| ws -> main (lexpos pos lexbuf) lexbuf
| anon -> (lexpos pos lexbuf), ANON
| '(' -> (lexpos pos lexbuf), LEFT_PAR
| ')' -> (lexpos pos lexbuf), RIGHT_PAR
| '[' -> (lexpos pos lexbuf), LEFT_BRACKET
| ']' -> (lexpos pos lexbuf), RIGHT_BRACKET
| ',' -> (lexpos pos lexbuf), COMMA
| ';' -> (lexpos pos lexbuf), SEMICOLON
| '.' -> (lexpos pos lexbuf), DOT
| "@prefix" -> (lexpos pos lexbuf), AT_PREFIX
| "@base" -> (lexpos pos lexbuf), AT_BASE
| sparql_prefix -> (lexpos pos lexbuf), PREFIX
| sparql_base -> (lexpos pos lexbuf), BASE
| langtag ->
let s = L.lexeme lexbuf in
let s = String.sub s 1 (String.length s - 1) in
(lexpos pos lexbuf), At_identifier s
| "^^" -> (lexpos pos lexbuf), HATHAT
| boolean ->
let s = L.lexeme lexbuf in
(lexpos pos lexbuf), Boolean s
| integer ->
let s = L.lexeme lexbuf in
(lexpos pos lexbuf), Integer s
| decimal ->
let s = L.lexeme lexbuf in
(lexpos pos lexbuf), Decimal s
| double ->
let s = L.lexeme lexbuf in
(lexpos pos lexbuf), Double s
| iriref ->
let s = L.lexeme lexbuf in
let iri = String.sub s 1 (String.length s - 2) in
let iri = Utf8.utf8_unescape_to_percent iri in
(lexpos pos lexbuf), Iriref_ iri
| pname_ns ->
let s = L.lexeme lexbuf in
(lexpos pos lexbuf), Identifier (String.sub s 0 (String.length s - 1))
| blank_node_label ->
let s = L.lexeme lexbuf in
let id = String.sub s 2 (String.length s - 2) in
(lexpos pos lexbuf), Bname id
| pname_ln ->
let s = L.lexeme lexbuf in
let p = String.index s ':' in
let s1 =
match String.sub s 0 p with
"" -> None
| s -> Some s
in
let s2 =
let len = String.length s in
if len > p + 1 then
Some (percent_escape_reserved_chars (String.sub s (p+1) (len - p - 1)))
else
None
in
(lexpos pos lexbuf), Qname_ (s1, s2)
| string_literal_quote
| string_literal_single_quote ->
let s = L.lexeme lexbuf in
let s = String.sub s 1 (String.length s - 2) in
(lexpos pos lexbuf), String_ (Utf8.utf8_unescape s)
| string_literal_long_quote
| string_literal_long_single_quote ->
let s = L.lexeme lexbuf in
let s = String.sub s 3 (String.length s - 6) in
let pos = lexpos pos lexbuf in
pos, String_ (Utf8.utf8_unescape s)
| eof -> (lexpos pos lexbuf), EOF
| _ ->
let s = L.lexeme lexbuf in
let pos = lexpos pos lexbuf in
let e = Failure (Printf.sprintf "Lexeme %S not handled" s) in
raise (Sedlex.Parse_error (e, pos))
;;