author | wenzelm |
Mon, 20 Jan 2014 20:24:44 +0100 | |
changeset 55106 | 080c0006e917 |
parent 55105 | 75815b3b38a1 |
child 55107 | 1a29ea173bf9 |
permissions | -rw-r--r-- |
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(* Title: Pure/Syntax/lexicon.ML |
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Author: Tobias Nipkow and Markus Wenzel, TU Muenchen |
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Lexer for the inner Isabelle syntax (terms and types). |
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*) |
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signature LEXICON = |
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sig |
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structure Syntax: |
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sig |
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val const: string -> term |
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val free: string -> term |
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val var: indexname -> term |
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end |
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val scan_id: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_longid: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_tid: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_nat: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_int: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_float: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_hex: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_bin: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_var: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val scan_tvar: Symbol_Pos.T list -> Symbol_Pos.T list * Symbol_Pos.T list |
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val is_tid: string -> bool |
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datatype token_kind = |
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Literal | IdentSy | LongIdentSy | VarSy | TFreeSy | TVarSy | |
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NumSy | FloatSy | XNumSy | StrSy | Cartouche | Space | Comment | EOF |
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datatype token = Token of token_kind * string * Position.range |
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val str_of_token: token -> string |
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val pos_of_token: token -> Position.T |
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val is_proper: token -> bool |
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val mk_eof: Position.T -> token |
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val eof: token |
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val is_eof: token -> bool |
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val stopper: token Scan.stopper |
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val terminals: string list |
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val is_terminal: string -> bool |
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val literal_markup: string -> Markup.T |
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val report_of_token: token -> Position.report |
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val reported_token_range: Proof.context -> token -> string |
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val matching_tokens: token * token -> bool |
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val valued_token: token -> bool |
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val predef_term: string -> token option |
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val implode_str: string list -> string |
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val explode_str: string -> string list |
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val tokenize: Scan.lexicon -> bool -> Symbol_Pos.T list -> token list |
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val read_indexname: string -> indexname |
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val read_var: string -> term |
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val read_variable: string -> indexname option |
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val read_nat: string -> int option |
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val read_int: string -> int option |
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val read_xnum: string -> {radix: int, leading_zeros: int, value: int} |
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val read_float: string -> {mant: int, exp: int} |
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val mark_class: string -> string val unmark_class: string -> string |
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val mark_type: string -> string val unmark_type: string -> string |
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val mark_const: string -> string val unmark_const: string -> string |
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val mark_fixed: string -> string val unmark_fixed: string -> string |
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val unmark: |
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{case_class: string -> 'a, |
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case_type: string -> 'a, |
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case_const: string -> 'a, |
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case_fixed: string -> 'a, |
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case_default: string -> 'a} -> string -> 'a |
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val is_marked: string -> bool |
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val dummy_type: term |
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val fun_type: term |
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end; |
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structure Lexicon: LEXICON = |
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struct |
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(** syntaxtic terms **) |
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structure Syntax = |
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struct |
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fun const c = Const (c, dummyT); |
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fun free x = Free (x, dummyT); |
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fun var xi = Var (xi, dummyT); |
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end; |
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(** basic scanners **) |
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open Basic_Symbol_Pos; |
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val err_prefix = "Inner lexical error: "; |
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fun !!! msg = Symbol_Pos.!!! (fn () => err_prefix ^ msg); |
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val scan_id = Symbol_Pos.scan_ident; |
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val scan_longid = scan_id @@@ (Scan.repeat1 ($$$ "." @@@ scan_id) >> flat); |
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val scan_tid = $$$ "'" @@@ scan_id; |
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val scan_nat = Scan.many1 (Symbol.is_digit o Symbol_Pos.symbol); |
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val scan_int = $$$ "-" @@@ scan_nat || scan_nat; |
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val scan_natdot = scan_nat @@@ $$$ "." @@@ scan_nat; |
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val scan_float = $$$ "-" @@@ scan_natdot || scan_natdot; |
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val scan_hex = $$$ "0" @@@ $$$ "x" @@@ Scan.many1 (Symbol.is_ascii_hex o Symbol_Pos.symbol); |
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val scan_bin = $$$ "0" @@@ $$$ "b" @@@ Scan.many1 (fn (s, _) => s = "0" orelse s = "1"); |
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val scan_id_nat = scan_id @@@ Scan.optional ($$$ "." @@@ scan_nat) []; |
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val scan_var = $$$ "?" @@@ scan_id_nat; |
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val scan_tvar = $$$ "?" @@@ $$$ "'" @@@ scan_id_nat; |
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fun is_tid s = |
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(case try (unprefix "'") s of |
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SOME s' => Symbol_Pos.is_identifier s' |
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| NONE => false); |
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(** datatype token **) |
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datatype token_kind = |
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Literal | IdentSy | LongIdentSy | VarSy | TFreeSy | TVarSy | |
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NumSy | FloatSy | XNumSy | StrSy | Cartouche | Space | Comment | EOF; |
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datatype token = Token of token_kind * string * Position.range; |
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fun str_of_token (Token (_, s, _)) = s; |
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fun pos_of_token (Token (_, _, (pos, _))) = pos; |
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fun is_proper (Token (Space, _, _)) = false |
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| is_proper (Token (Comment, _, _)) = false |
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| is_proper _ = true; |
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||
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(* stopper *) |
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fun mk_eof pos = Token (EOF, "", (pos, Position.none)); |
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val eof = mk_eof Position.none; |
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fun is_eof (Token (EOF, _, _)) = true |
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| is_eof _ = false; |
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val stopper = Scan.stopper (K eof) is_eof; |
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(* terminal arguments *) |
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val terminal_kinds = |
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[("id", IdentSy), |
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("longid", LongIdentSy), |
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("var", VarSy), |
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("tid", TFreeSy), |
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("tvar", TVarSy), |
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("num_token", NumSy), |
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("float_token", FloatSy), |
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("xnum_token", XNumSy), |
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("str_token", StrSy), |
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("cartouche", Cartouche)]; |
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val terminals = map #1 terminal_kinds; |
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val is_terminal = member (op =) terminals; |
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(* markup *) |
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fun literal_markup s = |
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if Symbol.is_ascii_identifier s orelse exists Symbol.is_letter (Symbol.explode s) |
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then Markup.literal |
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else Markup.delimiter; |
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val token_kind_markup = |
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fn TFreeSy => Markup.tfree |
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| TVarSy => Markup.tvar |
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| NumSy => Markup.numeral |
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| FloatSy => Markup.numeral |
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| XNumSy => Markup.numeral |
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| StrSy => Markup.inner_string |
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| Cartouche => Markup.inner_cartouche |
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| Comment => Markup.inner_comment |
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| _ => Markup.empty; |
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|
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fun report_of_token (Token (kind, s, (pos, _))) = |
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let val markup = if kind = Literal then literal_markup s else token_kind_markup kind |
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in (pos, markup) end; |
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fun reported_token_range ctxt tok = |
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184 |
if is_proper tok |
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185 |
then Context_Position.reported_text ctxt (pos_of_token tok) Markup.token_range "" |
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else ""; |
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(* matching_tokens *) |
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191 |
fun matching_tokens (Token (Literal, x, _), Token (Literal, y, _)) = x = y |
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| matching_tokens (Token (k, _, _), Token (k', _, _)) = k = k'; |
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(* valued_token *) |
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fun valued_token (Token (Literal, _, _)) = false |
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| valued_token (Token (EOF, _, _)) = false |
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| valued_token _ = true; |
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(* predef_term *) |
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fun predef_term s = |
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(case AList.lookup (op =) terminal_kinds s of |
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SOME sy => SOME (Token (sy, s, Position.no_range)) |
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| NONE => NONE); |
0 | 208 |
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||
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(* str tokens *) |
18 | 211 |
|
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val scan_chr = |
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$$$ "\\" |-- $$$ "'" || |
40525
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parents:
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214 |
Scan.one |
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215 |
((fn s => s <> "\\" andalso s <> "'" andalso Symbol.is_regular s) o |
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40290
diff
changeset
|
216 |
Symbol_Pos.symbol) >> single || |
27773 | 217 |
$$$ "'" --| Scan.ahead (~$$$ "'"); |
14730 | 218 |
|
219 |
val scan_str = |
|
55106 | 220 |
Scan.ahead ($$ "'" -- $$ "'") |-- |
221 |
!!! "unclosed string literal" |
|
222 |
($$$ "'" @@@ $$$ "'" @@@ (Scan.repeat scan_chr >> flat) @@@ $$$ "'" @@@ $$$ "'"); |
|
27800
df444ddeff56
datatype token: maintain range, tuned representation;
wenzelm
parents:
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diff
changeset
|
223 |
|
df444ddeff56
datatype token: maintain range, tuned representation;
wenzelm
parents:
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diff
changeset
|
224 |
val scan_str_body = |
55106 | 225 |
Scan.ahead ($$$ "'" |-- $$$ "'") |-- |
226 |
!!! "unclosed string literal" |
|
227 |
($$ "'" |-- $$ "'" |-- (Scan.repeat scan_chr >> flat) --| $$ "'" --| $$ "'"); |
|
14730 | 228 |
|
0 | 229 |
|
46483 | 230 |
fun implode_str cs = enclose "''" "''" (implode (map (fn "'" => "\\'" | c => c) cs)); |
18 | 231 |
|
46483 | 232 |
fun explode_str str = |
30573 | 233 |
(case Scan.read Symbol_Pos.stopper scan_str_body (Symbol_Pos.explode (str, Position.none)) of |
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
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diff
changeset
|
234 |
SOME cs => map Symbol_Pos.symbol cs |
5868 | 235 |
| _ => error ("Inner lexical error: literal string expected at " ^ quote str)); |
18 | 236 |
|
237 |
||
27806 | 238 |
|
18 | 239 |
(** tokenize **) |
240 |
||
27800
df444ddeff56
datatype token: maintain range, tuned representation;
wenzelm
parents:
27773
diff
changeset
|
241 |
fun token_leq (Token (_, s1, _), Token (_, s2, _)) = s1 <= s2; |
30573 | 242 |
fun token kind ss = Token (kind, Symbol_Pos.content ss, Symbol_Pos.range ss); |
27800
df444ddeff56
datatype token: maintain range, tuned representation;
wenzelm
parents:
27773
diff
changeset
|
243 |
|
df444ddeff56
datatype token: maintain range, tuned representation;
wenzelm
parents:
27773
diff
changeset
|
244 |
fun tokenize lex xids syms = |
18 | 245 |
let |
246 |
val scan_xid = |
|
27773 | 247 |
if xids then $$$ "_" @@@ scan_id || scan_id |
18 | 248 |
else scan_id; |
249 |
||
20096 | 250 |
val scan_num = scan_hex || scan_bin || scan_int; |
251 |
||
550
353eea6ec232
replaced id, var, tid, tvar by idT, varT, tidT, tvarT;
wenzelm
parents:
376
diff
changeset
|
252 |
val scan_val = |
26007
3760d3ff4cce
basic scanners: produce symbol list instead of imploded string;
wenzelm
parents:
24630
diff
changeset
|
253 |
scan_tvar >> token TVarSy || |
3760d3ff4cce
basic scanners: produce symbol list instead of imploded string;
wenzelm
parents:
24630
diff
changeset
|
254 |
scan_var >> token VarSy || |
3760d3ff4cce
basic scanners: produce symbol list instead of imploded string;
wenzelm
parents:
24630
diff
changeset
|
255 |
scan_tid >> token TFreeSy || |
28904 | 256 |
scan_float >> token FloatSy || |
26007
3760d3ff4cce
basic scanners: produce symbol list instead of imploded string;
wenzelm
parents:
24630
diff
changeset
|
257 |
scan_num >> token NumSy || |
27773 | 258 |
$$$ "#" @@@ scan_num >> token XNumSy || |
26007
3760d3ff4cce
basic scanners: produce symbol list instead of imploded string;
wenzelm
parents:
24630
diff
changeset
|
259 |
scan_longid >> token LongIdentSy || |
3760d3ff4cce
basic scanners: produce symbol list instead of imploded string;
wenzelm
parents:
24630
diff
changeset
|
260 |
scan_xid >> token IdentSy; |
18 | 261 |
|
27800
df444ddeff56
datatype token: maintain range, tuned representation;
wenzelm
parents:
27773
diff
changeset
|
262 |
val scan_lit = Scan.literal lex >> token Literal; |
550
353eea6ec232
replaced id, var, tid, tvar by idT, varT, tidT, tvarT;
wenzelm
parents:
376
diff
changeset
|
263 |
|
4703 | 264 |
val scan_token = |
55105 | 265 |
Symbol_Pos.scan_cartouche err_prefix >> token Cartouche || |
266 |
Symbol_Pos.scan_comment err_prefix >> token Comment || |
|
27887 | 267 |
Scan.max token_leq scan_lit scan_val || |
268 |
scan_str >> token StrSy || |
|
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40290
diff
changeset
|
269 |
Scan.many1 (Symbol.is_blank o Symbol_Pos.symbol) >> token Space; |
18 | 270 |
in |
27773 | 271 |
(case Scan.error |
30573 | 272 |
(Scan.finite Symbol_Pos.stopper (Scan.repeat scan_token)) syms of |
27887 | 273 |
(toks, []) => toks |
30573 | 274 |
| (_, ss) => error ("Inner lexical error at: " ^ Symbol_Pos.content ss ^ |
48992 | 275 |
Position.here (#1 (Symbol_Pos.range ss)))) |
18 | 276 |
end; |
277 |
||
278 |
||
279 |
||
280 |
(** scan variables **) |
|
281 |
||
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
282 |
(* scan_indexname *) |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
283 |
|
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
284 |
local |
18 | 285 |
|
27773 | 286 |
val scan_vname = |
18 | 287 |
let |
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
288 |
fun nat n [] = n |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
289 |
| nat n (c :: cs) = nat (n * 10 + (ord c - ord "0")) cs; |
18 | 290 |
|
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
291 |
fun idxname cs ds = (implode (rev cs), nat 0 ds); |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
292 |
fun chop_idx [] ds = idxname [] ds |
50242
56b9c792a98b
support for sub-structured identifier syntax (inactive);
wenzelm
parents:
50239
diff
changeset
|
293 |
| chop_idx (cs as (_ :: "\\<^sub>" :: _)) ds = idxname cs ds |
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
294 |
| chop_idx (c :: cs) ds = |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
295 |
if Symbol.is_digit c then chop_idx cs (c :: ds) |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
296 |
else idxname (c :: cs) ds; |
18 | 297 |
|
50239 | 298 |
val scan = |
299 |
(scan_id >> map Symbol_Pos.symbol) -- |
|
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40290
diff
changeset
|
300 |
Scan.optional ($$$ "." |-- scan_nat >> (nat 0 o map Symbol_Pos.symbol)) ~1; |
18 | 301 |
in |
27773 | 302 |
scan >> |
303 |
(fn (cs, ~1) => chop_idx (rev cs) [] |
|
304 |
| (cs, i) => (implode cs, i)) |
|
18 | 305 |
end; |
306 |
||
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
307 |
in |
18 | 308 |
|
27773 | 309 |
val scan_indexname = $$$ "'" |-- scan_vname >> (fn (x, i) => ("'" ^ x, i)) || scan_vname; |
15443
07f78cc82a73
indexname function now parses type variables as well; changed input
berghofe
parents:
14981
diff
changeset
|
310 |
|
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
311 |
end; |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
312 |
|
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
313 |
|
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
314 |
(* indexname *) |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
315 |
|
20313
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
316 |
fun read_indexname s = |
30573 | 317 |
(case Scan.read Symbol_Pos.stopper scan_indexname (Symbol_Pos.explode (s, Position.none)) of |
15531 | 318 |
SOME xi => xi |
20313
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
319 |
| _ => error ("Lexical error in variable name: " ^ quote s)); |
18 | 320 |
|
321 |
||
4703 | 322 |
(* read_var *) |
18 | 323 |
|
4703 | 324 |
fun read_var str = |
18 | 325 |
let |
326 |
val scan = |
|
42476 | 327 |
$$$ "?" |-- scan_indexname --| Scan.ahead (Scan.one Symbol_Pos.is_eof) |
328 |
>> Syntax.var || |
|
329 |
Scan.many (Symbol.is_regular o Symbol_Pos.symbol) |
|
330 |
>> (Syntax.free o implode o map Symbol_Pos.symbol); |
|
30573 | 331 |
in the (Scan.read Symbol_Pos.stopper scan (Symbol_Pos.explode (str, Position.none))) end; |
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
332 |
|
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
333 |
|
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
334 |
(* read_variable *) |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
335 |
|
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
336 |
fun read_variable str = |
27773 | 337 |
let val scan = $$$ "?" |-- scan_indexname || scan_indexname |
30573 | 338 |
in Scan.read Symbol_Pos.stopper scan (Symbol_Pos.explode (str, Position.none)) end; |
4587 | 339 |
|
340 |
||
20313
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
341 |
(* read numbers *) |
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
342 |
|
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
343 |
local |
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
344 |
|
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
345 |
fun nat cs = |
40525
14a2e686bdac
eliminated slightly odd pervasive Symbol_Pos.symbol;
wenzelm
parents:
40290
diff
changeset
|
346 |
Option.map (#1 o Library.read_int o map Symbol_Pos.symbol) |
30573 | 347 |
(Scan.read Symbol_Pos.stopper scan_nat cs); |
5860 | 348 |
|
20313
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
349 |
in |
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
350 |
|
30573 | 351 |
fun read_nat s = nat (Symbol_Pos.explode (s, Position.none)); |
20313
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
352 |
|
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
353 |
fun read_int s = |
30573 | 354 |
(case Symbol_Pos.explode (s, Position.none) of |
27773 | 355 |
("-", _) :: cs => Option.map ~ (nat cs) |
20313
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
356 |
| cs => nat cs); |
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
357 |
|
bf9101cc4385
renamed Syntax.indexname to Syntax.read_indexname;
wenzelm
parents:
20165
diff
changeset
|
358 |
end; |
5860 | 359 |
|
360 |
||
20096 | 361 |
(* read_xnum: hex/bin/decimal *) |
9326 | 362 |
|
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
363 |
local |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
364 |
|
20096 | 365 |
val ten = ord "0" + 10; |
366 |
val a = ord "a"; |
|
367 |
val A = ord "A"; |
|
35428 | 368 |
val _ = a > A orelse raise Fail "Bad ASCII"; |
20096 | 369 |
|
370 |
fun remap_hex c = |
|
371 |
let val x = ord c in |
|
372 |
if x >= a then chr (x - a + ten) |
|
373 |
else if x >= A then chr (x - A + ten) |
|
374 |
else c |
|
375 |
end; |
|
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
376 |
|
21781 | 377 |
fun leading_zeros ["0"] = 0 |
378 |
| leading_zeros ("0" :: cs) = 1 + leading_zeros cs |
|
379 |
| leading_zeros _ = 0; |
|
380 |
||
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
381 |
in |
15965
f422f8283491
Use of IntInf.int instead of int in most numeric simprocs; avoids
paulson
parents:
15570
diff
changeset
|
382 |
|
9326 | 383 |
fun read_xnum str = |
384 |
let |
|
20096 | 385 |
val (sign, radix, digs) = |
386 |
(case Symbol.explode (perhaps (try (unprefix "#")) str) of |
|
387 |
"0" :: "x" :: cs => (1, 16, map remap_hex cs) |
|
388 |
| "0" :: "b" :: cs => (1, 2, cs) |
|
389 |
| "-" :: cs => (~1, 10, cs) |
|
390 |
| cs => (1, 10, cs)); |
|
29156
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
391 |
in |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
392 |
{radix = radix, |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
393 |
leading_zeros = leading_zeros digs, |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
394 |
value = sign * #1 (Library.read_radix_int radix digs)} |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
395 |
end; |
9326 | 396 |
|
15991
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
397 |
end; |
670f8e4b5a98
added read_variable: optional question mark on input;
wenzelm
parents:
15965
diff
changeset
|
398 |
|
28904 | 399 |
fun read_float str = |
400 |
let |
|
401 |
val (sign, cs) = |
|
29156
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
402 |
(case Symbol.explode str of |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
403 |
"-" :: cs => (~1, cs) |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
404 |
| cs => (1, cs)); |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
405 |
val (intpart, fracpart) = |
28904 | 406 |
(case take_prefix Symbol.is_digit cs of |
29156
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
407 |
(intpart, "." :: fracpart) => (intpart, fracpart) |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
408 |
| _ => raise Fail "read_float"); |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
409 |
in |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
410 |
{mant = sign * #1 (Library.read_int (intpart @ fracpart)), |
89f76a58a378
renamed terminal category "float" to "float_token", to avoid name
wenzelm
parents:
28904
diff
changeset
|
411 |
exp = length fracpart} |
42046
6341c23baf10
added Lexicon.encode_position, Lexicon.decode_position;
wenzelm
parents:
40525
diff
changeset
|
412 |
end; |
6341c23baf10
added Lexicon.encode_position, Lexicon.decode_position;
wenzelm
parents:
40525
diff
changeset
|
413 |
|
42290
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
414 |
|
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
415 |
(* marked logical entities *) |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
416 |
|
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
417 |
fun marker s = (prefix s, unprefix s); |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
418 |
|
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
419 |
val (mark_class, unmark_class) = marker "\\<^class>"; |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
420 |
val (mark_type, unmark_type) = marker "\\<^type>"; |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
421 |
val (mark_const, unmark_const) = marker "\\<^const>"; |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
422 |
val (mark_fixed, unmark_fixed) = marker "\\<^fixed>"; |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
423 |
|
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
424 |
fun unmark {case_class, case_type, case_const, case_fixed, case_default} s = |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
425 |
(case try unmark_class s of |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
426 |
SOME c => case_class c |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
427 |
| NONE => |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
428 |
(case try unmark_type s of |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
429 |
SOME c => case_type c |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
430 |
| NONE => |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
431 |
(case try unmark_const s of |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
432 |
SOME c => case_const c |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
433 |
| NONE => |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
434 |
(case try unmark_fixed s of |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
435 |
SOME c => case_fixed c |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
436 |
| NONE => case_default s)))); |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
437 |
|
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
438 |
val is_marked = |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
439 |
unmark {case_class = K true, case_type = K true, case_const = K true, |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
440 |
case_fixed = K true, case_default = K false}; |
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
441 |
|
42476 | 442 |
val dummy_type = Syntax.const (mark_type "dummy"); |
443 |
val fun_type = Syntax.const (mark_type "fun"); |
|
42290
b1f544c84040
discontinued special treatment of structure Lexicon;
wenzelm
parents:
42264
diff
changeset
|
444 |
|
0 | 445 |
end; |