author | wenzelm |
Sat, 03 Mar 2018 14:54:56 +0100 | |
changeset 67755 | 208235e594f6 |
parent 67572 | a93cf1d6ba87 |
child 69891 | def3ec9cdb7e |
permissions | -rw-r--r-- |
67425 | 1 |
(* Title: Pure/General/comment.ML |
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Author: Makarius |
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Formal comments. |
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*) |
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signature COMMENT = |
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sig |
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datatype kind = Comment | Cancel | Latex |
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30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
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val markups: kind -> Markup.T list |
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more uniform treatment of formal comments within document source;
wenzelm
parents:
67506
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val is_symbol: Symbol.symbol -> bool |
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val scan_comment: (kind * Symbol_Pos.T list) scanner |
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val scan_cancel: (kind * Symbol_Pos.T list) scanner |
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val scan_latex: (kind * Symbol_Pos.T list) scanner |
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val scan: (kind * Symbol_Pos.T list) scanner |
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val read_body: Symbol_Pos.T list -> (kind option * Symbol_Pos.T list) list |
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end; |
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structure Comment: COMMENT = |
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struct |
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(* kinds *) |
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datatype kind = Comment | Cancel | Latex; |
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val kinds = |
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67506
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
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[(Comment, |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
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{symbol = Symbol.comment, blanks = true, |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
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markups = [Markup.language_document true]}), |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
|
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(Cancel, |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
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{symbol = Symbol.cancel, blanks = false, |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
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markups = [Markup.language_text true]}), |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
|
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(Latex, |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
|
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{symbol = Symbol.latex, blanks = false, |
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
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markups = [Markup.language_latex true, Markup.no_words]})]; |
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val get_kind = the o AList.lookup (op =) kinds; |
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val print_kind = quote o #symbol o get_kind; |
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67506
30233285270a
more markup: disable spell-checker for raw latex;
wenzelm
parents:
67429
diff
changeset
|
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val markups = #markups o get_kind; |
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fun is_symbol sym = exists (fn (_, {symbol, ...}) => symbol = sym) kinds; |
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(* scan *) |
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local |
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open Basic_Symbol_Pos; |
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val err_prefix = "Error in formal comment: "; |
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val scan_blanks = Scan.many (Symbol.is_blank o Symbol_Pos.symbol); |
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fun scan_symbol kind = |
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let val {blanks, symbol, ...} = get_kind kind |
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in if blanks then $$$ symbol @@@ scan_blanks else $$$ symbol end; |
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fun scan_strict kind = |
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scan_symbol kind @@@ |
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Symbol_Pos.!!! (fn () => err_prefix ^ "cartouche expected after " ^ print_kind kind) |
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(Symbol_Pos.scan_cartouche err_prefix) >> pair kind; |
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fun scan_permissive kind = |
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scan_symbol kind -- Scan.option (Symbol_Pos.scan_cartouche err_prefix) >> |
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(fn (ss, NONE) => (NONE, ss) | (_, SOME ss) => (SOME kind, ss)); |
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in |
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val scan_comment = scan_strict Comment; |
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val scan_cancel = scan_strict Cancel; |
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val scan_latex = scan_strict Latex; |
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val scan = scan_comment || scan_cancel || scan_latex; |
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val scan_body = |
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Scan.many1 (fn (s, _) => not (is_symbol s) andalso Symbol.not_eof s) >> pair NONE || |
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scan_permissive Comment || scan_permissive Cancel || scan_permissive Latex; |
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fun read_body syms = |
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(if exists (is_symbol o Symbol_Pos.symbol) syms then |
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Scan.read Symbol_Pos.stopper (Scan.repeat scan_body) syms |
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else NONE) |> the_default [(NONE, syms)]; |
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end; |
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end; |