author | wenzelm |
Wed, 20 Jan 2016 15:22:18 +0100 | |
changeset 62213 | c56c2d50dd6d |
parent 61595 | 3591274c607e |
child 62749 | eba34ff9671c |
permissions | -rw-r--r-- |
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moved Isar/antiquote.ML to General/antiquote.ML, which is loaded early;
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(* Title: Pure/General/antiquote.ML |
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antiquotations within plain text: Scala version in accordance to ML;
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Author: Makarius |
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Text with antiquotations of inner items (terms, types etc.).
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antiquotations within plain text: Scala version in accordance to ML;
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Antiquotations within plain text. |
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Text with antiquotations of inner items (terms, types etc.).
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*) |
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Text with antiquotations of inner items (terms, types etc.).
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Text with antiquotations of inner items (terms, types etc.).
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signature ANTIQUOTE = |
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sig |
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clarified control antiquotations: decode control symbol to get name;
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type control = {range: Position.range, name: string * Position.T, body: Symbol_Pos.T list} |
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type antiq = {start: Position.T, stop: Position.T, range: Position.range, body: Symbol_Pos.T list} |
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datatype 'a antiquote = Text of 'a | Control of control | Antiq of antiq |
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type text_antiquote = Symbol_Pos.T list antiquote |
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val range: text_antiquote list -> Position.range |
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val split_lines: text_antiquote list -> text_antiquote list list |
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val antiq_reports: 'a antiquote list -> Position.report list |
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val scan_control: Symbol_Pos.T list -> control * Symbol_Pos.T list |
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val scan_antiq: Symbol_Pos.T list -> antiq * Symbol_Pos.T list |
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val scan_antiquote: Symbol_Pos.T list -> text_antiquote * Symbol_Pos.T list |
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val read': Position.T -> Symbol_Pos.T list -> text_antiquote list |
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val read: Input.source -> text_antiquote list |
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end; |
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structure Antiquote: ANTIQUOTE = |
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struct |
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(* datatype antiquote *) |
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type control = {range: Position.range, name: string * Position.T, body: Symbol_Pos.T list}; |
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type antiq = {start: Position.T, stop: Position.T, range: Position.range, body: Symbol_Pos.T list}; |
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datatype 'a antiquote = Text of 'a | Control of control | Antiq of antiq; |
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type text_antiquote = Symbol_Pos.T list antiquote; |
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||
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fun antiquote_range (Text ss) = Symbol_Pos.range ss |
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| antiquote_range (Control {range, ...}) = range |
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| antiquote_range (Antiq {range, ...}) = range; |
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fun range ants = |
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if null ants then Position.no_range |
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else Position.range (#1 (antiquote_range (hd ants))) (#2 (antiquote_range (List.last ants))); |
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||
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(* split lines *) |
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||
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fun split_lines input = |
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let |
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fun add a (line, lines) = (a :: line, lines); |
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fun flush (line, lines) = ([], rev line :: lines); |
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fun split (a as Text ss) = |
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(case take_prefix (fn ("\n", _) => false | _ => true) ss of |
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([], []) => I |
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| (_, []) => add a |
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| ([], _ :: rest) => flush #> split (Text rest) |
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| (prefix, _ :: rest) => add (Text prefix) #> flush #> split (Text rest)) |
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| split a = add a; |
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in if null input then [] else rev (#2 (flush (fold split input ([], [])))) end; |
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(* reports *) |
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export report -- version that actually covers all cases;
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fun antiq_reports ants = ants |> maps |
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(fn Text _ => [] |
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| Control {range = (pos, _), ...} => [(pos, Markup.antiquoted)] |
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| Antiq {start, stop, range = (pos, _), ...} => |
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[(start, Markup.antiquote), |
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(stop, Markup.antiquote), |
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(pos, Markup.antiquoted), |
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(pos, Markup.language_antiquotation)]); |
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parameterized datatype antiquote and read operation;
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(* scan *) |
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open Basic_Symbol_Pos; |
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local |
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val err_prefix = "Antiquotation lexical error: "; |
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val scan_txt = |
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Scan.repeats1 |
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(Scan.many1 (fn (s, _) => |
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not (Symbol.is_control s) andalso s <> Symbol.open_ andalso s <> "@" andalso Symbol.not_eof s) || |
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$$$ "@" --| Scan.ahead (~$$ "{")); |
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val scan_antiq_body = |
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Scan.trace (Symbol_Pos.scan_string_qq err_prefix || Symbol_Pos.scan_string_bq err_prefix) >> #2 || |
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Symbol_Pos.scan_cartouche err_prefix || |
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Scan.one (fn (s, _) => s <> "}" andalso Symbol.not_eof s) >> single; |
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fun control_name sym = (case Symbol.decode sym of Symbol.Control name => name); |
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allow nested @{antiq} (nonterminal) and @@{antiq} terminal;
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in |
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val scan_control = |
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Scan.option (Scan.one (Symbol.is_control o Symbol_Pos.symbol)) -- |
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Symbol_Pos.scan_cartouche err_prefix >> |
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(fn (opt_control, body) => |
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let |
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val (name, range) = |
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(case opt_control of |
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SOME (sym, pos) => ((control_name sym, pos), Symbol_Pos.range ((sym, pos) :: body)) |
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| NONE => (("cartouche", #2 (hd body)), Symbol_Pos.range body)); |
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in {name = name, range = range, body = body} end) || |
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Scan.one (Symbol.is_control o Symbol_Pos.symbol) >> |
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(fn (sym, pos) => |
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{name = (control_name sym, pos), range = Symbol_Pos.range [(sym, pos)], body = []}); |
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val scan_antiq = |
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Symbol_Pos.scan_pos -- ($$ "@" |-- $$ "{" |-- Symbol_Pos.scan_pos -- |
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Symbol_Pos.!!! (fn () => err_prefix ^ "missing closing brace") |
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(Scan.repeats scan_antiq_body -- Symbol_Pos.scan_pos -- ($$ "}" |-- Symbol_Pos.scan_pos))) >> |
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(fn (pos1, (pos2, ((body, pos3), pos4))) => |
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{start = Position.set_range (pos1, pos2), |
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stop = Position.set_range (pos3, pos4), |
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range = Position.range pos1 pos4, |
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body = body}); |
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parameterized datatype antiquote and read operation;
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val scan_antiquote = |
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scan_txt >> Text || scan_control >> Control || scan_antiq >> Antiq; |
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end; |
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(* read *) |
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fun read' pos syms = |
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(case Scan.read Symbol_Pos.stopper (Scan.repeat scan_antiquote) syms of |
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SOME ants => (Position.reports (antiq_reports ants); ants) |
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| NONE => error ("Malformed quotation/antiquotation source" ^ Position.here pos)); |
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fun read source = read' (Input.pos_of source) (Input.source_explode source); |
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end; |