author | wenzelm |
Sat, 24 Oct 2009 21:30:33 +0200 | |
changeset 33097 | 9d501e11084a |
parent 33096 | db3c18fd9708 |
child 33157 | 56f836b9414f |
permissions | -rw-r--r-- |
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(* Title: Pure/General/name_space.ML |
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Author: Markus Wenzel, TU Muenchen |
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Generic name spaces with declared and hidden entries. Unknown names |
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are considered global; no support for absolute addressing. |
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*) |
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type xstring = string; (*external names*) |
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signature BASIC_NAME_SPACE = |
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sig |
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val long_names: bool Unsynchronized.ref |
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val short_names: bool Unsynchronized.ref |
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val unique_names: bool Unsynchronized.ref |
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end; |
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signature NAME_SPACE = |
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sig |
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include BASIC_NAME_SPACE |
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val hidden: string -> string |
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val is_hidden: string -> bool |
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type T |
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val empty: string -> T |
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val kind_of: T -> string |
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val the_entry: T -> string -> {is_system: bool, pos: Position.T, id: serial} |
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val intern: T -> xstring -> string |
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val extern: T -> string -> xstring |
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val extern_flags: {long_names: bool, short_names: bool, unique_names: bool} -> |
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T -> string -> xstring |
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val hide: bool -> string -> T -> T |
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val merge: T * T -> T |
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type naming |
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val default_naming: naming |
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val declare: bool -> naming -> binding -> T -> string * T |
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val full_name: naming -> binding -> string |
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val external_names: naming -> string -> string list |
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val add_path: string -> naming -> naming |
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val root_path: naming -> naming |
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val parent_path: naming -> naming |
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val mandatory_path: string -> naming -> naming |
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type 'a table = T * 'a Symtab.table |
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val define: bool -> naming -> binding * 'a -> 'a table -> string * 'a table |
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val empty_table: string -> 'a table |
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val merge_tables: 'a table * 'a table -> 'a table |
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val join_tables: (string -> 'a * 'a -> 'a) (*Symtab.SAME*) -> |
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'a table * 'a table -> 'a table |
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val dest_table: 'a table -> (string * 'a) list |
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val extern_table: 'a table -> (xstring * 'a) list |
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end; |
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structure Name_Space: NAME_SPACE = |
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struct |
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(** name spaces **) |
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|
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(* hidden entries *) |
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fun hidden name = "??." ^ name; |
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val is_hidden = String.isPrefix "??."; |
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(* datatype entry *) |
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type entry = |
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{externals: xstring list, |
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is_system: bool, |
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pos: Position.T, |
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id: serial}; |
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fun str_of_entry def (name, {pos, id, ...}: entry) = |
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let |
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val occurrence = (if def then Markup.defN else Markup.refN, string_of_int id); |
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val props = occurrence :: Position.properties_of pos; |
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in Markup.markup (Markup.properties props (Markup.entity name)) name end; |
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fun err_dup kind entry1 entry2 = |
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error ("Duplicate " ^ kind ^ " declaration " ^ |
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quote (str_of_entry true entry1) ^ " vs. " ^ quote (str_of_entry true entry2)); |
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(* datatype T *) |
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datatype T = |
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Name_Space of |
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{kind: string, |
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internals: (string list * string list) Symtab.table, (*visible, hidden*) |
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entries: entry Symtab.table}; |
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fun make_name_space (kind, internals, entries) = |
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Name_Space {kind = kind, internals = internals, entries = entries}; |
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fun map_name_space f (Name_Space {kind = kind, internals = internals, entries = entries}) = |
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make_name_space (f (kind, internals, entries)); |
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fun map_internals f xname = map_name_space (fn (kind, internals, entries) => |
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(kind, Symtab.map_default (xname, ([], [])) f internals, entries)); |
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fun empty kind = make_name_space (kind, Symtab.empty, Symtab.empty); |
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fun kind_of (Name_Space {kind, ...}) = kind; |
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fun the_entry (Name_Space {kind, entries, ...}) name = |
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(case Symtab.lookup entries name of |
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NONE => error ("Unknown " ^ kind ^ " " ^ quote name) |
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| SOME {is_system, pos, id, ...} => {is_system = is_system, pos = pos, id = id}); |
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(* name accesses *) |
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fun lookup (Name_Space {internals, ...}) xname = |
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(case Symtab.lookup internals xname of |
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NONE => (xname, true) |
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| SOME ([], []) => (xname, true) |
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| SOME ([name], _) => (name, true) |
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| SOME (name :: _, _) => (name, false) |
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| SOME ([], name' :: _) => (hidden name', true)); |
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fun get_accesses (Name_Space {entries, ...}) name = |
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(case Symtab.lookup entries name of |
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NONE => [name] |
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| SOME {externals, ...} => externals); |
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fun valid_accesses (Name_Space {internals, ...}) name = |
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Symtab.fold (fn (xname, (names, _)) => |
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if not (null names) andalso hd names = name then cons xname else I) internals []; |
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(* intern and extern *) |
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fun intern space xname = #1 (lookup space xname); |
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fun extern_flags {long_names, short_names, unique_names} space name = |
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let |
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fun valid require_unique xname = |
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let val (name', is_unique) = lookup space xname |
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in name = name' andalso (not require_unique orelse is_unique) end; |
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fun ext [] = if valid false name then name else hidden name |
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| ext (nm :: nms) = if valid unique_names nm then nm else ext nms; |
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in |
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if long_names then name |
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else if short_names then Long_Name.base_name name |
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else ext (get_accesses space name) |
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end; |
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val long_names = Unsynchronized.ref false; |
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val short_names = Unsynchronized.ref false; |
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val unique_names = Unsynchronized.ref true; |
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fun extern space name = |
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extern_flags |
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{long_names = ! long_names, |
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short_names = ! short_names, |
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unique_names = ! unique_names} space name; |
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(* modify internals *) |
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val del_name = map_internals o apfst o remove (op =); |
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fun del_name_extra name = |
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map_internals (apfst (fn [] => [] | x :: xs => x :: remove (op =) name xs)); |
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val add_name = map_internals o apfst o update (op =); |
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val add_name' = map_internals o apsnd o update (op =); |
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(* hide *) |
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fun hide fully name space = |
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if not (Long_Name.is_qualified name) then |
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error ("Attempt to hide global name " ^ quote name) |
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else if is_hidden name then |
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error ("Attempt to hide hidden name " ^ quote name) |
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else |
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let val names = valid_accesses space name in |
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space |
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|> add_name' name name |
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|> fold (del_name name) |
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(if fully then names else inter (op =) [Long_Name.base_name name] names) |
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|> fold (del_name_extra name) (get_accesses space name) |
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end; |
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(* merge *) |
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fun merge |
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(Name_Space {kind = kind1, internals = internals1, entries = entries1}, |
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Name_Space {kind = kind2, internals = internals2, entries = entries2}) = |
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let |
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val kind' = |
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if kind1 = kind2 then kind1 |
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else error ("Attempt to merge different kinds of name spaces " ^ |
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quote kind1 ^ " vs. " ^ quote kind2); |
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val internals' = (internals1, internals2) |> Symtab.join |
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(K (fn ((names1, names1'), (names2, names2')) => |
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if pointer_eq (names1, names2) andalso pointer_eq (names1', names2') |
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then raise Symtab.SAME |
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else (Library.merge (op =) (names1, names2), Library.merge (op =) (names1', names2')))); |
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val entries' = (entries1, entries2) |> Symtab.join |
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(fn name => fn (entry1, entry2) => |
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if #id entry1 = #id entry2 then raise Symtab.SAME |
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else err_dup kind' (name, entry1) (name, entry2)); |
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in make_name_space (kind', internals', entries') end; |
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(** naming contexts **) |
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(* datatype naming *) |
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datatype naming = Naming of (string * bool) list; |
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fun map_naming f (Naming path) = Naming (f path); |
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val default_naming = Naming []; |
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fun add_path elems = map_naming (fn path => path @ [(elems, false)]); |
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val root_path = map_naming (fn _ => []); |
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val parent_path = map_naming (perhaps (try (#1 o split_last))); |
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fun mandatory_path elems = map_naming (fn path => path @ [(elems, true)]); |
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(* full name *) |
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fun err_bad binding = error ("Bad name binding " ^ quote (Binding.str_of binding)); |
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fun name_spec (Naming path) binding = |
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let |
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229 |
val (prefix, name) = Binding.dest binding; |
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val _ = Long_Name.is_qualified name andalso err_bad binding; |
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|
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val spec1 = maps (fn (a, b) => map (rpair b) (Long_Name.explode a)) (path @ prefix); |
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val spec2 = if name = "" then [] else [(name, true)]; |
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val spec = spec1 @ spec2; |
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val _ = |
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exists (fn (a, _) => a = "" orelse a = "??" orelse exists_string (fn s => s = "\"") a) spec |
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andalso err_bad binding; |
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in if null spec2 then [] else spec end; |
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|
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fun full naming = name_spec naming #> map fst; |
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fun full_name naming = full naming #> Long_Name.implode; |
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|
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|
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(* accesses *) |
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|
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fun mandatory xs = map_filter (fn (x, true) => SOME x | _ => NONE) xs; |
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|
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fun mandatory_prefixes xs = mandatory xs :: mandatory_prefixes1 xs |
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and mandatory_prefixes1 [] = [] |
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| mandatory_prefixes1 ((x, true) :: xs) = map (cons x) (mandatory_prefixes1 xs) |
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| mandatory_prefixes1 ((x, false) :: xs) = map (cons x) (mandatory_prefixes xs); |
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|
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fun mandatory_suffixes xs = map rev (mandatory_prefixes (rev xs)); |
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|
30522 | 255 |
fun accesses naming binding = |
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let |
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val spec = name_spec naming binding; |
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val sfxs = mandatory_suffixes spec; |
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val pfxs = mandatory_prefixes spec; |
30522 | 260 |
in pairself (map Long_Name.implode) (sfxs @ pfxs, sfxs) end; |
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|
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fun external_names naming = #2 o accesses naming o Binding.qualified_name; |
30233
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eliminated internal stamp equality, replaced by bare-metal pointer_eq;
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|
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|
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(* declaration *) |
28860 | 266 |
|
33096 | 267 |
fun new_entry strict entry = |
268 |
map_name_space (fn (kind, internals, entries) => |
|
269 |
let |
|
270 |
val entries' = |
|
271 |
(if strict then Symtab.update_new else Symtab.update) entry entries |
|
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handle Symtab.DUP dup => |
|
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err_dup kind (dup, the (Symtab.lookup entries dup)) entry; |
|
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in (kind, internals, entries') end); |
|
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|
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fun declare strict naming binding space = |
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let |
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val names = full naming binding; |
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val name = Long_Name.implode names; |
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val _ = name = "" andalso err_bad binding; |
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val (accs, accs') = accesses naming binding; |
33096 | 282 |
val entry = |
283 |
{externals = accs', |
|
284 |
is_system = false, |
|
33097
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pos = Position.default (Binding.pos_of binding), |
33096 | 286 |
id = serial ()}; |
287 |
val space' = space |> fold (add_name name) accs |> new_entry strict (name, entry); |
|
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in (name, space') end; |
28860 | 289 |
|
16137 | 290 |
|
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|
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(** name spaces coupled with symbol tables **) |
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|
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type 'a table = T * 'a Symtab.table; |
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|
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fun define strict naming (binding, x) (space, tab) = |
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let val (name, space') = declare strict naming binding space |
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in (name, (space', Symtab.update (name, x) tab)) end; |
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|
33096 | 300 |
fun empty_table kind = (empty kind, Symtab.empty); |
28860 | 301 |
|
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fun merge_tables ((space1, tab1), (space2, tab2)) = |
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(merge (space1, space2), Symtab.merge (K true) (tab1, tab2)); |
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304 |
|
28991 | 305 |
fun join_tables f ((space1, tab1), (space2, tab2)) = |
306 |
(merge (space1, space2), Symtab.join f (tab1, tab2)); |
|
307 |
||
16848 | 308 |
fun ext_table (space, tab) = |
309 |
Symtab.fold (fn (name, x) => cons ((name, extern space name), x)) tab [] |
|
310 |
|> Library.sort_wrt (#2 o #1); |
|
311 |
||
312 |
fun dest_table tab = map (apfst #1) (ext_table tab); |
|
313 |
fun extern_table tab = map (apfst #2) (ext_table tab); |
|
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314 |
|
5012 | 315 |
end; |
30215
47cce3d47e62
moved name space externalization flags back to name_space.ML;
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|
316 |
|
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
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|
317 |
structure Basic_Name_Space: BASIC_NAME_SPACE = Name_Space; |
32738 | 318 |
open Basic_Name_Space; |
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47cce3d47e62
moved name space externalization flags back to name_space.ML;
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|
319 |