author | wenzelm |
Tue, 10 Mar 2009 21:18:01 +0100 | |
changeset 30418 | b5044aca0729 |
parent 30412 | 7f5b0a020ccd |
child 30438 | c2d49315b93b |
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 ref |
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val short_names: bool ref |
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val unique_names: bool 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: T |
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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: 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 no_base_names: naming -> naming |
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val qualified_names: naming -> naming |
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val sticky_prefix: string -> naming -> naming |
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type 'a table = T * 'a Symtab.table |
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val bind: naming -> binding * 'a -> 'a table -> string * 'a table (*exception Symtab.DUP*) |
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val empty_table: 'a table |
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val merge_tables: ('a * 'a -> bool) -> 'a table * 'a table -> 'a table (*exception Symtab.DUP*) |
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val join_tables: (string -> 'a * 'a -> 'a) (*exception Symtab.DUP/Symtab.SAME*) -> |
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'a table * 'a table -> 'a table (*exception Symtab.DUP*) |
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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 NameSpace: NAME_SPACE = |
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struct |
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(** name spaces **) |
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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 T *) |
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datatype T = |
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NameSpace of |
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(string list * string list) Symtab.table * (*internals, hidden internals*) |
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xstring list Symtab.table; (*externals*) |
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val empty = NameSpace (Symtab.empty, Symtab.empty); |
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fun lookup (NameSpace (tab, _)) xname = |
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(case Symtab.lookup tab 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 (NameSpace (_, xtab)) name = |
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(case Symtab.lookup xtab name of |
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NONE => [name] |
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| SOME xnames => xnames); |
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fun put_accesses name xnames (NameSpace (tab, xtab)) = |
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NameSpace (tab, Symtab.update (name, xnames) xtab); |
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fun valid_accesses (NameSpace (tab, _)) name = Symtab.fold (fn (xname, (names, _)) => |
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if not (null names) andalso hd names = name then cons xname else I) tab []; |
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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 = ref false; |
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val short_names = ref false; |
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val unique_names = 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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(* basic operations *) |
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local |
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fun map_space f xname (NameSpace (tab, xtab)) = |
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NameSpace (Symtab.map_default (xname, ([], [])) f tab, xtab); |
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in |
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val del_name = map_space o apfst o remove (op =); |
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fun del_name_extra name = map_space (apfst (fn [] => [] | x :: xs => x :: remove (op =) name xs)); |
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val add_name = map_space o apfst o update (op =); |
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val add_name' = map_space o apsnd o update (op =); |
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end; |
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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 names inter_string [Long_Name.base_name name]) |
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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 (NameSpace (tab1, xtab1), NameSpace (tab2, xtab2)) = |
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let |
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val tab' = (tab1, tab2) |> Symtab.join |
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(K (fn names as ((names1, names1'), (names2, names2')) => |
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if pointer_eq names then raise Symtab.SAME |
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else (Library.merge (op =) (names1, names2), Library.merge (op =) (names1', names2')))); |
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val xtab' = (xtab1, xtab2) |> Symtab.join |
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(K (fn xnames => |
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if pointer_eq xnames then raise Symtab.SAME |
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else (Library.merge (op =) xnames))); |
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in NameSpace (tab', xtab') end; |
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(** naming contexts **) |
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(* datatype naming *) |
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datatype naming = Naming of |
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{path: (string * bool) list, |
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no_base_names: bool, |
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qualified_names: bool}; |
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fun make_naming (path, no_base_names, qualified_names) = |
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Naming {path = path, no_base_names = no_base_names, qualified_names = qualified_names}; |
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fun map_naming f (Naming {path, no_base_names, qualified_names}) = |
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make_naming (f (path, no_base_names, qualified_names)); |
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fun path_of (Naming {path, ...}) = path; |
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(* configure naming *) |
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val default_naming = make_naming ([], false, false); |
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fun add_path elems = map_naming (fn (path, no_base_names, qualified_names) => |
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(path @ map (rpair false) (Long_Name.explode elems), no_base_names, qualified_names)); |
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|
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val root_path = map_naming (fn (_, no_base_names, qualified_names) => |
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([], no_base_names, qualified_names)); |
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|
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val parent_path = map_naming (fn (path, no_base_names, qualified_names) => |
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(perhaps (try (#1 o split_last)) path, no_base_names, qualified_names)); |
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|
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fun sticky_prefix elems = map_naming (fn (path, no_base_names, qualified_names) => |
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(path @ map (rpair true) (Long_Name.explode elems), no_base_names, qualified_names)); |
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|
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val no_base_names = map_naming (fn (path, _, qualified_names) => (path, true, qualified_names)); |
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val qualified_names = map_naming (fn (path, no_base_names, _) => (path, no_base_names, true)); |
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|
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||
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(* full name *) |
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|
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fun err_bad binding = error ("Bad name declaration " ^ quote (Binding.str_of binding)); |
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|
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fun name_spec (Naming {path, qualified_names, ...}) binding = |
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let |
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val (prefix, name) = Binding.dest binding; |
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val _ = not qualified_names andalso 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 = |
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(case try split_last (Long_Name.explode name) of |
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NONE => [] |
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| SOME (qual, base) => map (rpair false) qual @ [(base, true)]); |
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|
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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_suffixes1 xs = map rev (mandatory_prefixes1 (rev xs)); |
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fun mandatory_suffixes xs = map rev (mandatory_prefixes (rev xs)); |
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245 |
|
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246 |
fun accesses (naming as Naming {no_base_names, ...}) binding = |
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247 |
let |
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248 |
val spec = name_spec naming binding; |
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val sfxs = mandatory_suffixes spec; |
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250 |
val pfxs = mandatory_prefixes spec; |
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251 |
in |
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252 |
(sfxs @ pfxs, sfxs) |
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|> pairself (no_base_names ? filter (fn [_] => false | _ => true)) |
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|> pairself (map Long_Name.implode) |
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255 |
end; |
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|
256 |
|
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257 |
fun external_names naming = #2 o accesses naming o Binding.qualified_name; |
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|
258 |
|
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|
259 |
|
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260 |
(* declaration *) |
28860 | 261 |
|
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262 |
fun declare naming binding space = |
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263 |
let |
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|
264 |
val names = full naming binding; |
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|
265 |
val name = Long_Name.implode names; |
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|
266 |
val _ = name = "" andalso err_bad binding; |
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|
267 |
val (accs, accs') = accesses naming binding; |
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268 |
val space' = space |> fold (add_name name) accs |> put_accesses name accs'; |
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|
269 |
in (name, space') end; |
28860 | 270 |
|
16137 | 271 |
|
16341
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|
272 |
|
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|
273 |
(** name spaces coupled with symbol tables **) |
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added type NameSpace.table with basic operations;
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|
274 |
|
e573e5167eda
added type NameSpace.table with basic operations;
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|
275 |
type 'a table = T * 'a Symtab.table; |
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276 |
|
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|
277 |
fun bind naming (binding, x) (space, tab) = |
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|
278 |
let val (name, space') = declare naming binding space |
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|
279 |
in (name, (space', Symtab.update_new (name, x) tab)) end; |
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280 |
|
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|
281 |
val empty_table = (empty, Symtab.empty); |
28860 | 282 |
|
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|
283 |
fun merge_tables eq ((space1, tab1), (space2, tab2)) = |
19367 | 284 |
(merge (space1, space2), Symtab.merge eq (tab1, tab2)); |
16341
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changeset
|
285 |
|
28991 | 286 |
fun join_tables f ((space1, tab1), (space2, tab2)) = |
287 |
(merge (space1, space2), Symtab.join f (tab1, tab2)); |
|
288 |
||
16848 | 289 |
fun ext_table (space, tab) = |
290 |
Symtab.fold (fn (name, x) => cons ((name, extern space name), x)) tab [] |
|
291 |
|> Library.sort_wrt (#2 o #1); |
|
292 |
||
293 |
fun dest_table tab = map (apfst #1) (ext_table tab); |
|
294 |
fun extern_table tab = map (apfst #2) (ext_table tab); |
|
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|
295 |
|
5012 | 296 |
end; |
30215
47cce3d47e62
moved name space externalization flags back to name_space.ML;
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changeset
|
297 |
|
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|
298 |
structure BasicNameSpace: BASIC_NAME_SPACE = NameSpace; |
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|
299 |
open BasicNameSpace; |
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changeset
|
300 |