author | wenzelm |
Thu, 12 Mar 2009 13:18:42 +0100 | |
changeset 30469 | de9e8f1d927c |
parent 30465 | 038839f111a1 |
child 30522 | e26b80647189 |
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 mandatory_path: string -> naming -> naming |
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type 'a table = T * 'a Symtab.table |
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val define: 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 ((names1, names1'), (names2, names2')) => |
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if pointer_eq (names1, names2) andalso pointer_eq (names1', names2') 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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fun make_naming (path, no_base_names) = |
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Naming {path = path, no_base_names = no_base_names}; |
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fun map_naming f (Naming {path, no_base_names}) = |
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make_naming (f (path, no_base_names)); |
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(* configure naming *) |
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val default_naming = make_naming ([], false); |
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fun add_path elems = map_naming (fn (path, no_base_names) => |
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(path @ [(elems, false)], no_base_names)); |
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val root_path = map_naming (fn (_, no_base_names) => ([], no_base_names)); |
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val parent_path = map_naming (fn (path, no_base_names) => |
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(perhaps (try (#1 o split_last)) path, no_base_names)); |
19015 | 196 |
|
30469 | 197 |
fun mandatory_path elems = map_naming (fn (path, no_base_names) => |
30465 | 198 |
(path @ [(elems, true)], no_base_names)); |
19015 | 199 |
|
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val no_base_names = map_naming (fn (path, _) => (path, true)); |
28860 | 201 |
|
202 |
||
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(* full name *) |
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|
30465 | 205 |
fun err_bad binding = error ("Bad name binding " ^ quote (Binding.str_of binding)); |
28860 | 206 |
|
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fun name_spec (Naming {path, ...}) binding = |
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let |
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209 |
val (prefix, name) = Binding.dest binding; |
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val _ = Long_Name.is_qualified name andalso err_bad binding; |
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211 |
|
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212 |
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)]; |
30412
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val spec = spec1 @ spec2; |
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215 |
val _ = |
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216 |
exists (fn (a, _) => a = "" orelse a = "??" orelse exists_string (fn s => s = "\"") a) spec |
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217 |
andalso err_bad binding; |
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218 |
in if null spec2 then [] else spec end; |
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219 |
|
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220 |
fun full naming = name_spec naming #> map fst; |
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221 |
fun full_name naming = full naming #> Long_Name.implode; |
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222 |
|
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223 |
|
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224 |
(* accesses *) |
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225 |
|
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226 |
fun mandatory xs = map_filter (fn (x, true) => SOME x | _ => NONE) xs; |
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227 |
|
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228 |
fun mandatory_prefixes xs = mandatory xs :: mandatory_prefixes1 xs |
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229 |
and mandatory_prefixes1 [] = [] |
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230 |
| mandatory_prefixes1 ((x, true) :: xs) = map (cons x) (mandatory_prefixes1 xs) |
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231 |
| mandatory_prefixes1 ((x, false) :: xs) = map (cons x) (mandatory_prefixes xs); |
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|
232 |
|
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|
233 |
fun mandatory_suffixes xs = map rev (mandatory_prefixes (rev xs)); |
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|
234 |
|
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|
235 |
fun accesses (naming as Naming {no_base_names, ...}) binding = |
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|
236 |
let |
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|
237 |
val spec = name_spec naming binding; |
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|
238 |
val sfxs = mandatory_suffixes spec; |
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changeset
|
239 |
val pfxs = mandatory_prefixes spec; |
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|
240 |
in |
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241 |
(sfxs @ pfxs, sfxs) |
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242 |
|> pairself (no_base_names ? filter (fn [_] => false | _ => true)) |
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|
243 |
|> pairself (map Long_Name.implode) |
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|
244 |
end; |
7f5b0a020ccd
just one naming policy based on binding content -- eliminated odd "object-oriented" style;
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changeset
|
245 |
|
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diff
changeset
|
246 |
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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diff
changeset
|
247 |
|
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eliminated internal stamp equality, replaced by bare-metal pointer_eq;
wenzelm
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diff
changeset
|
248 |
|
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changeset
|
249 |
(* declaration *) |
28860 | 250 |
|
30233
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changeset
|
251 |
fun declare naming binding space = |
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changeset
|
252 |
let |
30412
7f5b0a020ccd
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parents:
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diff
changeset
|
253 |
val names = full naming binding; |
7f5b0a020ccd
just one naming policy based on binding content -- eliminated odd "object-oriented" style;
wenzelm
parents:
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diff
changeset
|
254 |
val name = Long_Name.implode names; |
7f5b0a020ccd
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parents:
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diff
changeset
|
255 |
val _ = name = "" andalso err_bad binding; |
7f5b0a020ccd
just one naming policy based on binding content -- eliminated odd "object-oriented" style;
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parents:
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diff
changeset
|
256 |
val (accs, accs') = accesses naming binding; |
30233
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eliminated internal stamp equality, replaced by bare-metal pointer_eq;
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parents:
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changeset
|
257 |
val space' = space |> fold (add_name name) accs |> put_accesses name accs'; |
6eb726e43ed1
eliminated internal stamp equality, replaced by bare-metal pointer_eq;
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parents:
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diff
changeset
|
258 |
in (name, space') end; |
28860 | 259 |
|
16137 | 260 |
|
16341
e573e5167eda
added type NameSpace.table with basic operations;
wenzelm
parents:
16262
diff
changeset
|
261 |
|
e573e5167eda
added type NameSpace.table with basic operations;
wenzelm
parents:
16262
diff
changeset
|
262 |
(** name spaces coupled with symbol tables **) |
e573e5167eda
added type NameSpace.table with basic operations;
wenzelm
parents:
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diff
changeset
|
263 |
|
e573e5167eda
added type NameSpace.table with basic operations;
wenzelm
parents:
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diff
changeset
|
264 |
type 'a table = T * 'a Symtab.table; |
e573e5167eda
added type NameSpace.table with basic operations;
wenzelm
parents:
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diff
changeset
|
265 |
|
30465 | 266 |
fun define naming (binding, x) (space, tab) = |
30233
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parents:
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diff
changeset
|
267 |
let val (name, space') = declare naming binding space |
6eb726e43ed1
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parents:
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diff
changeset
|
268 |
in (name, (space', Symtab.update_new (name, x) tab)) end; |
16341
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added type NameSpace.table with basic operations;
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parents:
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diff
changeset
|
269 |
|
30233
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eliminated internal stamp equality, replaced by bare-metal pointer_eq;
wenzelm
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diff
changeset
|
270 |
val empty_table = (empty, Symtab.empty); |
28860 | 271 |
|
16341
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wenzelm
parents:
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diff
changeset
|
272 |
fun merge_tables eq ((space1, tab1), (space2, tab2)) = |
19367 | 273 |
(merge (space1, space2), Symtab.merge eq (tab1, tab2)); |
16341
e573e5167eda
added type NameSpace.table with basic operations;
wenzelm
parents:
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diff
changeset
|
274 |
|
28991 | 275 |
fun join_tables f ((space1, tab1), (space2, tab2)) = |
276 |
(merge (space1, space2), Symtab.join f (tab1, tab2)); |
|
277 |
||
16848 | 278 |
fun ext_table (space, tab) = |
279 |
Symtab.fold (fn (name, x) => cons ((name, extern space name), x)) tab [] |
|
280 |
|> Library.sort_wrt (#2 o #1); |
|
281 |
||
282 |
fun dest_table tab = map (apfst #1) (ext_table tab); |
|
283 |
fun extern_table tab = map (apfst #2) (ext_table tab); |
|
16341
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parents:
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diff
changeset
|
284 |
|
5012 | 285 |
end; |
30215
47cce3d47e62
moved name space externalization flags back to name_space.ML;
wenzelm
parents:
30213
diff
changeset
|
286 |
|
47cce3d47e62
moved name space externalization flags back to name_space.ML;
wenzelm
parents:
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diff
changeset
|
287 |
structure BasicNameSpace: BASIC_NAME_SPACE = NameSpace; |
47cce3d47e62
moved name space externalization flags back to name_space.ML;
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diff
changeset
|
288 |
open BasicNameSpace; |
47cce3d47e62
moved name space externalization flags back to name_space.ML;
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parents:
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diff
changeset
|
289 |