DIRECTORYRope USING [ROPE, Text];Atom: CEDAR DEFINITIONS  = BEGIN PropList: TYPE = LIST OF DottedPair;DottedPair: TYPE = REF DottedPairNode;DottedPairNode: TYPE = RECORD [key, val: REF ANY];EmptyAtom: PROC RETURNS[ATOM]; -- returns the atom with pname = ""MakeAtom: PROC [pName: Rope.ROPE] RETURNS[ATOM];MakeAtomFromChar: PROC [char: CHARACTER] RETURNS[ATOM];MakeAtomFromRefText: PROC [rt: REF READONLY TEXT] RETURNS[ATOM];GetPName: PROC[atom: ATOM] RETURNS[pName: Rope.Text]; GetPropertyList: PROC [atom: ATOM] RETURNS[PropList]; -- gets entire property listGetProp: PROC [atom: ATOM, prop: REF ANY] RETURNS[REF ANY];GetPropFromList: PROC [propList: PropList, prop: REF ANY] RETURNS[REF ANY];PutProp:  PROC [atom: ATOM, prop: REF ANY, val: REF ANY];PutPropOnList: PROC [propList: PropList, prop: REF ANY, val: REF ANY] RETURNS[PropList];RemProp:  PROC [atom: ATOM, prop: REF ANY];RemPropFromList: PROC [propList: PropList, prop: REF ANY] RETURNS[PropList];MapAtoms: PROC[proc: PROC[atom: ATOM]];FindAtom: PROC[proc: PROC[atom: ATOM] RETURNS[stop: BOOLEAN]] RETURNS[ATOM];NILNotAnAtom:  ERROR;END.   ╘  Atom.Mesalast edited October 26, 1982 4:15 pm by Warren Teitelmanlast edited September 19, 1983 8:43 pm by Paul RovnerTypesCreating AtomsThe following identity holds: Rope.Equal[r1,r2] <=> MakeAtom[r1] = MakeAtom[r2]. In particular, MakeAtom[""] = MakeAtom[NIL] = emptyAtom. Note that NIL # MakeAtom[NIL].PNamesProperty list operationsprovides a way of associating information with unique keys (atoms) using a single global name space.Note: An alternative way of associating information with unique keys...that can be arbitrary REFS, in a non-global fashion using specific structures (hash tables)  is provided by the RefTab interface, which is also exported by ListsAndAtoms.bcdEnumeration of atomsErrorsЭ╩─  Ц"Cedar" styleШ JШ JЪЬ	Щ	JЪЬ8Щ8JЪЬ5Щ5JШ Ъ╧k	Ш	JЪЬЭЬЭЬШJШ ЧJЪ╨blЬЭЬЭЬШJЪЭЬШheadЪ╧nЩЪЯЬЭЬЭЬЭЬШ$JЪ╧b
ЬЭЬЭЬШ&JЪ
аЬЭЬЭЬЭЬЭЬШ2ЧЧЪЯЩJЪ	Я	ЬЭЬЭЬЭЬ╧c#ШBJШ Ъ
ЯЬЭЬЭЬЭЬЭЬШ0JЪЬиЩиЧJШ JЪ
ЯЬЭЬЭ	ЬЭЬЭЬШ7JЪЯЬЭЬЭЬЭЬЭЬЭЬЭЬШ@ЧЪЯЩJЪЯЬЭЬЭЬЭЬШ6ЧЪЬЩJЪЬdЩdЪЬGЩGJЪЬнЩнЧJШ JЪ	ЯЬЭЬЭЬЭЬбШRJЪЯЬЭЬЭЬЭЬЭЬЭЬЭЬЭЬШ;JЪЯЬЭЬЭЬЭЬЭЬЭЬЭЬШKJЪЯЬЭЬЭЬЭЬЭЬЭЬЭЬШ9JЪЯЬЭЬЭЬЭЬЭЬЭЬЭЬШXJЪ
ЯЬЭЬЭЬЭЬЭЬШ+JЪ
ЯЬЭЬЭЬЭЬЭЬШLЧЪЬЩJЪЯЬЭЬЭЬЭЬШ'JЪЯЬЭЬЭЬЭЬЭЬЭЬЭЬЭЬШLЧЪЯЩJЪЯЬЭЬШJШ ЧJЪЭЬШJШ Ч ЕЧ    j  
  