[ ParseToken__ given_ttype given_tdata token_n token l o i j k and_parity single_object desc_wn many_flag token_allows_multiple prev_indef_wanted; !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! A: Analyse token; handle all not involving object lists, break down others ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! token_filter = 0; switch (given_ttype) { ELEMENTARY_TT: switch (given_tdata) { SPECIAL_TOKEN: l = TryNumber(wn); special_word = NextWord(); #Ifdef DEBUG; if (l ~= -1000) if (parser_trace >= 3) print " [Read special as the number ", l, "]^"; #Endif; ! DEBUG if (l == -1000) { #Ifdef DEBUG; if (parser_trace >= 3) print " [Read special word at word number ", wn, "]^"; #Endif; ! DEBUG l = special_word; } parsed_number = l; return GPR_NUMBER; NUMBER_TOKEN: l=TryNumber(wn++); if (l == -1000) { etype = NUMBER_PE; return GPR_FAIL; } #Ifdef DEBUG; if (parser_trace>=3) print " [Read number as ", l, "]^"; #Endif; ! DEBUG parsed_number = l; return GPR_NUMBER; CREATURE_TOKEN: if (action_to_be == ##Answer or ##Ask or ##AskFor or ##Tell) scope_reason = TALKING_REASON; TOPIC_TOKEN: consult_from = wn; if ((line_ttype-->(token_n+1) ~= PREPOSITION_TT) && (line_token-->(token_n+1) ~= ENDIT_TOKEN)) RunTimeError(13); do o = NextWordStopped(); until (o == -1 || PrepositionChain(o, token_n+1) ~= -1); wn--; consult_words = wn-consult_from; if (consult_words == 0) return GPR_FAIL; if (action_to_be == ##Ask or ##Answer or ##Tell) { o = wn; wn = consult_from; parsed_number = NextWord(); #Ifdef EnglishNaturalLanguage; if (parsed_number == 'the' && consult_words > 1) parsed_number=NextWord(); #Endif; ! EnglishNaturalLanguage wn = o; return 1; } if (o==-1 && (line_ttype-->(token_n+1) == PREPOSITION_TT)) return GPR_FAIL; ! don't infer if required preposition is absent return GPR_PREPOSITION; } PREPOSITION_TT: #Iffalse (Grammar__Version == 1); ! Is it an unnecessary alternative preposition, when a previous choice ! has already been matched? if ((token->0) & $10) return GPR_PREPOSITION; #Endif; ! Grammar__Version ! If we've run out of the player's input, but still have parameters to ! specify, we go into "infer" mode, remembering where we are and the ! preposition we are inferring... if (wn > num_words) { if (inferfrom==0 && parameterspcount = REPARSE_CODE + Dword__No(given_tdata); } ! If we are not inferring, then the line is wrong... if (inferfrom == 0) return -1; ! If not, then the line is right but we mark in the preposition... pattern-->pcount = REPARSE_CODE + Dword__No(given_tdata); return GPR_PREPOSITION; } o = NextWord(); pattern-->pcount = REPARSE_CODE + Dword__No(o); ! Whereas, if the player has typed something here, see if it is the ! required preposition... if it's wrong, the line must be wrong, ! but if it's right, the token is passed (jump to finish this token). if (o == given_tdata) return GPR_PREPOSITION; #Iffalse (Grammar__Version == 1); if (PrepositionChain(o, token_n) ~= -1) return GPR_PREPOSITION; #Endif; ! Grammar__Version return -1; GPR_TT: l = indirect(given_tdata); #Ifdef DEBUG; if (parser_trace >= 3) print " [Outside parsing routine returned ", l, "]^"; #Endif; ! DEBUG return l; SCOPE_TT: scope_token = given_tdata; scope_stage = 1; l = indirect(scope_token); #Ifdef DEBUG; if (parser_trace >= 3) print " [Scope routine returned multiple-flag of ", l, "]^"; #Endif; ! DEBUG if (l == 1) given_tdata = MULTI_TOKEN; else given_tdata = NOUN_TOKEN; ATTR_FILTER_TT: token_filter = 1 + given_tdata; given_tdata = NOUN_TOKEN; ROUTINE_FILTER_TT: token_filter = given_tdata; given_tdata = NOUN_TOKEN; } ! end of switch(given_ttype) token = given_tdata; !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! B: Begin parsing an object list ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! There are now three possible ways we can be here: ! parsing an elementary token other than "special" or "number"; ! parsing a scope token; ! parsing a noun-filter token (either by routine or attribute). ! ! In each case, token holds the type of elementary parse to ! perform in matching one or more objects, and ! token_filter is 0 (default), an attribute + 1 for an attribute filter ! or a routine address for a routine filter. token_allows_multiple = false; if (token == MULTI_TOKEN or MULTIHELD_TOKEN or MULTIEXCEPT_TOKEN or MULTIINSIDE_TOKEN) token_allows_multiple = true; many_flag = false; and_parity = true; dont_infer = false; !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! C: Parse descriptors (articles, pronouns, etc.) in the list ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! We expect to find a list of objects next in what the player's typed. .ObjectList; #Ifdef DEBUG; if (parser_trace >= 3) print " [Object list from word ", wn, "]^"; #Endif; ! DEBUG ! Take an advance look at the next word: if it's "it" or "them", and these ! are unset, set the appropriate error number and give up on the line ! (if not, these are still parsed in the usual way - it is not assumed ! that they still refer to something in scope) o = NextWord(); wn--; pronoun_word = NULL; pronoun_obj = NULL; l = PronounValue(o); if (l ~= 0) { pronoun_word = o; pronoun_obj = l; if (l == NULL) { ! Don't assume this is a use of an unset pronoun until the ! descriptors have been checked, because it might be an ! article (or some such) instead for (l=1 : l<=LanguageDescriptors-->0 : l=l+4) if (o == LanguageDescriptors-->l) jump AssumeDescriptor; pronoun__word = pronoun_word; pronoun__obj = pronoun_obj; etype = VAGUE_PE; return GPR_FAIL; } } .AssumeDescriptor; if (o == ME1__WD or ME2__WD or ME3__WD) { pronoun_word = o; pronoun_obj = player; } allow_plurals = true; desc_wn = wn; .TryAgain; ! First, we parse any descriptive words (like "the", "five" or "every"): l = Descriptors(); if (l ~= 0) { etype = l; return GPR_FAIL; } .TryAgain2; !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! D: Parse an object name ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! This is an actual specified object, and is therefore where a typing error ! is most likely to occur, so we set: oops_from = wn; ! So, two cases. Case 1: token not equal to "held" (so, no implicit takes) ! but we may well be dealing with multiple objects ! In either case below we use NounDomain, giving it the token number as ! context, and two places to look: among the actor's possessions, and in the ! present location. (Note that the order depends on which is likeliest.) if (token ~= HELD_TOKEN) { i = multiple_object-->0; #Ifdef DEBUG; if (parser_trace >= 3) print " [Calling NounDomain on location and actor]^"; #Endif; ! DEBUG l = NounDomain(actors_location, actor, token); if (l == REPARSE_CODE) return l; ! Reparse after Q&A if (indef_wanted == 100 && l == 0 && number_matched == 0) l = 1; ! ReviseMulti if TAKE ALL FROM empty container if (token_allows_multiple && ~~multiflag) { if (best_etype==MULTI_PE) best_etype=STUCK_PE; multiflag = true; } if (l == 0) { if (indef_possambig) { ResetDescriptors(); wn = desc_wn; jump TryAgain2; } if (etype == MULTI_PE or TOOFEW_PE && multiflag) etype = STUCK_PE; etype=CantSee(); jump FailToken; } ! Choose best error #Ifdef DEBUG; if (parser_trace >= 3) { if (l > 1) print " [ND returned ", (the) l, "]^"; else { print " [ND appended to the multiple object list:^"; k = multiple_object-->0; for (j=i+1 : j<=k : j++) print " Entry ", j, ": ", (The) multiple_object-->j, " (", multiple_object-->j, ")^"; print " List now has size ", k, "]^"; } } #Endif; ! DEBUG if (l == 1) { if (~~many_flag) many_flag = true; else { ! Merge with earlier ones k = multiple_object-->0; ! (with either parity) multiple_object-->0 = i; for (j=i+1 : j<=k : j++) { if (and_parity) MultiAdd(multiple_object-->j); else MultiSub(multiple_object-->j); } #Ifdef DEBUG; if (parser_trace >= 3) print " [Merging ", k-i, " new objects to the ", i, " old ones]^"; #Endif; ! DEBUG } } else { ! A single object was indeed found if (match_length == 0 && indef_possambig) { ! So the answer had to be inferred from no textual data, ! and we know that there was an ambiguity in the descriptor ! stage (such as a word which could be a pronoun being ! parsed as an article or possessive). It's worth having ! another go. ResetDescriptors(); wn = desc_wn; jump TryAgain2; } if (token == CREATURE_TOKEN && CreatureTest(l) == 0) { etype = ANIMA_PE; jump FailToken; } ! Animation is required if (~~many_flag) single_object = l; else { if (and_parity) MultiAdd(l); else MultiSub(l); #Ifdef DEBUG; if (parser_trace >= 3) print " [Combining ", (the) l, " with list]^"; #Endif; ! DEBUG } } } else { ! Case 2: token is "held" (which fortunately can't take multiple objects) ! and may generate an implicit take l = NounDomain(actor,actors_location,token); ! Same as above... if (l == REPARSE_CODE) return GPR_REPARSE; if (l == 0) { if (indef_possambig) { ResetDescriptors(); wn = desc_wn; jump TryAgain2; } etype = CantSee(); jump FailToken; ! Choose best error } ! ...until it produces something not held by the actor. Then an implicit ! take must be tried. If this is already happening anyway, things are too ! confused and we have to give up (but saving the oops marker so as to get ! it on the right word afterwards). ! The point of this last rule is that a sequence like ! ! > read newspaper ! (taking the newspaper first) ! The dwarf unexpectedly prevents you from taking the newspaper! ! ! should not be allowed to go into an infinite repeat - read becomes ! take then read, but take has no effect, so read becomes take then read... ! Anyway for now all we do is record the number of the object to take. o = parent(l); if (o ~= actor) { if (notheld_mode == 1) { saved_oops = oops_from; etype = NOTHELD_PE; jump FailToken; } not_holding = l; #Ifdef DEBUG; if (parser_trace >= 3) print " [Allowing object ", (the) l, " for now]^"; #Endif; ! DEBUG } single_object = l; } ! end of if (token ~= HELD_TOKEN) else ! The following moves the word marker to just past the named object... wn = oops_from + match_length; !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! E: Parse connectives ("and", "but", etc.) and go back to (C) ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! Object(s) specified now: is that the end of the list, or have we reached ! "and", "but" and so on? If so, create a multiple-object list if we ! haven't already (and are allowed to). .NextInList; o = NextWord(); if (o == AND1__WD or AND2__WD or AND3__WD or BUT1__WD or BUT2__WD or BUT3__WD or comma_word) { #Ifdef DEBUG; if (parser_trace >= 3) print " [Read connective '", (address) o, "']^"; #Endif; ! DEBUG if (~~token_allows_multiple) { if (multiflag) jump PassToken; ! give UPTO_PE error etype=MULTI_PE; jump FailToken; } if (o == BUT1__WD or BUT2__WD or BUT3__WD) and_parity = 1-and_parity; if (~~many_flag) { multiple_object-->0 = 1; multiple_object-->1 = single_object; many_flag = true; #Ifdef DEBUG; if (parser_trace >= 3) print " [Making new list from ", (the) single_object, "]^"; #Endif; ! DEBUG } dont_infer = true; inferfrom=0; ! Don't print (inferences) jump ObjectList; ! And back around } wn--; ! Word marker back to first not-understood word !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! F: Return the conclusion of parsing an object list ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! Happy or unhappy endings: .PassToken; if (many_flag) { single_object = GPR_MULTIPLE; multi_context = token; } else { if (indef_mode == 1 && indef_type & PLURAL_BIT ~= 0) { if (indef_wanted < 100 && indef_wanted > 1) { multi_had = 1; multi_wanted = indef_wanted; etype = TOOFEW_PE; jump FailToken; } } } return single_object; .FailToken; ! If we were only guessing about it being a plural, try again but only ! allowing singulars (so that words like "six" are not swallowed up as ! Descriptors) if (allow_plurals && indef_guess_p == 1) { #Ifdef DEBUG; if (parser_trace >= 4) print " [Retrying singulars after failure ", etype, "]^"; #Endif; prev_indef_wanted = indef_wanted; allow_plurals = false; wn = desc_wn; jump TryAgain; } if ((indef_wanted > 0 || prev_indef_wanted > 0) && (~~multiflag)) etype = MULTI_PE; return GPR_FAIL; ]; ! end of ParseToken__