SCI: Allow multiple word groups in parser

In SCI01 and up, each typed word may be interpreted as multiple
class,group pairs. This patch adds support to the vocabulary and
parser. It uses the matcher support added in r52985.

This fixes parser issues in German LSL3, but needs testing.

svn-id: r52989

5 files changed, 173 insertions, 68 deletions

diff --git a/engines/sci/console.cpp b/engines/sci/console.cpp
index c26cd60a25..51ec9cfe9e 100644
--- a/engines/sci/console.cpp
+++ b/engines/sci/console.cpp
@@ -1204,7 +1204,6 @@ bool Console::cmdParse(int argc, const char **argv) {
 		return true;
 	}
 
-	ResultWordList words;
 	char *error;
 	char string[1000];
 
@@ -1216,6 +1215,8 @@ bool Console::cmdParse(int argc, const char **argv) {
 	}
 
 	DebugPrintf("Parsing '%s'\n", string);
+
+	ResultWordListList words;
 	bool res = _engine->getVocabulary()->tokenizeString(words, string, &error);
 	if (res && !words.empty()) {
 		int syntax_fail = 0;
@@ -1224,8 +1225,13 @@ bool Console::cmdParse(int argc, const char **argv) {
 
 		DebugPrintf("Parsed to the following blocks:\n");
 
-		for (ResultWordList::const_iterator i = words.begin(); i != words.end(); ++i)
-			DebugPrintf("   Type[%04x] Group[%04x]\n", i->_class, i->_group);
+		for (ResultWordListList::const_iterator i = words.begin(); i != words.end(); ++i) {
+			DebugPrintf("   ");
+			for (ResultWordList::const_iterator j = i->begin(); j != i->end(); ++j) {
+				DebugPrintf("%sType[%04x] Group[%04x]", j == i->begin() ? "" : " / ", j->_class, j->_group);
+			}
+			DebugPrintf("\n");
+		}
 
 		if (_engine->getVocabulary()->parseGNF(words, true))
 			syntax_fail = 1; // Building a tree failed
@@ -1252,7 +1258,6 @@ bool Console::cmdSaid(int argc, const char **argv) {
 		return true;
 	}
 
-	ResultWordList words;
 	char *error;
 	char string[1000];
 	byte spec[1000];
@@ -1326,6 +1331,7 @@ bool Console::cmdSaid(int argc, const char **argv) {
 	_engine->getVocabulary()->debugDecipherSaidBlock(spec);
 	printf("\n");
 
+	ResultWordListList words;
 	bool res = _engine->getVocabulary()->tokenizeString(words, string, &error);
 	if (res && !words.empty()) {
 		int syntax_fail = 0;
@@ -1334,8 +1340,15 @@ bool Console::cmdSaid(int argc, const char **argv) {
 
 		DebugPrintf("Parsed to the following blocks:\n");
 
-		for (ResultWordList::const_iterator i = words.begin(); i != words.end(); ++i)
-			DebugPrintf("   Type[%04x] Group[%04x]\n", i->_class, i->_group);
+		for (ResultWordListList::const_iterator i = words.begin(); i != words.end(); ++i) {
+			DebugPrintf("   ");
+			for (ResultWordList::const_iterator j = i->begin(); j != i->end(); ++j) {
+				DebugPrintf("%sType[%04x] Group[%04x]", j == i->begin() ? "" : " / ", j->_class, j->_group);
+			}
+			DebugPrintf("\n");
+		}
+
+
 
 		if (_engine->getVocabulary()->parseGNF(words, true))
 			syntax_fail = 1; // Building a tree failed
diff --git a/engines/sci/engine/kparse.cpp b/engines/sci/engine/kparse.cpp
index be32b340bb..6a052a582d 100644
--- a/engines/sci/engine/kparse.cpp
+++ b/engines/sci/engine/kparse.cpp
@@ -93,13 +93,13 @@ reg_t kParse(EngineState *s, int argc, reg_t *argv) {
 	reg_t stringpos = argv[0];
 	Common::String string = s->_segMan->getString(stringpos);
 	char *error;
-	ResultWordList words;
 	reg_t event = argv[1];
 	g_sci->checkVocabularySwitch();
 	Vocabulary *voc = g_sci->getVocabulary();
 	voc->parser_event = event;
 	reg_t params[2] = { voc->parser_base, stringpos };
 
+	ResultWordListList words;
 	bool res = voc->tokenizeString(words, string.c_str(), &error);
 	voc->parserIsValid = false; /* not valid */
 
@@ -109,10 +109,15 @@ reg_t kParse(EngineState *s, int argc, reg_t *argv) {
 		s->r_acc = make_reg(0, 1);
 
 #ifdef DEBUG_PARSER
-			debugC(2, kDebugLevelParser, "Parsed to the following blocks:");
-
-			for (ResultWordList::const_iterator i = words.begin(); i != words.end(); ++i)
-				debugC(2, kDebugLevelParser, "   Type[%04x] Group[%04x]", i->_class, i->_group);
+		debugC(2, kDebugLevelParser, "Parsed to the following blocks:");
+
+		for (ResultWordListList::const_iterator i = words.begin(); i != words.end(); ++i) {
+			debugCN(2, kDebugLevelParser, "   ");
+			for (ResultWordList::const_iterator j = i->begin(); j != i->end(); ++j) {
+				debugCN(2, kDebugLevelParser, "%sType[%04x] Group[%04x]", j == i->begin() ? "" : " / ", j->_class, j->_group);
+			}
+			debugCN(2, kDebugLevelParser, "\n");
+		}
 #endif
 
 		int syntax_fail = voc->parseGNF(words);
diff --git a/engines/sci/parser/grammar.cpp b/engines/sci/parser/grammar.cpp
index ae5ff81045..03e9d29660 100644
--- a/engines/sci/parser/grammar.cpp
+++ b/engines/sci/parser/grammar.cpp
@@ -38,8 +38,9 @@ namespace Sci {
 #define TOKEN_CPAREN 0xfe000000
 #define TOKEN_TERMINAL_CLASS 0x10000
 #define TOKEN_TERMINAL_GROUP 0x20000
-#define TOKEN_STUFFING_WORD 0x40000
-#define TOKEN_NON_NT (TOKEN_OPAREN | TOKEN_TERMINAL_CLASS | TOKEN_TERMINAL_GROUP | TOKEN_STUFFING_WORD)
+#define TOKEN_STUFFING_LEAF 0x40000
+#define TOKEN_STUFFING_WORD 0x80000
+#define TOKEN_NON_NT (TOKEN_OPAREN | TOKEN_TERMINAL_CLASS | TOKEN_TERMINAL_GROUP | TOKEN_STUFFING_LEAF | TOKEN_STUFFING_WORD)
 #define TOKEN_TERMINAL (TOKEN_TERMINAL_CLASS | TOKEN_TERMINAL_GROUP)
 
 static int _allocd_rules = 0;	// FIXME: Avoid non-const global vars
@@ -122,8 +123,10 @@ static void vocab_print_rule(ParseRule *rule) {
 				printf("C(%04x)", token & 0xffff);
 			else if (token & TOKEN_TERMINAL_GROUP)
 				printf("G(%04x)", token & 0xffff);
-			else if (token & TOKEN_STUFFING_WORD)
+			else if (token & TOKEN_STUFFING_LEAF)
 				printf("%03x", token & 0xffff);
+			else if (token & TOKEN_STUFFING_WORD)
+				printf("{%03x}", token & 0xffff);
 			else
 				printf("[%03x]", token); /* non-terminal */
 			wspace = 1;
@@ -206,8 +209,8 @@ static ParseRule *_vbuild_rule(const parse_tree_branch_t *branch) {
 			rule->_data[tokens++] = value | TOKEN_STUFFING_WORD;
 		else { // normal inductive rule
 			rule->_data[tokens++] = TOKEN_OPAREN;
-			rule->_data[tokens++] = type | TOKEN_STUFFING_WORD;
-			rule->_data[tokens++] = value | TOKEN_STUFFING_WORD;
+			rule->_data[tokens++] = type | TOKEN_STUFFING_LEAF;
+			rule->_data[tokens++] = value | TOKEN_STUFFING_LEAF;
 
 			if (i == 0)
 				rule->_firstSpecial = tokens;
@@ -220,7 +223,7 @@ static ParseRule *_vbuild_rule(const parse_tree_branch_t *branch) {
 	return rule;
 }
 
-static ParseRule *_vsatisfy_rule(ParseRule *rule, const ResultWord &input) {
+static ParseRule *_vsatisfy_rule(ParseRule *rule, const ResultWordList &input) {
 	int dep;
 
 	if (!rule->_numSpecials)
@@ -228,11 +231,32 @@ static ParseRule *_vsatisfy_rule(ParseRule *rule, const ResultWord &input) {
 
 	dep = rule->_data[rule->_firstSpecial];
 
-	if (((dep & TOKEN_TERMINAL_CLASS) && ((dep & 0xffff) & input._class)) ||
-			((dep & TOKEN_TERMINAL_GROUP) && ((dep & 0xffff) & input._group))) {
+	int count = 0;
+	int match = 0;
+	ResultWordList::const_iterator iter;
+	// TODO: Inserting an array in the middle of another array is slow
+	Common::Array<int> matches;
+	matches.reserve(input.size());
+
+	// We store the first match in 'match', and any subsequent matches in
+	// 'matches'. 'match' replaces the special in the rule, and 'matches' gets
+	// inserted after it.
+	for (iter = input.begin(); iter != input.end(); ++iter)
+		if (((dep & TOKEN_TERMINAL_CLASS) && ((dep & 0xffff) & iter->_class)) ||
+			((dep & TOKEN_TERMINAL_GROUP) && ((dep & 0xffff) & iter->_group))) {
+			if (count == 0)
+				match = TOKEN_STUFFING_WORD | iter->_group;
+			else
+				matches.push_back(TOKEN_STUFFING_WORD | iter->_group);
+			count++;
+		}
+
+	if (count) {
 		ParseRule *retval = new ParseRule(*rule);
 		++_allocd_rules;
-		retval->_data[rule->_firstSpecial] = TOKEN_STUFFING_WORD | input._group;
+		retval->_data[rule->_firstSpecial] = match;
+		if (count > 1)
+			retval->_data.insert_at(rule->_firstSpecial+1, matches);
 		retval->_numSpecials--;
 		retval->_firstSpecial = 0;
 
@@ -458,6 +482,25 @@ static int _vbpt_terminate(ParseTreeNode *nodes, int *pos, int base, int value)
 	nodes[base].right = 0;
 	return *pos;
 }
+static int _vbpt_append_word(ParseTreeNode *nodes, int *pos, int base, int value) {
+	// writes one value to an existing node and creates a sibling for writing
+	nodes[base].type = kParseTreeWordNode;
+	nodes[base].value = value;
+	nodes[base].right = &nodes[++(*pos)];
+	nodes[*pos].type = kParseTreeBranchNode;
+	nodes[*pos].left = 0;
+	nodes[*pos].right = 0;
+	return *pos;
+}
+
+static int _vbpt_terminate_word(ParseTreeNode *nodes, int *pos, int base, int value) {
+	// Terminates, overwriting a nextwrite forknode
+	nodes[base].type = kParseTreeWordNode;
+	nodes[base].value = value;
+	nodes[base].right = 0;
+	return *pos;
+}
+
 
 static int _vbpt_write_subexpression(ParseTreeNode *nodes, int *pos, ParseRule *rule, uint rulepos, int writepos) {
 	uint token;
@@ -470,11 +513,16 @@ static int _vbpt_write_subexpression(ParseTreeNode *nodes, int *pos, ParseRule *
 			nexttoken = (rulepos < rule->_data.size()) ? rule->_data[rulepos] : TOKEN_CPAREN;
 			if (nexttoken != TOKEN_CPAREN)
 				writepos = _vbpt_parenc(nodes, pos, writepos);
-		} else if (token & TOKEN_STUFFING_WORD) {
+		} else if (token & TOKEN_STUFFING_LEAF) {
 			if (nexttoken == TOKEN_CPAREN)
 				writepos = _vbpt_terminate(nodes, pos, writepos, token & 0xffff);
 			else
 				writepos = _vbpt_append(nodes, pos, writepos, token & 0xffff);
+		} else if (token & TOKEN_STUFFING_WORD) {
+			if (nexttoken == TOKEN_CPAREN)
+				writepos = _vbpt_terminate_word(nodes, pos, writepos, token & 0xffff);
+			else
+				writepos = _vbpt_append_word(nodes, pos, writepos, token & 0xffff);
 		} else {
 			printf("\nError in parser (grammar.cpp, _vbpt_write_subexpression()): Rule data broken in rule ");
 			vocab_print_rule(rule);
@@ -486,16 +534,16 @@ static int _vbpt_write_subexpression(ParseTreeNode *nodes, int *pos, ParseRule *
 	return rulepos;
 }
 
-int Vocabulary::parseGNF(const ResultWordList &words, bool verbose) {
+int Vocabulary::parseGNF(const ResultWordListList &words, bool verbose) {
 	Console *con = g_sci->getSciDebugger();
 	// Get the start rules:
 	ParseRuleList *work = _vocab_clone_rule_list_by_id(_parserRules, _parserBranches[0].data[1]);
 	ParseRuleList *results = NULL;
 	uint word = 0;
 	const uint words_nr = words.size();
-	ResultWordList::const_iterator word_iter = words.begin();
+	ResultWordListList::const_iterator words_iter;
 
-	for (word_iter = words.begin(); word_iter != words.end(); ++word_iter, ++word) {
+	for (words_iter = words.begin(); words_iter != words.end(); ++words_iter, ++word) {
 		ParseRuleList *new_work = NULL;
 		ParseRuleList *reduced_rules = NULL;
 		ParseRuleList *seeker, *subseeker;
@@ -505,8 +553,9 @@ int Vocabulary::parseGNF(const ResultWordList &words, bool verbose) {
 
 		seeker = work;
 		while (seeker) {
-			if (seeker->rule->_numSpecials <= (words_nr - word))
-				reduced_rules = _vocab_add_rule(reduced_rules, _vsatisfy_rule(seeker->rule, *word_iter));
+			if (seeker->rule->_numSpecials <= (words_nr - word)) {
+				reduced_rules = _vocab_add_rule(reduced_rules, _vsatisfy_rule(seeker->rule, *words_iter));
+			}
 
 			seeker = seeker->next;
 		}
diff --git a/engines/sci/parser/vocabulary.cpp b/engines/sci/parser/vocabulary.cpp
index 139787eefc..7159e941d5 100644
--- a/engines/sci/parser/vocabulary.cpp
+++ b/engines/sci/parser/vocabulary.cpp
@@ -166,8 +166,14 @@ bool Vocabulary::loadParserWords() {
 		newWord._class = ((resource->data[seeker]) << 4) | ((c & 0xf0) >> 4);
 		newWord._group = (resource->data[seeker + 2]) | ((c & 0x0f) << 8);
 
-		// Add the word to the list
-		_parserWords[currentWord] = newWord;
+		// SCI01 was the first version to support multiple class/group pairs
+		// per word, so we clear the list in earlier versions
+		// in earlier versions.
+		if (getSciVersion() < SCI_VERSION_01)
+			_parserWords[currentWord].clear();
+
+		// Add this to the list of possible class,group pairs for this word
+		_parserWords[currentWord].push_back(newWord);
 
 		seeker += 3;
 	}
@@ -182,8 +188,9 @@ const char *Vocabulary::getAnyWordFromGroup(int group) {
 		return "{nothing}";
 
 	for (WordMap::const_iterator i = _parserWords.begin(); i != _parserWords.end(); ++i) {
-		if (i->_value._group == group)
-			return i->_key.c_str();
+		for (ResultWordList::const_iterator j = i->_value.begin(); j != i->_value.end(); ++j)
+			if (j->_group == group)
+				return i->_key.c_str();
 	}
 
 	return "{invalid}";
@@ -266,7 +273,9 @@ bool Vocabulary::loadBranches() {
 }
 
 // we assume that *word points to an already lowercased word
-ResultWord Vocabulary::lookupWord(const char *word, int word_len) {
+void Vocabulary::lookupWord(ResultWordList& retval, const char *word, int word_len) {
+	retval.clear();
+
 	Common::String tempword(word, word_len);
 
 	// Remove all dashes from tempword
@@ -278,15 +287,22 @@ ResultWord Vocabulary::lookupWord(const char *word, int word_len) {
 	}
 
 	// Look it up:
-	WordMap::iterator dict_word = _parserWords.find(tempword);
+	WordMap::iterator dict_words = _parserWords.find(tempword);
 
 	// Match found? Return it!
-	if (dict_word != _parserWords.end()) {
-		return dict_word->_value;
+	if (dict_words != _parserWords.end()) {
+		retval = dict_words->_value;
+
+		// SCI01 was the first version to support
+		// multiple matches, so no need to look further
+		// in earlier versions.
+		if (getSciVersion() < SCI_VERSION_01)
+			return;
+
 	}
 
 	// Now try all suffixes
-	for (SuffixList::const_iterator suffix = _parserSuffixes.begin(); suffix != _parserSuffixes.end(); ++suffix)
+	for (SuffixList::const_iterator suffix = _parserSuffixes.begin(); suffix != _parserSuffixes.end(); ++suffix) {
 		if (suffix->alt_suffix_length <= word_len) {
 
 			int suff_index = word_len - suffix->alt_suffix_length;
@@ -299,27 +315,38 @@ ResultWord Vocabulary::lookupWord(const char *word, int word_len) {
 				// ...and append "correct" suffix
 				tempword2 += Common::String(suffix->word_suffix, suffix->word_suffix_length);
 
-				dict_word = _parserWords.find(tempword2);
-
-				if ((dict_word != _parserWords.end()) && (dict_word->_value._class & suffix->class_mask)) { // Found it?
-					// Use suffix class
-					ResultWord tmp = dict_word->_value;
-					tmp._class = suffix->result_class;
-					return tmp;
+				dict_words = _parserWords.find(tempword2);
+
+				if (dict_words != _parserWords.end()) {
+					for (ResultWordList::const_iterator j = dict_words->_value.begin(); j != dict_words->_value.end(); ++j) {
+						if (j->_class & suffix->class_mask) { // Found it?
+							// Use suffix class
+							ResultWord tmp = *j;
+							tmp._class = suffix->result_class;
+							retval.push_back(tmp);
+
+							// SCI01 was the first version to support
+							// multiple matches, so no need to look further
+							// in earlier versions.
+							if (getSciVersion() < SCI_VERSION_01)
+								return;
+						}
+					}
 				}
 			}
 		}
+	}
+
+	if (!retval.empty())
+		return;
 
 	// No match so far? Check if it's a number.
 
-	ResultWord retval = { -1, -1 };
 	char *tester;
 	if ((strtol(tempword.c_str(), &tester, 10) >= 0) && (*tester == '\0')) { // Do we have a complete number here?
 		ResultWord tmp = { VOCAB_CLASS_NUMBER, VOCAB_MAGIC_NUMBER_GROUP };
-		retval = tmp;
+		retval.push_back(tmp);
 	}
-
-	return retval;
 }
 
 void Vocabulary::debugDecipherSaidBlock(const byte *addr) {
@@ -398,7 +425,7 @@ static const byte lowerCaseMap[256] = {
 	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff  // 0xf0
 };
 
-bool Vocabulary::tokenizeString(ResultWordList &retval, const char *sentence, char **error) {
+bool Vocabulary::tokenizeString(ResultWordListList &retval, const char *sentence, char **error) {
 	char currentWord[VOCAB_MAX_WORDLENGTH] = "";
 	int pos_in_sentence = 0;
 	unsigned char c;
@@ -419,10 +446,12 @@ bool Vocabulary::tokenizeString(ResultWordList &retval, const char *sentence, ch
 		else {
 			if (wordLen) { // Finished a word?
 
-				ResultWord lookup_result = lookupWord(currentWord, wordLen);
+				ResultWordList lookup_result;
+
 				// Look it up
+				lookupWord(lookup_result, currentWord, wordLen);
 
-				if (lookup_result._class == -1) { // Not found?
+				if (lookup_result.empty()) { // Not found?
 					*error = (char *)calloc(wordLen + 1, 1);
 					strncpy(*error, currentWord, wordLen); // Set the offending word
 					retval.clear();
@@ -460,12 +489,14 @@ void Vocabulary::printSuffixes() const {
 void Vocabulary::printParserWords() const {
 	Console *con = g_sci->getSciDebugger();
 
-	int j = 0;
+	int n = 0;
 	for (WordMap::iterator i = _parserWords.begin(); i != _parserWords.end(); ++i) {
-		con->DebugPrintf("%4d: %03x [%03x] %20s |", j, i->_value._class, i->_value._group, i->_key.c_str());
-		if (j % 3 == 0)
-			con->DebugPrintf("\n");
-		j++;
+		for (ResultWordList::iterator j = i->_value.begin(); j != i->_value.end(); ++j) {
+			con->DebugPrintf("%4d: %03x [%03x] %20s |", n, j->_class, j->_group, i->_key.c_str());
+			if (n % 3 == 0)
+				con->DebugPrintf("\n");
+			n++;
+		}
 	}
 
 	con->DebugPrintf("\n");
@@ -527,8 +558,13 @@ void _vocab_recursive_ptree_dump(ParseTreeNode *tree, int blanks) {
 	if (rbranch) {
 		if (rbranch->type == kParseTreeBranchNode)
 			_vocab_recursive_ptree_dump(rbranch, blanks);
-		else
+		else {
 			printf("%x", rbranch->value);
+			while (rbranch->right) {
+				rbranch = rbranch->right;
+				printf("/%x", rbranch->value);
+			}
+		}
 	}/* else printf("nil");*/
 }
 
@@ -546,14 +582,15 @@ void Vocabulary::dumpParseTree() {
 	printf("))\n");
 }
 
-void Vocabulary::synonymizeTokens(ResultWordList &words) {
+void Vocabulary::synonymizeTokens(ResultWordListList &words) {
 	if (_synonyms.empty())
 		return; // No synonyms: Nothing to check
 
-	for (ResultWordList::iterator i = words.begin(); i != words.end(); ++i)
-		for (SynonymList::const_iterator sync = _synonyms.begin(); sync != _synonyms.end(); ++sync)
-			if (i->_group == sync->replaceant)
-				i->_group = sync->replacement;
+	for (ResultWordListList::iterator i = words.begin(); i != words.end(); ++i)
+		for (ResultWordList::iterator j = i->begin(); j != i->end(); ++j)
+			for (SynonymList::const_iterator sync = _synonyms.begin(); sync != _synonyms.end(); ++sync)
+				if (j->_group == sync->replaceant)
+					j->_group = sync->replacement;
 }
 
 void Vocabulary::printParserNodes(int num) {
diff --git a/engines/sci/parser/vocabulary.h b/engines/sci/parser/vocabulary.h
index d4df8af715..1b37219bac 100644
--- a/engines/sci/parser/vocabulary.h
+++ b/engines/sci/parser/vocabulary.h
@@ -117,8 +117,9 @@ struct ResultWord {
 };
 
 typedef Common::List<ResultWord> ResultWordList;
+typedef Common::List<ResultWordList> ResultWordListList;
 
-typedef Common::HashMap<Common::String, ResultWord, Common::CaseSensitiveString_Hash, Common::CaseSensitiveString_EqualTo> WordMap;
+typedef Common::HashMap<Common::String, ResultWordList, Common::CaseSensitiveString_Hash, Common::CaseSensitiveString_EqualTo> WordMap;
 
 
 struct ParseRuleList;
@@ -161,7 +162,7 @@ struct ParseTreeNode {
 	ParseTypes type;  /**< leaf or branch */
 	int value; /**< For leaves */
 	ParseTreeNode* left; /**< Left child, for branches */
-	ParseTreeNode* right; /**< Right child, for branches */
+	ParseTreeNode* right; /**< Right child, for branches (and word leaves) */
 };
 
 enum VocabularyVersions {
@@ -186,11 +187,11 @@ public:
 
 	/**
 	 * Looks up a single word in the words and suffixes list.
+	 * @param retval	the list of matches
 	 * @param word		pointer to the word to look up
 	 * @param word_len	length of the word to look up
-	 * @return the matching word (or (-1,-1) if there was no match)
 	 */
-	ResultWord lookupWord(const char *word, int word_len);
+	void lookupWord(ResultWordList &retval, const char *word, int word_len);
 
 
 	/**
@@ -204,7 +205,7 @@ public:
 	 * contain any useful words; if not, *error points to a malloc'd copy of
 	 * the offending word. The returned list may contain anywords.
 	 */
-	bool tokenizeString(ResultWordList &retval, const char *sentence, char **error);
+	bool tokenizeString(ResultWordListList &retval, const char *sentence, char **error);
 
 	/**
 	 * Builds a parse tree from a list of words, using a set of Greibach Normal
@@ -215,7 +216,7 @@ public:
 	 *			nodes or if the sentence structure in 'words' is not part of the
 	 *			language described by the grammar passed in 'rules'.
 	 */
-	int parseGNF(const ResultWordList &words, bool verbose = false);
+	int parseGNF(const ResultWordListList &words, bool verbose = false);
 
 	/**
 	 * Constructs the Greibach Normal Form of the grammar supplied in 'branches'.
@@ -262,9 +263,9 @@ public:
 
 	/**
 	 * Synonymizes a token list
-	 * Parameters: (ResultWordList &) words: The word list to synonymize
+	 * Parameters: (ResultWordListList &) words: The word list to synonymize
 	 */
-	void synonymizeTokens(ResultWordList &words);
+	void synonymizeTokens(ResultWordListList &words);
 
 	void printParserNodes(int num);