3 files changed, 11 insertions, 31 deletions

diff --git a/src/Document.cxx b/src/Document.cxx
index 2c04bbaae..5d9e10c40 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -3143,11 +3143,6 @@ bool MatchOnLines(const Document *doc, const Regex &regexp, const RESearchRange
 		for (size_t co = 0; co < match.size() && co < RESearch::MAXTAG; co++) {
 			search.bopat[co] = match[co].first.Pos();
 			search.eopat[co] = match[co].second.PosRoundUp();
-			const Sci::Position lenMatch = search.eopat[co] - search.bopat[co];
-			search.pat[co].resize(lenMatch);
-			for (Sci::Position iPos = 0; iPos < lenMatch; iPos++) {
-				search.pat[co][iPos] = doc->CharAt(iPos + search.bopat[co]);
-			}
 		}
 	}
 	return matched;
@@ -3304,19 +3299,20 @@ Sci::Position BuiltinRegex::FindText(Document *doc, Sci::Position minPos, Sci::P
 
 const char *BuiltinRegex::SubstituteByPosition(Document *doc, const char *text, Sci::Position *length) {
 	substituted.clear();
-	const DocumentIndexer di(doc, doc->Length());
-	search.GrabMatches(di);
 	for (Sci::Position j = 0; j < *length; j++) {
 		if (text[j] == '\\') {
-			if (text[j + 1] >= '0' && text[j + 1] <= '9') {
-				const unsigned int patNum = text[j + 1] - '0';
-				const Sci::Position len = search.eopat[patNum] - search.bopat[patNum];
-				if (!search.pat[patNum].empty())	// Will be null if try for a match that did not occur
-					substituted.append(search.pat[patNum].c_str(), len);
-				j++;
+			const char chNext = text[++j];
+			if (chNext >= '0' && chNext <= '9') {
+				const unsigned int patNum = chNext - '0';
+				const Sci::Position startPos = search.bopat[patNum];
+				const Sci::Position len = search.eopat[patNum] - startPos;
+				if (len > 0) {	// Will be null if try for a match that did not occur
+					const size_t size = substituted.length();
+					substituted.resize(size + len);
+					doc->GetCharRange(substituted.data() + size, startPos, len);
+				}
 			} else {
-				j++;
-				switch (text[j]) {
+				switch (chNext) {
 				case 'a':
 					substituted.push_back('\a');
 					break;
diff --git a/src/RESearch.cxx b/src/RESearch.cxx
index 98399c925..8fe3724c8 100644
--- a/src/RESearch.cxx
+++ b/src/RESearch.cxx
@@ -264,20 +264,6 @@ RESearch::RESearch(CharClassify *charClassTable) {
 void RESearch::Clear() {
 	bopat.fill(NOTFOUND);
 	eopat.fill(NOTFOUND);
-	for (int i = 0; i < MAXTAG; i++) {
-		pat[i].clear();
-	}
-}
-
-void RESearch::GrabMatches(const CharacterIndexer &ci) {
-	for (unsigned int i = 0; i < MAXTAG; i++) {
-		if ((bopat[i] != NOTFOUND) && (eopat[i] != NOTFOUND)) {
-			const Sci::Position len = eopat[i] - bopat[i];
-			pat[i].resize(len);
-			for (Sci::Position j = 0; j < len; j++)
-				pat[i][j] = ci.CharAt(bopat[i] + j);
-		}
-	}
 }
 
 void RESearch::ChSet(unsigned char c) noexcept {
diff --git a/src/RESearch.h b/src/RESearch.h
index c142441ae..37f210e13 100644
--- a/src/RESearch.h
+++ b/src/RESearch.h
@@ -22,7 +22,6 @@ public:
 	explicit RESearch(CharClassify *charClassTable);
 	// No dynamic allocation so default copy constructor and assignment operator are OK.
 	void Clear();
-	void GrabMatches(const CharacterIndexer &ci);
 	const char *Compile(const char *pattern, Sci::Position length, bool caseSensitive, bool posix) noexcept;
 	int Execute(const CharacterIndexer &ci, Sci::Position lp, Sci::Position endp);
 
@@ -32,7 +31,6 @@ public:
 	using MatchPositions = std::array<Sci::Position, MAXTAG>;
 	MatchPositions bopat;
 	MatchPositions eopat;
-	std::string pat[MAXTAG];
 
 private: