From c7de1ba9f33c6cd54acb9aba96fb2524b29252f8 Mon Sep 17 00:00:00 2001
From: Paul Mucur <mudge@mudge.name>
Date: Tue, 28 Nov 2023 19:16:49 +0000
Subject: [PATCH] Use StringPieces for RE2::Scanner matches

Rather than allocating new strings when consuming matches for
`RE2::Scanner#scan`, use `StringPiece`s (actually `absl::string_view`s
in newer versions of RE2) to refer to the original input string instead.
---
 ext/re2/re2.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/re2/re2.cc b/ext/re2/re2.cc
index 4616971..1815bf3 100644
--- a/ext/re2/re2.cc
+++ b/ext/re2/re2.cc
@@ -359,7 +359,7 @@ static VALUE re2_scanner_scan(VALUE self) {
 
   std::vector<RE2::Arg> argv(c->number_of_capturing_groups);
   std::vector<RE2::Arg*> args(c->number_of_capturing_groups);
-  std::vector<std::string> matches(c->number_of_capturing_groups);
+  std::vector<re2::StringPiece> matches(c->number_of_capturing_groups);
 
   if (c->eof) {
     return Qnil;