Add support for named captures to the regex impl and regex highlighter

ECMAScript is adding support for it, and it is a pretty isolated
change to do.

Fixes #2293

1 files changed, 7 insertions, 0 deletions

diff --git a/src/regex.cc b/src/regex.cc
index 970721c7..389b2376 100644
--- a/src/regex.cc
+++ b/src/regex.cc
@@ -1,4 +1,5 @@
 #include "regex.hh"
+#include "ranges.hh"
 
 namespace Kakoune
 {
@@ -8,6 +9,12 @@ Regex::Regex(StringView re, RegexCompileFlags flags)
       m_str{re.str()}
 {}
 
+int Regex::named_capture_index(StringView name) const
+{
+    auto it = find_if(m_impl->named_captures, [&](auto& c) { return c.name == name; });
+    return it != m_impl->named_captures.end() ? it->index : -1;
+}
+
 String option_to_string(const Regex& re)
 {
     return re.str();