refactor(preg): wrap the preg_* $matches maps in newtypes

The five IndexMap shapes that the preg_* functions and Preg fill in are
now distinct types generated by preg_match_map!, so a matches map no
longer interchanges with any other map of the same key and value type.

Index<usize> is kept alongside Index<&Q> because call sites such as
config_command and event_dispatcher reach for a group by its position in
the map rather than by its capture key.

1 files changed, 1 insertions, 2 deletions

diff --git a/crates/shirabe/src/util/http/response.rs b/crates/shirabe/src/util/http/response.rs
index 47a1593f..6ce52643 100644
--- a/crates/shirabe/src/util/http/response.rs
+++ b/crates/shirabe/src/util/http/response.rs
@@ -65,8 +65,7 @@ impl Response {
         let mut value = None;
         let pattern = format!("{{^{}:\\s*(.+?)\\s*$}}i", preg_quote(name, None));
         for header in headers {
-            let mut matches: indexmap::IndexMap<shirabe_pcre::CaptureKey, String> =
-                indexmap::IndexMap::new();
+            let mut matches = shirabe_pcre::PregMatchedGroups::new();
             if Preg::match3(&pattern, header, Some(&mut matches))
                 && let Some(s) = matches.get(&shirabe_pcre::CaptureKey::ByIndex(1))
             {