refactor(preg): split PregMatches reads into get() and name()

PregMatches keyed both forms of a capture group through CaptureKey, so
every read built one: a usize wrapped in an enum, or worse, a String
allocated to name a group that regex::Captures can look up from a &str.
It now mirrors regex::Captures instead -- get() takes the group number,
name() the group name -- and the enum drops out of the type entirely.

That is 285 call sites across 59 files, and the named ones carry most of
the win: `matches.get(&CaptureKey::ByName("host".to_string()))` reads as
`matches.name("host")`. ProcessExecutor loses a `user_key` binding that
existed only to build the key once.

CaptureKey stays as the key type of PregMatchesAll and
PregMatchesAllWithOffsets, where numbered and named entries share one
IndexMap and a key type is the point. Five files still name it.

Also retargets the two preg_match_all comments that described the
occurrence count through `matches[&CaptureKey::ByIndex(0)].len()`, an
Index impl these types no longer carry.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 5 insertions, 24 deletions

diff --git a/crates/shirabe/src/event_dispatcher/event_dispatcher.rs b/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
index 8617ba8f..fd4b4663 100644
--- a/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
+++ b/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
@@ -21,7 +21,7 @@ use crate::script::Event as ScriptEvent;
 use crate::util::Platform;
 use crate::util::ProcessExecutor;
 use indexmap::IndexMap;
-use shirabe_pcre::{CaptureKey, Preg};
+use shirabe_pcre::Preg;
 use shirabe_php_rpc::{
     PhpThrow, PluginValue, RustMethodDispatcher, RustObjHandle, call_function,
     call_function_with_dispatcher, call_php_method, call_static_method,
@@ -956,13 +956,7 @@ try {{
                             if Platform::is_windows() {
                                 path_and_args = Preg::replace_callback(
                                     php_regex!("{^\\S+}"),
-                                    |m| {
-                                        str_replace(
-                                            "/",
-                                            "\\",
-                                            m.get(&CaptureKey::ByIndex(0)).unwrap(),
-                                        )
-                                    },
+                                    |m| str_replace("/", "\\", m.get(0).unwrap()),
                                     &path_and_args,
                                 );
                             }
@@ -971,10 +965,7 @@ try {{
                             if let Some(m) =
                                 Preg::is_match3(php_regex!("{^[^\\'\"\\s/\\\\]+}"), &path_and_args)
                             {
-                                let m0 = m
-                                    .get(&CaptureKey::ByIndex(0))
-                                    .unwrap_or_default()
-                                    .to_string();
+                                let m0 = m.get(0).unwrap_or_default().to_string();
                                 if !file_exists(&m0) {
                                     let finder = ExecutableFinder::new();
                                     if let Some(path_to_exec) = finder.find(&m0, None, &[]) {
@@ -993,11 +984,7 @@ try {{
                                         path_and_args = format!(
                                             "{}{}",
                                             path_to_exec,
-                                            substr(
-                                                &path_and_args,
-                                                strlen(m.get(&CaptureKey::ByIndex(0)).unwrap()),
-                                                None
-                                            )
+                                            substr(&path_and_args, strlen(m.get(0).unwrap()), None)
                                         );
                                     }
                                 }
@@ -1013,13 +1000,7 @@ try {{
                             if Platform::is_windows() {
                                 exec = Preg::replace_callback(
                                     php_regex!("{^\\S+}"),
-                                    |m| {
-                                        str_replace(
-                                            "/",
-                                            "\\",
-                                            m.get(&CaptureKey::ByIndex(0)).unwrap(),
-                                        )
-                                    },
+                                    |m| str_replace("/", "\\", m.get(0).unwrap()),
                                     &exec,
                                 );
                             }