refactor(pcre): inline Preg into its call sites and drop the crate

Preg had shed everything it owned: after the last few rounds its methods
were one-line forwards to the shim's preg_*(), differing only in a
default argument or a wrapper the caller unwrapped anyway. The 460 call
sites now name the shim function, and shirabe-pcre is gone from the
workspace along with its LICENSE entry.

The forwards expand as they read: isMatch becomes
preg_match2(.., 0).is_some() (is_none() where PHP negates it), isMatch3
and match3 drop the .is_some(), matchAll counts through
preg_match_all2(..).occurrence_count(), and replace4/replace5 spell out
the limit and count arguments preg_replace2 takes. Callbacks are the one
place the shapes differ: preg_replace_callback carries an error out of
the callback, so the fourteen infallible closures wrap their result in
Ok() and expect() it back.

Config::process() is the fifteenth, and it drops the `error` cell it
captured to smuggle a failure past a closure that could only return a
String. The `?` in the closure now carries it, which is what the PHP
does -- a throw from the callback leaves preg_replace_callback at the
failing match rather than running the remaining replacements and
reporting the last error.

The module doc that explained why composer/pcre's exceptions and
*StrictGroups() variants have no counterpart moves to the shim's preg
module, where the functions it describes live.

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

1 files changed, 5 insertions, 5 deletions

diff --git a/crates/shirabe-class-map-generator/src/php_file_parser.rs b/crates/shirabe-class-map-generator/src/php_file_parser.rs
index e05f4f1a..0ed78c7f 100644
--- a/crates/shirabe-class-map-generator/src/php_file_parser.rs
+++ b/crates/shirabe-class-map-generator/src/php_file_parser.rs
@@ -1,10 +1,10 @@
 //! ref: composer/vendor/composer/class-map-generator/src/PhpFileParser.php
 
 use crate::php_file_cleaner::PhpFileCleaner;
-use shirabe_pcre::{CaptureKey, Preg};
 use shirabe_php_shim::{
-    PHP_EOL, RuntimeException, file_exists, file_get_contents, function_exists, is_file,
-    is_readable, ltrim, php_strip_whitespace, str_replace_array, strrpos, substr, trim,
+    CaptureKey, PHP_EOL, RuntimeException, file_exists, file_get_contents, function_exists,
+    is_file, is_readable, ltrim, php_strip_whitespace, preg_match_all2, str_replace_array, strrpos,
+    substr, trim,
 };
 use std::sync::OnceLock;
 
@@ -58,7 +58,7 @@ impl PhpFileParser {
 
         // return early if there is no chance of matching anything in this file
         let pattern = format!("{{\\b(?:class|interface|trait{})\\s}}i", extra_types);
-        let max_matches = Preg::match_all(&pattern, &contents);
+        let max_matches = preg_match_all2(&pattern, &contents).occurrence_count();
         if max_matches == 0 {
             return Ok(vec![]);
         }
@@ -84,7 +84,7 @@ impl PhpFileParser {
         }}ix",
             et = extra_types
         );
-        let matches = Preg::match_all2(&pattern2, &contents);
+        let matches = preg_match_all2(&pattern2, &contents);
 
         let mut classes = vec![];
         let mut namespace = String::new();