refactor(pcre): drop PcreException

Composer never feeds a pattern that fails to compile at runtime, so a
preg_*() failure is a programming error rather than a recoverable
condition. Replace the PcreException path with a panic.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 0 insertions, 36 deletions

diff --git a/crates/shirabe-external-packages/src/composer/pcre/pcre_exception.rs b/crates/shirabe-external-packages/src/composer/pcre/pcre_exception.rs
deleted file mode 100644
index 4ebe2c3..0000000
--- a/crates/shirabe-external-packages/src/composer/pcre/pcre_exception.rs
+++ /dev/null
@@ -1,36 +0,0 @@
-//! ref: composer/vendor/composer/pcre/src/PcreException.php
-
-use super::preg::{preg_last_error, preg_last_error_msg};
-
-#[derive(Debug)]
-pub struct PcreException(pub shirabe_php_shim::RuntimeException);
-
-impl PcreException {
-    pub fn from_function(function: &str, pattern: &str) -> PcreException {
-        let code = preg_last_error();
-
-        PcreException(shirabe_php_shim::RuntimeException {
-            message: format!(
-                "{}(): failed executing \"{}\": {}",
-                function,
-                pattern,
-                Self::pcre_last_error_message(code)
-            ),
-            code,
-        })
-    }
-
-    // Modern PHP always provides preg_last_error_msg(), so the legacy fallbacks
-    // that scanned the pcre constants are not reproduced.
-    fn pcre_last_error_message(_code: i64) -> String {
-        preg_last_error_msg()
-    }
-}
-
-impl std::fmt::Display for PcreException {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}
-
-impl std::error::Error for PcreException {}