refactor(preg): add preg_is_match for existence-only call sites

The capture groups were discarded at 162 of the preg_match call sites,
which only tested the Option. They now call preg_is_match, which lets the
regex engine skip capture tracking.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/crates/shirabe/src/package/version/version_selector.rs b/crates/shirabe/src/package/version/version_selector.rs
index 91929c40..61435870 100644
--- a/crates/shirabe/src/package/version/version_selector.rs
+++ b/crates/shirabe/src/package/version/version_selector.rs
@@ -16,7 +16,9 @@ use crate::repository::PlatformRepository;
 use crate::repository::RepositoryInterface;
 use crate::repository::RepositorySetInterface;
 use indexmap::IndexMap;
-use shirabe_php_shim::{CmpOp, php_regex, preg_match, preg_replace, strtolower, version_compare};
+use shirabe_php_shim::{
+    CmpOp, php_regex, preg_is_match, preg_replace, strtolower, version_compare,
+};
 use shirabe_semver::constraint::AnyConstraint;
 use shirabe_semver::constraint::SimpleConstraint;
 
@@ -302,7 +304,7 @@ impl VersionSelector {
         let semantic_version_parts: Vec<&str> = version.split('.').collect();
 
         if semantic_version_parts.len() == 4
-            && preg_match(php_regex!(r"{^\d+\D?}"), semantic_version_parts[3]).is_some()
+            && preg_is_match(php_regex!(r"{^\d+\D?}"), semantic_version_parts[3])
         {
             let mut parts: Vec<String> = semantic_version_parts
                 .iter()