3 files changed, 28 insertions, 1 deletions
diff --git a/crates/shirabe-semver/src/constraint/constraint.rs b/crates/shirabe-semver/src/constraint/constraint.rs
index d64c0a0..4ac4cda 100644
--- a/crates/shirabe-semver/src/constraint/constraint.rs
+++ b/crates/shirabe-semver/src/constraint/constraint.rs
@@ -387,6 +387,18 @@ impl ConstraintInterface for Constraint {
     fn as_any(&self) -> &dyn std::any::Any {
         self
     }
+
+    fn is_constraint(&self) -> bool {
+        true
+    }
+
+    fn get_operator(&self) -> &'static str {
+        Self::trans_op_int(self.operator)
+    }
+
+    fn get_version(&self) -> &str {
+        &self.version
+    }
 }
 
 impl std::fmt::Display for Constraint {
diff --git a/crates/shirabe-semver/src/constraint/constraint_interface.rs b/crates/shirabe-semver/src/constraint/constraint_interface.rs
index 09536e6..f4bd905 100644
--- a/crates/shirabe-semver/src/constraint/constraint_interface.rs
+++ b/crates/shirabe-semver/src/constraint/constraint_interface.rs
@@ -22,6 +22,21 @@ pub trait ConstraintInterface: std::fmt::Debug {
         false
     }
 
+    /// Rust-specific helper: PHP `$c instanceof Constraint` check.
+    fn is_constraint(&self) -> bool {
+        false
+    }
+
+    /// Rust-specific helper: PHP `$c->getOperator()`. Only meaningful when `is_constraint()` is true.
+    fn get_operator(&self) -> &'static str {
+        ""
+    }
+
+    /// Rust-specific helper: PHP `$c->getVersion()`. Only meaningful when `is_constraint()` is true.
+    fn get_version(&self) -> &str {
+        ""
+    }
+
     fn clone_box(&self) -> Box<dyn ConstraintInterface>;
 
     fn as_any(&self) -> &dyn std::any::Any;
diff --git a/crates/shirabe-semver/src/version_parser.rs b/crates/shirabe-semver/src/version_parser.rs
index 359beec..39000e7 100644
--- a/crates/shirabe-semver/src/version_parser.rs
+++ b/crates/shirabe-semver/src/version_parser.rs
@@ -20,7 +20,7 @@ const MODIFIER_REGEX: &str =
 
 const STABILITIES_REGEX: &str = "stable|RC|beta|alpha|dev";
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct VersionParser;
 
 impl VersionParser {