1 files changed, 25 insertions, 2 deletions
diff --git a/src/version.rs b/src/version.rs
index 078927d..ae91149 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -81,11 +81,24 @@ pub struct CompatibilityRule {
     pub os: Option<OSRestriction>
 }
 
+pub trait FeatureMatcher {
+    fn matches(&self, feature: &str) -> bool;
+}
+
+impl<F> FeatureMatcher for F
+where
+    F: Fn(&str) -> bool
+{
+    fn matches(&self, feature: &str) -> bool {
+        self(feature)
+    }
+}
+
 impl CompatibilityRule {
-    pub fn features_match(&self, checker: fn(&str) -> bool) -> bool {
+    pub fn features_match(&self, checker: impl FeatureMatcher) -> bool {
         if let Some(m) = self.features.as_ref() {
             for (feat, expect) in m {
-                if checker(feat) != *expect {
+                if checker.matches(feat) != *expect {
                     return false;
                 }
             }
@@ -206,6 +219,16 @@ pub struct Library {
     pub url: Option<String> // old format
 }
 
+impl LibraryDownloads {
+    pub fn get_download_info(&self, classifier: Option<&str>) -> Option<&DownloadInfo> {
+        if let Some(classifier) = classifier {
+            self.classifiers.as_ref()?.get(classifier)
+        } else {
+            self.artifact.as_ref()
+        }
+    }
+}
+
 #[derive(Deserialize, Debug, Clone)]
 pub struct ClientLogging {
     pub argument: String,