Make GroupsPathError and MetadataRetrievalError enums non-exhaustive

cpp/src/error.rs

@@ -140,7 +140,7 @@ impl From<GroupsPathError> for VerboseError {
         match value {
             GroupsPathError::UndefinedGroup(g) => Self::UndefinedGroupError(g),
             GroupsPathError::CycleFound(cycle) => Self::CyclicInteractionError(cycle),
-            GroupsPathError::PathfindingError(_) => Self::Other(Box::new(value)),
+            GroupsPathError::PathfindingError(_) | _ => Self::Other(Box::new(value)),
         }
     }
 }
@@ -149,7 +149,7 @@ impl From<MetadataRetrievalError> for VerboseError {
     fn from(value: MetadataRetrievalError) -> Self {
         match value {
             MetadataRetrievalError::ConditionEvaluationError(e) => e.into(),
-            MetadataRetrievalError::RegexError(_) => Self::Other(Box::new(value)),
+            MetadataRetrievalError::RegexError(_) | _ => Self::Other(Box::new(value)),
         }
     }
 }

python/src/error.rs

@@ -68,7 +68,7 @@ impl From<GroupsPathError> for VerboseError {
         match value {
             GroupsPathError::UndefinedGroup(g) => Self::UndefinedGroupError(g),
             GroupsPathError::CycleFound(cycle) => Self::CyclicInteractionError(cycle),
-            GroupsPathError::PathfindingError(_) => Self::Other(Box::new(value)),
+            GroupsPathError::PathfindingError(_) | _ => Self::Other(Box::new(value)),
         }
     }
 }

src/database/error.rs

@@ -24,6 +24,7 @@ impl From<loot_condition_interpreter::Error> for ConditionEvaluationError {
 
 /// Represents an error that occurred while retrieving metadata for a plugin.
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum MetadataRetrievalError {
     ConditionEvaluationError(ConditionEvaluationError),
     RegexError(RegexError),

src/sorting/error.rs

@@ -66,6 +66,7 @@ pub(crate) fn display_cycle(cycle: &[Vertex]) -> String {
 /// Represents an error that occurred while trying to get the path between two
 /// groups across the graph formed from group metadata.
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum GroupsPathError {
     UndefinedGroup(String),
     CycleFound(Vec<Vertex>),