1 files changed, 29 insertions, 0 deletions
diff --git a/third_party/rust/unic-langid-impl/src/errors.rs b/third_party/rust/unic-langid-impl/src/errors.rs
new file mode 100644
index 0000000000..ec054b1867
--- /dev/null
+++ b/third_party/rust/unic-langid-impl/src/errors.rs
@@ -0,0 +1,29 @@
+use super::parser::ParserError;
+use std::error::Error;
+use std::fmt::{self, Display};
+
+/// Enum with errors that can be returned by LanguageIdentifier.
+#[derive(Debug, PartialEq)]
+pub enum LanguageIdentifierError {
+    /// An unknown error - currently covers all-but parser errors.
+    Unknown,
+    /// A parser error.
+    ParserError(ParserError),
+}
+
+impl From<ParserError> for LanguageIdentifierError {
+    fn from(error: ParserError) -> LanguageIdentifierError {
+        LanguageIdentifierError::ParserError(error)
+    }
+}
+
+impl Error for LanguageIdentifierError {}
+
+impl Display for LanguageIdentifierError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            LanguageIdentifierError::Unknown => write!(f, "Unknown error"),
+            LanguageIdentifierError::ParserError(p) => write!(f, "Parser error: {}", p),
+        }
+    }
+}