1 files changed, 86 insertions, 0 deletions
diff --git a/vendor/ucd-parse/src/error.rs b/vendor/ucd-parse/src/error.rs
new file mode 100644
index 000000000..9dafc4b33
--- /dev/null
+++ b/vendor/ucd-parse/src/error.rs
@@ -0,0 +1,86 @@
+use std::error;
+use std::fmt;
+use std::io;
+use std::path::{Path, PathBuf};
+
+/// Represents any kind of error that can occur while parsing the UCD.
+#[derive(Debug)]
+pub struct Error {
+    pub(crate) kind: ErrorKind,
+    pub(crate) line: Option<u64>,
+    pub(crate) path: Option<PathBuf>,
+}
+
+/// The kind of error that occurred while parsing the UCD.
+#[derive(Debug)]
+pub enum ErrorKind {
+    /// An I/O error.
+    Io(io::Error),
+    /// A generic parse error.
+    Parse(String),
+}
+
+impl Error {
+    /// Create a new parse error from the given message.
+    pub(crate) fn parse(msg: String) -> Error {
+        Error { kind: ErrorKind::Parse(msg), line: None, path: None }
+    }
+
+    /// Return the specific kind of this error.
+    pub fn kind(&self) -> &ErrorKind {
+        &self.kind
+    }
+
+    /// Return the line number at which this error occurred, if available.
+    pub fn line(&self) -> Option<u64> {
+        self.line
+    }
+
+    /// Return the file path associated with this error, if one exists.
+    pub fn path(&self) -> Option<&Path> {
+        self.path.as_ref().map(|p| &**p)
+    }
+
+    /// Unwrap this error into its underlying kind.
+    pub fn into_kind(self) -> ErrorKind {
+        self.kind
+    }
+
+    /// Returns true if and only if this is an I/O error.
+    ///
+    /// If this returns true, the underlying `ErrorKind` is guaranteed to be
+    /// `ErrorKind::Io`.
+    pub fn is_io_error(&self) -> bool {
+        match self.kind {
+            ErrorKind::Io(_) => true,
+            _ => false,
+        }
+    }
+}
+
+impl error::Error for Error {
+    fn cause(&self) -> Option<&dyn error::Error> {
+        match self.kind {
+            ErrorKind::Io(ref err) => Some(err),
+            _ => None,
+        }
+    }
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if let Some(ref path) = self.path {
+            if let Some(line) = self.line {
+                write!(f, "{}:{}: ", path.display(), line)?;
+            } else {
+                write!(f, "{}: ", path.display())?;
+            }
+        } else if let Some(line) = self.line {
+            write!(f, "error on line {}: ", line)?;
+        }
+        match self.kind {
+            ErrorKind::Io(ref err) => write!(f, "{}", err),
+            ErrorKind::Parse(ref msg) => write!(f, "{}", msg),
+        }
+    }
+}