Vendor things

third-party/vendor/winnow/examples/custom_error.rs

@@ -0,0 +1,40 @@
+use winnow::error::ErrMode;
+use winnow::error::ErrorKind;
+use winnow::error::ParserError;
+use winnow::prelude::*;
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum CustomError<I> {
+    MyError,
+    Nom(I, ErrorKind),
+}
+
+impl<I: Clone> ParserError<I> for CustomError<I> {
+    fn from_error_kind(input: &I, kind: ErrorKind) -> Self {
+        CustomError::Nom(input.clone(), kind)
+    }
+
+    fn append(self, _: &I, _: ErrorKind) -> Self {
+        self
+    }
+}
+
+pub fn parse<'s>(_input: &mut &'s str) -> PResult<&'s str, CustomError<&'s str>> {
+    Err(ErrMode::Backtrack(CustomError::MyError))
+}
+
+fn main() {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let err = parse.parse_next(&mut "").unwrap_err();
+        match err {
+            ErrMode::Backtrack(e) => assert_eq!(e, CustomError::MyError),
+            _ => panic!("Unexpected error: {:?}", err),
+        }
+    }
+}