1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/rust/nom/tests/custom_errors.rs b/third_party/rust/nom/tests/custom_errors.rs
new file mode 100644
index 0000000000..2021713341
--- /dev/null
+++ b/third_party/rust/nom/tests/custom_errors.rs
@@ -0,0 +1,48 @@
+#![allow(dead_code)]
+
+use nom::bytes::streaming::tag;
+use nom::character::streaming::digit1 as digit;
+use nom::combinator::verify;
+use nom::error::{ErrorKind, ParseError};
+#[cfg(feature = "alloc")]
+use nom::multi::count;
+use nom::sequence::terminated;
+use nom::IResult;
+
+#[derive(Debug)]
+pub struct CustomError(String);
+
+impl<'a> From<(&'a str, ErrorKind)> for CustomError {
+  fn from(error: (&'a str, ErrorKind)) -> Self {
+    CustomError(format!("error code was: {:?}", error))
+  }
+}
+
+impl<'a> ParseError<&'a str> for CustomError {
+  fn from_error_kind(_: &'a str, kind: ErrorKind) -> Self {
+    CustomError(format!("error code was: {:?}", kind))
+  }
+
+  fn append(_: &'a str, kind: ErrorKind, other: CustomError) -> Self {
+    CustomError(format!("{:?}\nerror code was: {:?}", other, kind))
+  }
+}
+
+fn test1(input: &str) -> IResult<&str, &str, CustomError> {
+  //fix_error!(input, CustomError, tag!("abcd"))
+  tag("abcd")(input)
+}
+
+fn test2(input: &str) -> IResult<&str, &str, CustomError> {
+  //terminated!(input, test1, fix_error!(CustomError, digit))
+  terminated(test1, digit)(input)
+}
+
+fn test3(input: &str) -> IResult<&str, &str, CustomError> {
+  verify(test1, |s: &str| s.starts_with("abcd"))(input)
+}
+
+#[cfg(feature = "alloc")]
+fn test4(input: &str) -> IResult<&str, Vec<&str>, CustomError> {
+  count(test1, 4)(input)
+}