1 files changed, 89 insertions, 0 deletions
diff --git a/tests/common/errorfunc.rs b/tests/common/errorfunc.rs
new file mode 100644
index 0000000..99ba641
--- /dev/null
+++ b/tests/common/errorfunc.rs
@@ -0,0 +1,89 @@
+// Copyright (c) 2021 Soni L.
+
+use ::std::marker::PhantomData;
+
+use ::iosonism::strcursor::ReadError;
+use ::iosonism::strcursor::StringReader;
+
+/// An error callback.
+pub trait ErrorFunc<'a, C: StringReader<'a>> {
+    fn call<'b>(context: &C, ty: ErrorType<'b>);
+}
+
+/// An implementation of various Iosonism errors that calls T.
+pub struct ErrorCall<T>(PhantomData<T>);
+
+#[non_exhaustive]
+#[derive(PartialEq, Eq, Debug)]
+pub enum ErrorType<'a> {
+    InvalidInteger(&'a str),
+    ExpectedInteger,
+    InvalidFloat(&'a str),
+    ExpectedFloat,
+    InvalidBool(&'a str),
+    ExpectedBool,
+    ExpectedStartOfQuote,
+    ExpectedEndOfQuote,
+    InvalidEscape(&'a str),
+    ExpectedSymbol(&'a str),
+}
+
+impl<T> ::std::fmt::Display for ErrorCall<T> {
+    fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+        write!(f, "error!")
+    }
+}
+
+impl<T> ::std::fmt::Debug for ErrorCall<T> {
+    fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+        write!(f, "ErrorCall")
+    }
+}
+
+impl<T> ::std::error::Error for ErrorCall<T> {
+}
+
+impl<'a, C: StringReader<'a>, T> ReadError<'a, C> for ErrorCall<T>
+where T: ErrorFunc<'a, C> {
+    fn invalid_integer(context: &C, from: &str) -> Self {
+        T::call(context, ErrorType::InvalidInteger(from));
+        Self(PhantomData)
+    }
+    fn expected_integer(context: &C) -> Self {
+        T::call(context, ErrorType::ExpectedInteger);
+        Self(PhantomData)
+    }
+    fn invalid_float(context: &C, from: &str) -> Self {
+        T::call(context, ErrorType::InvalidFloat(from));
+        Self(PhantomData)
+    }
+    fn expected_float(context: &C) -> Self {
+        T::call(context, ErrorType::ExpectedFloat);
+        Self(PhantomData)
+    }
+    fn invalid_bool(context: &C, from: &str) -> Self {
+        T::call(context, ErrorType::InvalidBool(from));
+        Self(PhantomData)
+    }
+    fn expected_bool(context: &C) -> Self {
+        T::call(context, ErrorType::ExpectedBool);
+        Self(PhantomData)
+    }
+    fn expected_start_of_quote(context: &C) -> Self {
+        T::call(context, ErrorType::ExpectedStartOfQuote);
+        Self(PhantomData)
+    }
+    fn expected_end_of_quote(context: &C) -> Self {
+        T::call(context, ErrorType::ExpectedEndOfQuote);
+        Self(PhantomData)
+    }
+    fn invalid_escape(context: &C, from: &str) -> Self {
+        T::call(context, ErrorType::InvalidEscape(from));
+        Self(PhantomData)
+    }
+    fn expected_symbol(context: &C, from: &str) -> Self {
+        T::call(context, ErrorType::ExpectedSymbol(from));
+        Self(PhantomData)
+    }
+}
+