Custom error seems to be working.

src/parser/error.rs

@@ -0,0 +1,32 @@
+use nom::bytes::complete::tag;
+use nom::error::ErrorKind;
+use nom::error::ParseError;
+use nom::error::VerboseError;
+use nom::IResult;
+
+#[derive(Debug, PartialEq)]
+pub enum CustomError<I> {
+    MyError(MyError<I>),
+    Nom(I, ErrorKind),
+}
+
+#[derive(Debug, PartialEq)]
+pub struct MyError<I>(I);
+
+impl<I> ParseError<I> for CustomError<I> {
+    fn from_error_kind(input: I, kind: ErrorKind) -> Self {
+        CustomError::Nom(input, kind)
+    }
+
+    fn append(input: I, kind: ErrorKind, mut other: Self) -> Self {
+        // Doesn't do append like VerboseError
+        other
+    }
+}
+
+// Err(nom::Err::Error(nom::error::Error::from_error_kind(input, nom::error::ErrorKind::Char)))
+
+fn test_parser<'a>(i: &'a str) -> IResult<&'a str, &'a str, CustomError<&'a str>> {
+    Err(nom::Err::Error(CustomError::MyError(MyError(i))))?;
+    tag("sdjfisdfjisudfjuwiefweufefefjwef")(i)
+}

src/parser/mod.rs

@@ -1,3 +1,4 @@
+mod error;
 mod list;
 mod nom_context;
 mod parser_with_context;

src/parser/nom_context.rs

@@ -5,15 +5,14 @@ use nom::combinator::not;
 use nom::error::VerboseError;
 use nom::IResult;
 
+use super::error::CustomError;
 use super::list::List;
 use super::list::Node;
 use super::token::Token;
 use super::Context;
 
-type Matcher = dyn for<'r, 's> Fn(
-    Context<'r, 's>,
-    &'s str,
-) -> IResult<&'s str, &'s str, VerboseError<&'s str>>;
+type Matcher =
+    dyn for<'r, 's> Fn(Context<'r, 's>, &'s str) -> IResult<&'s str, &'s str, CustomError<&'s str>>;
 
 #[derive(Debug, Clone)]
 pub struct ContextTree<'r, 's> {
@@ -46,7 +45,7 @@ impl<'r, 's> ContextTree<'r, 's> {
     pub fn check_exit_matcher(
         &'r self,
         i: &'s str,
-    ) -> IResult<&'s str, &'s str, VerboseError<&'s str>> {
+    ) -> IResult<&'s str, &'s str, CustomError<&'s str>> {
         for current_node in self.iter() {
             let context_element = current_node.get_data();
             match context_element {

src/parser/text.rs

@@ -25,7 +25,10 @@ use nom::multi::many_till;
 use nom::sequence::tuple;
 use nom::IResult;
 
-pub type Res<T, U> = IResult<T, U, VerboseError<T>>;
+use super::error::CustomError;
+
+pub type Res<T, U> = IResult<T, U, CustomError<T>>;
+pub type ResOld<T, U> = IResult<T, U, VerboseError<T>>;
 
 #[derive(Debug)]
 pub enum TextElement<'a> {

src/parser/text_element_parser.rs

@@ -275,31 +275,3 @@ fn flat_link<'s, 'r>(context: Context<'r, 's>, i: &'s str) -> Res<&'s str, Link<
     let ret = Link { contents: captured };
     Ok((remaining, ret))
 }
-
-#[derive(Debug, PartialEq)]
-pub enum CustomError<I> {
-  MyError(MyError<I>),
-  Nom(I, ErrorKind),
-}
-
-#[derive(Debug, PartialEq)]
-pub struct MyError<I>(I);
-
-impl<I> ParseError<I> for CustomError<I> {
-    fn from_error_kind(input: I, kind: ErrorKind) -> Self {
-        CustomError::Nom(input, kind)
-    }
-
-    fn append(input: I, kind: ErrorKind, mut other: Self) -> Self {
-        // Doesn't do append like VerboseError
-        other
-    }
-}
-
-// Err(nom::Err::Error(nom::error::Error::from_error_kind(input, nom::error::ErrorKind::Char)))
-
-
-fn test_parser<'a>(i: &'a str) -> IResult<&'a str, &'a str, CustomError<&'a str>> {
-    Err(nom::Err::Error(CustomError::MyError(MyError(i))))?;
-    tag("sdjfisdfjisudfjuwiefweufefefjwef")(i)
-}