Merge branch 'custom_error' into context_many_till

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>(pub 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 +5,15 @@ use nom::combinator::not;
 use nom::error::VerboseError;
 use nom::IResult;
 
+use super::error::CustomError;
+use super::error::MyError;
 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 +46,7 @@ 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 {
@@ -64,12 +64,12 @@ impl<'r, 's> ContextTree<'r, 's> {
                             if local_result.is_ok() {
                                 return local_result;
                             }
-                            // TODO: Make this a custom error
-                            not(take(0usize))(i)?;
+                            // TODO: Make this a specific error instead of just a generic MyError
+                            return Err(nom::Err::Error(CustomError::MyError(MyError("NoExit"))));
                         }
                         ChainBehavior::IgnoreParent(None) => {
-                            // TODO: Make this a custom error
-                            not(take(0usize))(i)?;
+                            // TODO: Make this a specific error instead of just a generic MyError
+                            return Err(nom::Err::Error(CustomError::MyError(MyError("NoExit"))));
                         }
                     };
                 }
@@ -78,9 +78,8 @@ impl<'r, 's> ContextTree<'r, 's> {
                 ContextElement::Context(_) => {}
             };
         }
-        // TODO: Make this a custom error
-        not(take(0usize))(i)?;
-        unreachable!()
+        // TODO: Make this a specific error instead of just a generic MyError
+        return Err(nom::Err::Error(CustomError::MyError(MyError("NoExit"))));
     }
 }
 

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

@@ -2,6 +2,8 @@
 use crate::parser::parser_with_context::parser_with_context;
 use crate::parser::text::paragraph_end;
 
+use super::error::CustomError;
+use super::error::MyError;
 use super::nom_context::ChainBehavior;
 use super::nom_context::ContextElement;
 use super::nom_context::ContextTree;
@@ -32,6 +34,7 @@ use nom::combinator::peek;
 use nom::combinator::recognize;
 use nom::error::ErrorKind;
 use nom::error::ParseError;
+use nom::error::VerboseError;
 use nom::multi::many1;
 use nom::multi::many_till;
 use nom::sequence::tuple;
@@ -180,9 +183,8 @@ pub fn context_bold_start<'s, 'r>(
     if can_start_bold(context) {
         recognize(bold_start)(input)
     } else {
-        // TODO: Make this a custom error
-        not(take(0usize))(input)?;
-        unreachable!()
+        // TODO: Make this a specific error instead of just a generic MyError
+        return Err(nom::Err::Error(CustomError::MyError(MyError("Cannot start bold"))));
     }
 }