Going to go back to fn objects in the hope that I don't have to specify lifetimes.

src/parser/text_element_parser.rs

@@ -37,38 +37,13 @@ use nom::IResult;
 //     ))(i)
 // });
 
-pub trait ParserWithContext {
-    fn bind_context<'a, 'c>(
-        &mut self,
-        context: &mut NomContext<'c, &'a str, &'a str, VerboseError<&'a str>>,
-    ) -> Box<dyn FnMut(&'a str) -> IResult<&'a str, TextElement<'a>, VerboseError<&'a str>>>;
-}
-
-impl<F> ParserWithContext for F
-where
-    F: for<'a, 'c> FnMut(
-        &'a str,
-        &mut NomContext<'c, &'a str, &'a str, VerboseError<&'a str>>,
-    ) -> Res<&'a str, TextElement<'a>>,
-{
-    fn bind_context<'c>(
-        &mut self,
-        context: &mut NomContext<'c, &str, &str, VerboseError<&str>>,
-    ) -> Box<
-        (dyn for<'a> FnMut(
-            &'a str,
-        )
-            -> Result<(&'a str, TextElement<'a>), nom::Err<VerboseError<&'a str>>>
-             + 'static),
-    > {
-        Box::new(|i| self(i, context))
-    }
-}
-
-pub fn flat_text_element<'a, 'c>(
+pub fn flat_text_element<'a, F>(
     i: &'a str,
-    context: &mut NomContext<'c, &'a str, &'a str, VerboseError<&'a str>>,
-) -> Res<&'a str, TextElement<'a>> {
+    context: &mut NomContext<F>,
+) -> Res<&'a str, TextElement<'a>>
+where
+    F: for<'b> FnMut(&'b str) -> IResult<&'b str, &'b str, VerboseError<&'b str>>,
+{
     // not(context.fail_matcher)(i)?;
     // todo
     todo!()