diff --git a/src/ast/basic.rs b/src/ast/basic.rs
index 9790f8c..5056f21 100644
--- a/src/ast/basic.rs
+++ b/src/ast/basic.rs
@@ -77,26 +77,6 @@ impl HasSpan for Ident {
     }
 }
 
-#[derive(Debug, Clone)]
-pub enum Separated<E, S1, S2> {
-    Empty(Span),
-    NonEmpty {
-        first_elem: E,
-        last_elems: Vec<(S1, E)>,
-        trailing: Option<S2>,
-        span: Span,
-    },
-}
-
-impl<E, S1, S2> HasSpan for Separated<E, S1, S2> {
-    fn span(&self) -> Span {
-        match self {
-            Self::Empty(span) => *span,
-            Self::NonEmpty { span, .. } => *span,
-        }
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct BoundedSeparated<E> {
     pub elems: Vec<(Space, E, Space)>,
diff --git a/src/desugar/basic.rs b/src/desugar/basic.rs
index 1b0f4fc..156445f 100644
--- a/src/desugar/basic.rs
+++ b/src/desugar/basic.rs
@@ -1,39 +1,4 @@
-use crate::ast::{BoundedSeparated, Separated};
-
-impl<E, S1, S2> Separated<E, S1, S2> {
-    pub fn desugar_elem(self, desugar_elem: impl Fn(E) -> (E, bool)) -> (Self, bool) {
-        match self {
-            Self::Empty(span) => (Self::Empty(span), false),
-
-            Self::NonEmpty {
-                first_elem,
-                last_elems,
-                trailing,
-                span,
-            } => {
-                let (new_first_elem, mut desugared) = desugar_elem(first_elem);
-                let mut new_last_elems = vec![];
-                for (separator, elem) in last_elems {
-                    if desugared {
-                        new_last_elems.push((separator, elem));
-                    } else {
-                        let (elem, elem_desugared) = desugar_elem(elem);
-                        desugared = desugared || elem_desugared;
-                        new_last_elems.push((separator, elem));
-                    }
-                }
-
-                let new = Self::NonEmpty {
-                    first_elem: new_first_elem,
-                    last_elems: new_last_elems,
-                    trailing,
-                    span,
-                };
-                (new, desugared)
-            }
-        }
-    }
-}
+use crate::ast::BoundedSeparated;
 
 impl<E> BoundedSeparated<E> {
     pub fn desugar(self, desugar_elem: impl Fn(E) -> (E, bool)) -> (Self, bool) {
diff --git a/src/parser/basic.rs b/src/parser/basic.rs
index 2c8254d..9ca8d09 100644
--- a/src/parser/basic.rs
+++ b/src/parser/basic.rs
@@ -3,7 +3,7 @@
 use chumsky::prelude::*;
 use chumsky::text::Character;
 
-use crate::ast::{BoundedSeparated, Ident, Line, Separated, Space};
+use crate::ast::{BoundedSeparated, Ident, Line, Space};
 use crate::span::Span;
 
 pub type Error = Simple<char, Span>;
@@ -62,27 +62,6 @@ pub fn local(space: EParser<Space>) -> EParser<Option<Space>> {
 // This function is more of a utility function. Because of this and to keep the
 // code nicer, I have decided that the rules specified in the `parser` module
 // don't apply to it.
-pub fn separated_by<E: 'static, S1: 'static, S2: 'static>(
-    elem: impl Parser<char, E, Error = Error> + Clone + 'static,
-    separator: impl Parser<char, S1, Error = Error> + 'static,
-    trailing_separator: impl Parser<char, S2, Error = Error> + 'static,
-) -> EParser<Separated<E, S1, S2>> {
-    elem.clone()
-        .then(separator.then(elem).repeated())
-        .then(trailing_separator.or_not())
-        .or_not()
-        .map_with_span(|s, span| match s {
-            Some(((first_elem, last_elems), trailing)) => Separated::NonEmpty {
-                first_elem,
-                last_elems,
-                trailing,
-                span,
-            },
-            None => Separated::Empty(span),
-        })
-        .boxed()
-}
-
 pub fn bounded_separated<E: 'static>(
     space: impl Parser<char, Space, Error = Error> + Clone + 'static,
     start: impl Parser<char, (), Error = Error> + 'static,
diff --git a/src/pretty/basic.rs b/src/pretty/basic.rs
index 5d4ae8e..632007c 100644
--- a/src/pretty/basic.rs
+++ b/src/pretty/basic.rs
@@ -1,6 +1,6 @@
 use pretty::{DocAllocator, DocBuilder, Pretty};
 
-use crate::ast::{BoundedSeparated, Ident, Separated};
+use crate::ast::{BoundedSeparated, Ident};
 
 use super::NEST_DEPTH;
 
@@ -10,44 +10,6 @@ impl<'a, D: DocAllocator<'a>> Pretty<'a, D> for Ident {
     }
 }
 
-impl<E, S1, S2> Separated<E, S1, S2> {
-    pub fn pretty<'a, D, FE, FS1, FS2>(
-        self,
-        allocator: &'a D,
-        elem_to_doc: FE,
-        separator_to_doc: FS1,
-        trailing_separator_to_doc: FS2,
-    ) -> DocBuilder<'a, D>
-    where
-        D: DocAllocator<'a>,
-        FE: Fn(E) -> DocBuilder<'a, D>,
-        FS1: Fn(S1) -> DocBuilder<'a, D>,
-        FS2: Fn(S2) -> DocBuilder<'a, D>,
-    {
-        match self {
-            Self::Empty(_) => allocator.nil(),
-            Self::NonEmpty {
-                first_elem,
-                last_elems,
-                trailing,
-                span: _span,
-            } => elem_to_doc(first_elem)
-                .append(
-                    allocator.concat(
-                        last_elems
-                            .into_iter()
-                            .map(|(s, e)| separator_to_doc(s).append(elem_to_doc(e))),
-                    ),
-                )
-                .append(
-                    trailing
-                        .map(trailing_separator_to_doc)
-                        .unwrap_or_else(|| allocator.nil()),
-                ),
-        }
-    }
-}
-
 impl<E> BoundedSeparated<E> {
     pub fn pretty<'a, D, FE>(
         self,