diff --git a/src/compiler.rs b/src/compiler.rs
index d27c864..fc227a5 100644
--- a/src/compiler.rs
+++ b/src/compiler.rs
@@ -11,30 +11,25 @@ pub trait Token {
     }
 }
 
-#[cfg_attr(debug_assertions, derive(Default))]
 #[derive(Clone, Copy)]
 pub struct Silence;
 
 impl Token for Silence {}
 
-#[cfg_attr(debug_assertions, derive(Default))]
 #[derive(Clone, Copy)]
 pub struct Marker;
 
 impl Token for Marker {}
 
-#[cfg_attr(debug_assertions, derive(Default))]
 #[derive(Clone, Copy)]
 pub struct Note(pub u8);
 
 impl Token for Note {}
 
-#[cfg_attr(debug_assertions, derive(Default))]
 pub struct VariableChange(pub char, pub Expression);
 
 impl Token for VariableChange {}
 
-#[cfg_attr(debug_assertions, derive(Default))]
 pub struct Loop(pub LoopCount, pub TokenVec);
 
 pub enum LoopCount {
@@ -50,18 +45,16 @@ impl Default for LoopCount {
 
 impl Token for Loop {}
 
-#[cfg_attr(debug_assertions, derive(Default))]
 pub struct Tuplet(pub TokenVec);
 
 impl Token for Tuplet {}
 
-#[cfg_attr(debug_assertions, derive(Default))]
-pub struct Slope(pub VariableChange, pub TokenVec);
+pub struct Slope<'a>(pub &'a VariableChange, pub TokenVec);
 
-impl Token for Slope {}
+impl Token for Slope<'_> {}
 
 #[derive(new)]
-#[cfg_attr(debug_assertions, derive(Debug, Default))]
+#[cfg_attr(debug_assertions, derive(Debug))]
 pub struct Expression {
     pub(crate) instruction: Instruction,
     pub(crate) slab: Slab,
diff --git a/src/parser.rs b/src/parser.rs
index ad2e53b..cd99dd4 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -20,7 +20,9 @@ use nom::{
 };
 use nom_locate::LocatedSpan;
 
-use crate::compiler::{Expression, Loop, LoopCount, Marker, Note, Silence, Token, VariableChange};
+use crate::compiler::{
+    Expression, Loop, LoopCount, Marker, Note, Silence, Slope, Token, Tuplet, VariableChange,
+};
 
 #[derive(Builder)]
 pub struct Parser<'i, 'n, 's, 'v> {
@@ -30,7 +32,7 @@ pub struct Parser<'i, 'n, 's, 'v> {
     variables: &'v [char],
 }
 
-impl<'i, 'n, 's, 'v> Parser<'i, 'n, 's, 'v> {
+impl<'i> Parser<'i, '_, '_, '_> {
     pub fn parse_all(
         &self,
     ) -> Result<Vec<Box<dyn Token>>, Error<nom_locate::LocatedSpan<&'i str>>> {
@@ -41,7 +43,7 @@ impl<'i, 'n, 's, 'v> Parser<'i, 'n, 's, 'v> {
     }
 }
 
-fn token_parser<'a, 'i, 'n, 's, 'v>(
+fn token_parser<'a>(
     parser: &Parser,
 ) -> impl NomParser<
     LocatedSpan<&'a str>,
@@ -62,6 +64,8 @@ fn token_parser<'a, 'i, 'n, 's, 'v>(
             Note::parser(parser.notes).map(into_box),
             VariableChange::parser(parser.variables).map(into_box),
             Loop::parser(parser).map(into_box),
+            Tuplet::parser(parser).map(into_box),
+            Slope::parser(parser).map(into_box),
         )),
         space_or_comment(),
     ))
@@ -132,9 +136,9 @@ impl VariableChange {
 }
 
 impl Loop {
-    fn parser<'a, 'i, 'n, 's, 'v>(
+    fn parser<'i, 'n, 's, 'v>(
         parser: &Parser<'i, 'n, 's, 'v>,
-    ) -> impl Fn(LocatedSpan<&str>) -> TokenResult<Loop> {
+    ) -> impl Fn(LocatedSpan<&str>) -> TokenResult<Self> {
         |input| {
             delimited(
                 char('('),
@@ -151,6 +155,56 @@ impl Loop {
     }
 }
 
+impl Tuplet {
+    fn parser<'i, 'n, 's, 'v>(
+        parser: &Parser<'i, 'n, 's, 'v>,
+    ) -> impl Fn(LocatedSpan<&str>) -> TokenResult<Self> {
+        |input| {
+            delimited(char('['), token_parser(parser), char(']'))
+                .map(Self)
+                .parse(input)
+        }
+    }
+}
+
+impl<'s> Slope<'s> {
+    fn parser<'a, 'i, 'n, 'v>(
+        parser: &Parser<'i, 'n, 's, 'v>,
+    ) -> impl Fn(LocatedSpan<&'a str>) -> TokenResult<'a, Self> {
+        |input| {
+            delimited(
+                char('{'),
+                alt(
+                    parser
+                        .slopes
+                        .iter()
+                        .map(|(k, v)| {
+                            Box::new(move |input: LocatedSpan<&'a str>| {
+                                value(v, tag(k.as_str())).parse(input)
+                            })
+                                as Box<
+                                    dyn Fn(
+                                        LocatedSpan<&'a str>,
+                                    )
+                                        -> TokenResult<'a, &'s VariableChange>,
+                                >
+                        })
+                        .collect::<Vec<
+                            Box<
+                                dyn Fn(LocatedSpan<&'a str>) -> TokenResult<'a, &'s VariableChange>,
+                            >,
+                        >>()
+                        .as_mut_slice(),
+                )
+                .and(token_parser(parser)),
+                char('}'),
+            )
+            .map(|(i, v)| Self(i, v))
+            .parse(input)
+        }
+    }
+}
+
 /// Will return the longest valid fasteval expression
 fn expression_parser<C: Into<char> + Ord + Display>(
     variables: &[C],