diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..79ff1886
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,11 @@
+# Changelog
+
+## 0.2.32
+
+- Added the built-in `Tree` datatype.
+- Added `![]` and `!` syntax for `Tree` literals.
+- Moved the builtins documentation to `/docs`.
+- Created the changelog.
+
+## 0.2.0
+- Initial public release of Bend.
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index 0ebf5e72..d10d2ccb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -62,7 +62,7 @@ dependencies = [
 
 [[package]]
 name = "bend-lang"
-version = "0.2.31"
+version = "0.2.32"
 dependencies = [
  "TSPL",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index bd0bd761..e82f7852 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "bend-lang"
 description = "A high-level, massively parallel programming language"
 license = "Apache-2.0"
-version = "0.2.31"
+version = "0.2.32"
 edition = "2021"
 rust-version = "1.74"
 exclude = ["tests/"]
diff --git a/FEATURES.md b/FEATURES.md
index 00835dbc..42438c4e 100644
--- a/FEATURES.md
+++ b/FEATURES.md
@@ -414,7 +414,7 @@ Other features are described in the following documentation files:
 - 📗 Data types: [Defining data types](docs/defining-data-types.md)
 - 📗 Pattern matching: [Pattern matching](docs/pattern-matching.md)
 - 📗 Native numbers and operations: [Native numbers](docs/native-numbers.md)
-- 📗 Builtin definitions: _Documentation coming soon_
+- 📗 Builtin definitions: [Builtins](docs/builtins.md)
 - 📗 CLI arguments: [CLI arguments](docs/cli-arguments.md)
 - 📙 Duplications and superpositions: [Dups and sups](docs/dups-and-sups.md)
 - 📙 Scopeless lambdas: [Using scopeless lambdas](docs/using-scopeless-lambdas.md)
diff --git a/GUIDE.md b/GUIDE.md
index 4eac58ae..0af1c02e 100644
--- a/GUIDE.md
+++ b/GUIDE.md
@@ -309,8 +309,8 @@ Let's start by implementing a recursive datatype in Bend:
 
 ```python
 type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
+  Node { ~left, ~right }
+  Leaf { value }
 ```
 
 This defines a binary tree, with elements on leaves. Here, `~` flags a field as
@@ -326,18 +326,18 @@ Could be represented as:
 
 ```
 tree = Tree/Node {
-  lft: Tree/Node { lft: Tree/Leaf { val: 1 }, rgt: Tree/Leaf { val: 2 } },
-  rgt: Tree/Node { lft: Tree/Leaf { val: 3 }, rgt: Tree/Leaf { val: 4 } }
+  lft: Tree/Node { left: Tree/Leaf { val: 1 }, right: Tree/Leaf { val: 2 } },
+  rgt: Tree/Node { left: Tree/Leaf { val: 3 }, right: Tree/Leaf { val: 4 } }
 }
 ```
 
-That's ugly. Very soon, we'll add a syntax sugar to make this shorter:
-
+Binary trees are so useful in Bend that this type is already pre-defined in the
+language and has its own dedicated syntax:
+```py
+# ![a, b] => Equivalent to Tree/Node { left: a, right: b }
+# !x      => Equivalent to Tree/Leaf { value: x }
+tree = ![![!1, !2],![!3, !4]]
 ```
-tree = ![![1,2],![3,4]]
-```
-
-As usual, for now, we'll live with the longer version.
 
 ### Fold: consuming recursive datatypes
 
@@ -348,27 +348,20 @@ and replace* for datatypes. For example, consider the code below:
 
 
 ```python
-type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
-
 def sum(tree):
   fold tree:
     case Tree/Node:
-      return tree.lft + tree.rgt
+      return tree.left + tree.right
     case Tree/Leaf:
-      return tree.val
+      return tree.value
 
 def main:
-  tree = Tree/Node {
-    lft: Tree/Node { lft: Tree/Leaf { val: 1 }, rgt: Tree/Leaf { val: 2 } },
-    rgt: Tree/Node { lft: Tree/Leaf { val: 3 }, rgt: Tree/Leaf { val: 4 } }
-  }
+  tree = ![![!1, !2],![!3, !4]]
   return sum(tree)
 ```
 
-It accomplishes the task by replacing every `Tree/Node { lft, rgt }` by `lft +
-rgt`, and replacing every `Tree/Leaf` by `val`. As a result, the entire "tree of
+It accomplishes the task by replacing every `Tree/Node { left, right }` by `left +
+right`, and replacing every `Tree/Leaf` by `value`. As a result, the entire "tree of
 values" is turned into a "tree of additions", and it evaluates as follows:
 
 ```python
@@ -384,26 +377,16 @@ implemented with a fold*. So, we can do much more than just compute an
 into a tuple of `(index,value)`, returning a new tree. Here's how to do it:
 
 ```python
-type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
-
 def enum(tree):
   idx = 0
   fold tree with idx:
     case Tree/Node:
-      return Tree/Node {
-        lft: tree.lft(idx * 2 + 0),
-        rgt: tree.rgt(idx * 2 + 1),
-      }
+      return ![tree.left(idx * 2 + 0), tree.right(idx * 2 + 1)]
     case Tree/Leaf:
-      return Tree/Leaf { val: (idx, tree.val) }
+      return !(idx, tree.value)
 
 def main:
-  tree = Tree/Node {
-    lft: Tree/Node { lft: Tree/Leaf { val: 1 }, rgt: Tree/Leaf { val: 2 }, },
-    rgt: Tree/Node { lft: Tree/Leaf { val: 3 }, rgt: Tree/Leaf { val: 4 }, }
-  }
+  tree = ![![!1, !2],![!3, !4]]
   return enum(tree)
 ```
 
@@ -440,16 +423,12 @@ can "grow" a recursive structure, layer by layer, until the condition is met.
 For example, consider the code below:
 
 ```python
-type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
-
 def main():
   bend x = 0:
     when x < 3:
-      tree = Tree/Node { lft: fork(x + 1), rgt: fork(x + 1) }
+      tree = ![fork(x + 1), fork(x + 1)]
     else:
-      tree = Tree/Leaf { val: 7 }
+      tree = !7
   return tree
 ```
 
@@ -463,7 +442,7 @@ tree = fork(0)
 tree = ![fork(1), fork(1)]
 tree = ![![fork(2),fork(2)], ![fork(2),fork(2)]]
 tree = ![![![fork(3),fork(3)], ![fork(3),fork(3)]], ![![fork(3),fork(3)], ![fork(3),fork(3)]]]
-tree = ![![![7,7], ![7,7]], ![![7,7], ![7,7]]]
+tree = ![![![!7, !7], ![!7, !7]], ![![!7, !7], ![!7, !7]]]
 ```
 
 With some imagination, we can easily see that, by recursively unrolling a state
diff --git a/BUILTINS.md b/docs/builtins.md
similarity index 56%
rename from BUILTINS.md
rename to docs/builtins.md
index 345eb24b..109c164d 100644
--- a/BUILTINS.md
+++ b/docs/builtins.md
@@ -19,8 +19,6 @@ A String literal is surrounded with `"`. Accepts the same values as characters l
 ```
 
 
-
- 
 ## List
 ```python
 type List = (Cons head ~tail) | (Nil)
@@ -37,46 +35,64 @@ A List of values can be written using `[ ]`, it can have multiple values inside,
 ```
 
 
-
- 
-## Nat
+## Tree
 ```python
-type Nat = (Succ ~pred) | (Zero)
-```
-- **Succ ~pred**: Represents a natural number successor.
-- **Zero**: Represents the natural number zero.
-
-### Syntax
-A Natural Number can be written with literals with a `#` before the literal number.
-
-```
-#1337
+type Tree:
+  Node { ~left, ~right }
+  Leaf { value }
 ```
 
+**`Tree`** represents a tree with values stored in the leaves.
+Trees are a structure that naturally lends itself to parallel recursion, so writing your problem in terms of trees is a good first approach to parallelize your code.
 
+- **Node { ~left ~right }**: Represents a tree node with `left` and `right` subtrees.
+- **Leaf { value }**: Represents one of the ends of the tree, storing `value`.
 
-## Result
-```python
-type Result = (Ok val) | (Err val)
+#### Syntax
+**Bend** provides the `![]` operator to create tree branches and the `!` operator to create a tree leaf.
+```py
+# ![a, b] => Equivalent to Tree/Node { left: a, right: b }
+# !x      => Equivalent to Tree/Leaf { value: x }
+tree = ![![!1, !2],![!3, !4]]
 ```
-
-- **Ok val**: Represents a successful result with value `val`.
-- **Err val**: Represents an error with value `val`.
+Technically your trees don't need to end with leaves, but if you don't, your program will be very hard to reason about.
 
 ## Map
 ```python
-type Map = (Node value ~left ~right) | (Leaf)
+type Map:
+  Node { value ~left ~right }
+  Leaf
 ```
 
-- **Node value ~left ~right**: Represents a map node with a `value` and `left` and `right` subtrees.
-- **Leaf**: Represents an empty map.
+**`Map`** represents a tree with values stored in the branches.
+It is meant to be used as an efficient map data structure with integer keys and O(log n) read and write operations.
+
+- **Node { value ~left ~right }**: Represents a map node with a `value` and `left` and `right` subtrees. Empty nodes have `*` stored in the `value` field.
+- **Leaf**: Represents an unwritten, empty portion of the map.
 
 #### Syntax
-**Bend** has a built-in binary tree map data structure where the key is a `u24`, meaning you can use numbers, characters, and symbols as keys.
+Here's how you create a new `Map` with some initial values.:
 ```python
 { 0: 4, `hi`: "bye", 'c': 2 + 3 }
 ```
 
+The keys must be `U24` numbers, and can be given as literals or any other expression that evaluates to a `U24`.
+
+The values can be anything, but storing data of different types in a `Map` will make it harder for you to reason about it.
+
+You can read and write a value of a map with the `[]` operator:
+```python
+map = { 0: "zero", 1: "one", 2: "two", 3: "three" }
+map[0] = "not zero"
+map[1] = 2
+map[2] = 3
+map[3] = map[1] + map[map[1]]
+```
+
+Here, `map` must be the name of the `Map` variable, and the keys inside `[]` can be any expression that evaluates to a `U24`.
+
+
+## Map functions
 
 ### Map/empty
 Initializes an empty map.
@@ -86,6 +102,7 @@ Map/empty = Map/Leaf
 
 ### Map/get
 Retrieves a `value` from the `map` based on the `key`.
+Returns a tuple with the value and the `map` unchanged.
 ```rust
 Map/get map key =
   match map {
@@ -105,9 +122,8 @@ Map/get map key =
   }
 ```
 
-
 #### Syntax
-Considering the following tree
+Considering the following map
 ```python
 { 0: "hello", 1: "bye", 2: "maybe", 3: "yes"}
 ```
@@ -122,6 +138,7 @@ And the value resultant from the get function would be:
 
 ### Map/set
 Sets a `value` in the `map` at the specified `key`.
+Returns the map with the new value.
 ```rust
 Map/set map key value =
   match map {
@@ -149,22 +166,63 @@ Considering the following tree
 { 0: "hello", 1: "bye", 2: "maybe", 3: "yes"}
 ```
 The `set` function can be written as
-```
+```py
 x[0] = "swapped"     # Assigns the key 0 to the value "swapped"
 ```
 And the value resultant from the get function would be:
-```
+```py
 { 0: "swapped", 1: "bye", 2: "maybe", 3: "yes"}
 ```
 If there's no matching `key` in the tree, it would add a new branch to that tree with the value `set`
 
-```
+```py
 x[4] = "added"     # Assigns the key 4 to the value "added"
 ```
 The new tree
-```
+```py
 { 0: "swapped", 1: "bye", 2: "maybe", 3: "yes", 4: "added"}
 ```
 
+### Map/map
+Applies a function to a value in the map.
+Returns the map with the value mapped.
+```rust
+Map/map (Map/Leaf)                  key f = Map/Leaf
+Map/map (Map/Node value left right) key f =
+  switch _ = (== 0 key) {
+    0: switch _ = (% key 2) {
+      0:
+        (Map/Node value (Map/map left (/ key 2) f) right)
+      _:
+        (Map/Node value left (Map/map right (/ key 2) f))
+    }
+    _: (Map/Node (f value) left right)
+  }
+```
+
+#### Syntax
+With the same map that we `set` in the previous section, we can map it's values with `@=`:
+```py
+x[0] @= lambda y: String/concat(y, " and mapped")
+# x[0] now contains "swapped and mapped"
+```
+
+
+## Nat
+```python
+type Nat = (Succ ~pred) | (Zero)
+```
+- **Succ ~pred**: Represents a natural number successor.
+- **Zero**: Represents the natural number zero.
+
+### Syntax
+A Natural Number can be written with literals with a `#` before the literal number.
+
+```
+#1337
+```
+
+
+
 ## IO
 IO Functions are in the **next milestone**!
diff --git a/docs/syntax.md b/docs/syntax.md
index 5967a00e..fff0dddb 100644
--- a/docs/syntax.md
+++ b/docs/syntax.md
@@ -11,7 +11,7 @@ Both syntaxes can be mixed in the same file like the example below:
 ```python
 object Point { x, y }
 
-type Tree = (Node ~left ~right) | (Leaf value)
+type MyTree = (Node ~left ~right) | (Leaf value)
 
 type Bool:
   True
@@ -622,6 +622,18 @@ A List literal is surrounded by `[` `]`. The elements must be separated by `,`.
 
 It is desugared to constructor calls of the built-in type List, `List/cons(head, ~tail)` and `List/nil` .
 
+### Tree Literals
+
+```python
+![![1, 2], ![3, 4]]
+```
+
+The Tree literals `![]` and `!` are used to create values of the built-in type `Tree`.
+
+`![a b]` is equivalent to `Tree/Node(a, b)`.
+
+`!x` is equivalent to `Tree/Leaf(x)`.
+
 ### Map Literals
 
 ```python
@@ -1131,6 +1143,18 @@ The syntax above is desugared to:
 
 Using `,` is optional.
 
+### Tree Literals
+
+```python
+![![1, 2], ![3, 4]]
+```
+
+The Tree literals `![]` and `!` are used to create values of the built-in type `Tree`.
+
+`![a b]` is equivalent to `Tree/Node(a, b)`.
+
+`!x` is equivalent to `Tree/Leaf(x)`.
+
 ### Nat Literal
 
 ```rust
diff --git a/examples/gen_tree.bend b/examples/gen_tree.bend
index db243905..f433a5b9 100644
--- a/examples/gen_tree.bend
+++ b/examples/gen_tree.bend
@@ -1,14 +1,14 @@
 # Generates a tree with numbers in the nodes using 'bend'
-type Tree:
+type MyTree:
   Node { val, ~left, ~right }
   Leaf
 
 def tree_gen(n, x):
   bend n, x:
     when n != 0:
-      return Tree/Node(x, fork(n - 1, x*2+1), fork(n - 1, x*2+2))
+      return MyTree/Node(x, fork(n - 1, x*2+1), fork(n - 1, x*2+2))
     else:
-      return Tree/Leaf
+      return MyTree/Leaf
 
 def main:
   depth = 4
diff --git a/examples/parallel_and.bend b/examples/parallel_and.bend
index 55647b01..07fd6830 100644
--- a/examples/parallel_and.bend
+++ b/examples/parallel_and.bend
@@ -3,10 +3,6 @@ type Bool:
   True
   False
 
-type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
-
 def and(a, b):
   match a:
     case Bool/True:
@@ -17,16 +13,16 @@ def and(a, b):
 def all(tree):
   fold tree:
     case Tree/Node:
-      return and(tree.lft, tree.rgt)
+      return and(tree.left, tree.right)
     case Tree/Leaf:
-      return tree.val
+      return tree.value
 
 def gen(n):
   switch n:
     case 0:
       return Tree/Leaf(Bool/True)
     case _:
-      return Tree/Node { lft: gen(n-1), rgt: gen(n-1) }
+      return Tree/Node { left: gen(n-1), right: gen(n-1) }
 
 def main():
   return all(gen(8))
diff --git a/examples/quick_sort.bend b/examples/quick_sort.bend
index e7abccdc..84f0296f 100644
--- a/examples/quick_sort.bend
+++ b/examples/quick_sort.bend
@@ -1,32 +1,32 @@
-type Tree = Leaf | (Node l m r)
+type MyTree = Leaf | (Node lft val rgt)
 
 # Parallel QuickSort
-(Sort List/Nil)         = Tree/Leaf
-(Sort (List/Cons x xs)) =
-  ((Part x xs) λmin λmax
+(Sort List/Nil)         = MyTree/Leaf
+(Sort (List/Cons head tail)) =
+  ((Part head tail) λmin λmax
     let lft = (Sort min)
     let rgt = (Sort max)
-    (Tree/Node lft x rgt))
+    (MyTree/Node lft head rgt))
 
   # Partitions a list in two halves, less-than-p and greater-than-p
-  (Part p List/Nil)         = λt (t List/Nil List/Nil)
-  (Part p (List/Cons x xs)) = (Push (> x p) x (Part p xs))
+  (Part p List/Nil)              = λt (t List/Nil List/Nil)
+  (Part p (List/Cons head tail)) = (Push (> head p) head (Part p tail))
 
   # Pushes a value to the first or second list of a pair
   (Push 0 x pair) = (pair λmin λmax λp (p (List/Cons x min) max))
   (Push _ x pair) = (pair λmin λmax λp (p min (List/Cons x max)))
 
-# Generates a random list
-(Rnd 0 s) = List/Nil
-(Rnd n s) =
-  let s = (^ s (* s 0b10000000000000))
-  let s = (^ s (/ s 0b100000000000000000))
-  let s = (^ s (* s 0b100000))
-  (List/Cons s (Rnd (- n 1) s))
+# Generates a random list with xorshift
+(Rnd 0 state) = List/Nil
+(Rnd n state) =
+  let state = (^ state (<< state 13))
+  let state = (^ state (>> state 17))
+  let state = (^ state (<< state 5))
+  (List/Cons state (Rnd (- n 1) state))
 
 # Sums all elements in a concatenation tree
-(Sum Tree/Leaf)         = 0
-(Sum (Tree/Node l m r)) = (+ m (+ (Sum l) (Sum r)))
+(Sum MyTree/Leaf)               = 0
+(Sum (MyTree/Node lft val rgt)) = (+ val (+ (Sum lft) (Sum rgt)))
 
 # Sorts and sums n random numbers
 (Main) =
diff --git a/src/fun/builtins.bend b/src/fun/builtins.bend
index d198887e..4b1de122 100644
--- a/src/fun/builtins.bend
+++ b/src/fun/builtins.bend
@@ -1,7 +1,14 @@
 type String = (Nil) | (Cons head ~tail)
+
 type List   = (Nil) | (Cons head ~tail)
+
 type Nat    = (Succ ~pred) | (Zero)
 
+type Tree:
+  Node { ~left, ~right }
+  Leaf { value }
+
+
 # MAP Impl
 
 type Map = (Node value ~left ~right) | (Leaf)
diff --git a/src/fun/parser.rs b/src/fun/parser.rs
index 8155a28a..eb036438 100644
--- a/src/fun/parser.rs
+++ b/src/fun/parser.rs
@@ -316,12 +316,10 @@ impl<'a> TermParser<'a> {
 
         // Opr but maybe a tup
         self.skip_trivia();
-        let starts_with_oper = self.peek_one().map_or(false, |c| "+-*/%&|<>^=!".contains(c));
-        if starts_with_oper {
-          let opr = self.parse_oper()?;
+        if let Some(opr) = self.try_parse_oper() {
+          self.skip_trivia();
 
           // jk, actually a tuple
-          self.skip_trivia();
           if self.starts_with(",") && opr == Op::MUL {
             let mut els = vec![Term::Era];
             while self.try_consume(",") {
@@ -370,6 +368,26 @@ impl<'a> TermParser<'a> {
         return Ok(Term::List { els });
       }
 
+      // Tree Node
+      if self.starts_with("![") {
+        self.advance_one();
+        self.advance_one();
+        unexpected_tag(self)?;
+        let lft = self.parse_term()?;
+        self.try_consume(",");
+        let rgt = self.parse_term()?;
+        self.labelled(|p| p.consume("]"), "Only two children in a Tree/Node")?;
+        return Ok(Term::call(Term::r#ref("Tree/Node"), [lft, rgt]));
+      }
+
+      // Tree Leaf
+      if self.starts_with("!") {
+        self.advance_one();
+        unexpected_tag(self)?;
+        let val = self.parse_term()?;
+        return Ok(Term::app(Term::r#ref("Tree/Leaf"), val));
+      }
+
       // Sup
       if self.starts_with("{") {
         let els = self.list_like(|p| p.parse_term(), "{", "}", ",", false, 2)?;
@@ -1022,7 +1040,7 @@ pub trait ParserCommons<'a>: Parser<'a> {
     Ok(els)
   }
 
-  fn parse_oper(&mut self) -> ParseResult<Op> {
+  fn try_parse_oper(&mut self) -> Option<Op> {
     let opr = if self.try_consume_exactly("+") {
       Op::ADD
     } else if self.try_consume_exactly("-") {
@@ -1054,9 +1072,9 @@ pub trait ParserCommons<'a>: Parser<'a> {
     } else if self.try_consume_exactly("^") {
       Op::XOR
     } else {
-      return self.expected("numeric operator");
+      return None;
     };
-    Ok(opr)
+    Some(opr)
   }
 
   fn peek_oper(&mut self) -> Option<Op> {
diff --git a/src/imp/gen_map_get.rs b/src/imp/gen_map_get.rs
index 723f279f..5127e90a 100644
--- a/src/imp/gen_map_get.rs
+++ b/src/imp/gen_map_get.rs
@@ -190,6 +190,13 @@ impl Expr {
             go(entry, substitutions, id);
           }
         }
+        Expr::TreeNode { left, right } => {
+          go(left, substitutions, id);
+          go(right, substitutions, id);
+        }
+        Expr::TreeLeaf { val } => {
+          go(val, substitutions, id);
+        }
         Expr::Era | Expr::Str { .. } | Expr::Var { .. } | Expr::Chn { .. } | Expr::Num { .. } => {}
       }
     }
diff --git a/src/imp/mod.rs b/src/imp/mod.rs
index b5537f37..33e3c83d 100644
--- a/src/imp/mod.rs
+++ b/src/imp/mod.rs
@@ -38,6 +38,10 @@ pub enum Expr {
   Map { entries: Vec<(Expr, Expr)> },
   // {map} "[" {key} "]"
   MapGet { nam: Name, key: Box<Expr> },
+  // "![" {left} "," {right} "]"
+  TreeNode { left: Box<Expr>, right: Box<Expr> },
+  // "!" {val}
+  TreeLeaf { val: Box<Expr> },
 }
 
 #[derive(Clone, Debug)]
diff --git a/src/imp/order_kwargs.rs b/src/imp/order_kwargs.rs
index e714c8b6..426c3729 100644
--- a/src/imp/order_kwargs.rs
+++ b/src/imp/order_kwargs.rs
@@ -156,12 +156,17 @@ impl Expr {
           entry.1.order_kwargs(book)?;
         }
       }
-      Expr::MapGet { .. }
-      | Expr::Era
-      | Expr::Var { .. }
-      | Expr::Chn { .. }
-      | Expr::Num { .. }
-      | Expr::Str { .. } => {}
+      Expr::MapGet { nam: _, key } => {
+        key.order_kwargs(book)?;
+      }
+      Expr::TreeNode { left, right } => {
+        left.order_kwargs(book)?;
+        right.order_kwargs(book)?;
+      }
+      Expr::TreeLeaf { val } => {
+        val.order_kwargs(book)?;
+      }
+      Expr::Era | Expr::Var { .. } | Expr::Chn { .. } | Expr::Num { .. } | Expr::Str { .. } => {}
     }
     Ok(())
   }
diff --git a/src/imp/parser.rs b/src/imp/parser.rs
index 196eef60..35f133dc 100644
--- a/src/imp/parser.rs
+++ b/src/imp/parser.rs
@@ -83,87 +83,54 @@ impl<'a> PyParser<'a> {
     } else {
       self.skip_trivia();
     }
-    let Some(head) = self.peek_one() else { return self.expected("expression")? };
 
     let ini_idx = *self.index();
 
-    let base = match head {
+    let base = if self.starts_with("(") {
       // Tuple or parenthesized expression
-      '(' => {
-        self.advance_one();
-        let head = self.parse_expr(false)?;
-        self.skip_trivia();
-        if self.starts_with(",") {
-          // A Tuple
-          let mut els = vec![head];
-          while self.try_consume(",") {
-            els.push(self.parse_expr(false)?);
-          }
-          self.consume(")")?;
-          Expr::Tup { els }
-        } else {
-          self.consume(")")?;
-          // A parenthesized expression
-          head
-        }
-      }
+      self.parse_tuple_or_parens()?
+    } else if self.starts_with("{") {
       // Map or Sup
-      '{' => {
-        self.advance_one();
-        // Empty map
-        if self.try_consume("}") {
-          return Ok(Expr::Map { entries: vec![] });
-        }
-        let head = self.parse_expr(false)?;
-        self.skip_trivia();
-        if self.try_consume(",") {
-          self.parse_sup(head)?
-        } else if self.try_consume(":") {
-          self.parse_map_init(head)?
-        } else {
-          self.expected("',' or ':'")?
-        }
-      }
+      self.parse_map_or_sup()?
+    } else if self.starts_with("[") {
       // List or Comprehension
-      '[' => self.parse_list_or_comprehension()?,
+      self.parse_list_or_comprehension()?
+    } else if self.starts_with("![") {
+      // Tree Node
+      self.parse_tree_node()?
+    } else if self.starts_with("!") {
+      // Tree Leaf
+      self.parse_tree_leaf(inline)?
+    } else if self.starts_with("`") {
       // Symbol
-      '`' => Expr::Num { val: Num::U24(self.parse_quoted_symbol()?) },
+      Expr::Num { val: Num::U24(self.parse_quoted_symbol()?) }
+    } else if self.starts_with("\"") {
       // String
-      '\"' => {
-        let str = self.parse_quoted_string()?;
-        let val = STRINGS.get(str);
-        Expr::Str { val }
-      }
+      Expr::Str { val: STRINGS.get(self.parse_quoted_string()?) }
+    } else if self.starts_with("'") {
       // Char
-      '\'' => {
-        let chr = self.parse_quoted_char()?;
-        Expr::Num { val: Num::U24(chr as u32 & 0x00ff_ffff) }
-      }
+      Expr::Num { val: Num::U24(self.parse_quoted_char()? as u32 & 0x00ff_ffff) }
+    } else if self.starts_with("$") {
       // Unscoped var
-      '$' => {
-        self.advance_one();
-        let nam = self.parse_bend_name()?;
-        Expr::Chn { nam }
-      }
+      self.advance_one();
+      Expr::Chn { nam: self.parse_bend_name()? }
+    } else if self.starts_with("*") {
       // Era
-      '*' => {
-        self.advance_one();
-        Expr::Era
-      }
-      // Number
-      c if is_num_char(c) => {
-        let val = self.parse_number()?;
-        Expr::Num { val }
-      }
-      // var
-      _ => {
+      self.advance_one();
+      Expr::Era
+    } else if let Some(c) = self.peek_one() {
+      if is_num_char(c) {
+        // Number
+        Expr::Num { val: self.parse_number()? }
+      } else {
+        // Var
         let nam = self.labelled(|p| p.parse_bend_name(), "expression")?;
         Expr::Var { nam }
       }
+    } else {
+      self.expected("expression")?
     };
 
-    let end_idx = *self.index();
-
     // postfixes
     if inline {
       self.skip_trivia_inline();
@@ -202,12 +169,13 @@ impl<'a> PyParser<'a> {
 
     // map get
     if self.starts_with("[") {
-      self.advance_one();
       if let Expr::Var { nam } = base {
+        self.advance_one();
         let key = self.parse_expr(false)?;
         self.consume("]")?;
         return Ok(Expr::MapGet { nam, key: Box::new(key) });
       } else {
+        let end_idx = *self.index();
         return self.expected_spanned("Map variable name", ini_idx, end_idx);
       }
     }
@@ -218,6 +186,7 @@ impl<'a> PyParser<'a> {
         let kwargs = self.list_like(|p| p.data_kwarg(), "{", "}", ",", true, 0)?;
         return Ok(Expr::Ctr { name: nam, args: Vec::new(), kwargs });
       } else {
+        let end_idx = *self.index();
         return self.expected_spanned("Constructor name", ini_idx, end_idx);
       }
     }
@@ -226,6 +195,43 @@ impl<'a> PyParser<'a> {
     Ok(base)
   }
 
+  fn parse_tuple_or_parens(&mut self) -> ParseResult<Expr> {
+    self.advance_one();
+    let head = self.parse_expr(false)?;
+    self.skip_trivia();
+    let term = if self.starts_with(",") {
+      // A Tuple
+      let mut els = vec![head];
+      while self.try_consume(",") {
+        els.push(self.parse_expr(false)?);
+      }
+      self.consume(")")?;
+      Expr::Tup { els }
+    } else {
+      self.consume(")")?;
+      // A parenthesized expression
+      head
+    };
+    Ok(term)
+  }
+
+  fn parse_map_or_sup(&mut self) -> ParseResult<Expr> {
+    self.advance_one();
+    // Empty map
+    if self.try_consume("}") {
+      return Ok(Expr::Map { entries: vec![] });
+    }
+    let head = self.parse_expr(false)?;
+    self.skip_trivia();
+    if self.try_consume(",") {
+      self.parse_sup(head)
+    } else if self.try_consume(":") {
+      self.parse_map_init(head)
+    } else {
+      self.expected("',' or ':'")
+    }
+  }
+
   fn parse_map_init(&mut self, head: Expr) -> ParseResult<Expr> {
     let mut entries = Vec::new();
     let val = self.parse_expr(false)?;
@@ -246,6 +252,22 @@ impl<'a> PyParser<'a> {
     Ok(Expr::Sup { els })
   }
 
+  fn parse_tree_node(&mut self) -> ParseResult<Expr> {
+    self.advance_one();
+    self.advance_one();
+    let left = self.parse_expr(false)?;
+    self.consume(",")?;
+    let right = self.parse_expr(false)?;
+    self.consume("]")?;
+    Ok(Expr::TreeNode { left: Box::new(left), right: Box::new(right) })
+  }
+
+  fn parse_tree_leaf(&mut self, inline: bool) -> ParseResult<Expr> {
+    self.advance_one();
+    let val = self.parse_expr(inline)?;
+    Ok(Expr::TreeLeaf { val: Box::new(val) })
+  }
+
   fn data_kwarg(&mut self) -> ParseResult<(Name, Expr)> {
     self.skip_trivia();
     let nam = self.parse_bend_name()?;
@@ -366,7 +388,7 @@ impl<'a> PyParser<'a> {
       }
       while let Some(op) = self.peek_oper() {
         if op.precedence() == prec {
-          self.parse_oper()?;
+          self.try_parse_oper().unwrap();
           let rhs = self.parse_infix_expr(prec + 1, inline)?;
           lhs = Expr::Opr { op, lhs: Box::new(lhs), rhs: Box::new(rhs) };
           self.skip_trivia_inline();
diff --git a/src/imp/to_fun.rs b/src/imp/to_fun.rs
index 003d284a..37112b4a 100644
--- a/src/imp/to_fun.rs
+++ b/src/imp/to_fun.rs
@@ -448,6 +448,15 @@ impl Expr {
       }
       Expr::Map { entries } => map_init(entries),
       Expr::MapGet { .. } => unreachable!(),
+      Expr::TreeNode { left, right } => {
+        let left = left.to_fun();
+        let right = right.to_fun();
+        fun::Term::call(fun::Term::r#ref("Tree/Node"), [left, right])
+      }
+      Expr::TreeLeaf { val } => {
+        let val = val.to_fun();
+        fun::Term::app(fun::Term::r#ref("Tree/Leaf"), val)
+      }
     }
   }
 }
diff --git a/tests/golden_tests/compile_file/redex_order_recursive.bend b/tests/golden_tests/compile_file/redex_order_recursive.bend
index cb8d8da1..d8be1904 100644
--- a/tests/golden_tests/compile_file/redex_order_recursive.bend
+++ b/tests/golden_tests/compile_file/redex_order_recursive.bend
@@ -1,5 +1,3 @@
-type Tree = (node lft rgt) | (leaf val)
-
 tail_recursive = @x (x @pred @acc (tail_recursive pred (+ 1 acc)) @acc 0)
 
 fold_ = @bm (bm
@@ -60,23 +58,23 @@ List.reverse_over xs ys = match xs {
 }
 
 Tree.leaves tree = match tree {
-  Tree/leaf: 1
-  Tree/node: (+ (Tree.leaves tree.lft) (Tree.leaves tree.rgt))
+  Tree/Leaf: 1
+  Tree/Node: (+ (Tree.leaves tree.left) (Tree.leaves tree.right))
 }
 
 Tree.nodes tree = match tree {
-  Tree/leaf: 0
-  Tree/node: (+ 1 (+ (Tree.nodes tree.lft) (Tree.nodes tree.rgt)))
+  Tree/Leaf: 0
+  Tree/Node: (+ 1 (+ (Tree.nodes tree.left) (Tree.nodes tree.right)))
 }
 
 Tree.height tree = match tree {
-  Tree/leaf: 0
-  Tree/node: (+ 1 (max (Tree.height tree.lft) (Tree.height tree.rgt)))
+  Tree/Leaf: 0
+  Tree/Node: (+ 1 (max (Tree.height tree.left) (Tree.height tree.right)))
 }
 
 Tree.map tree f = match tree {
-  Tree/leaf: (Tree/leaf (f tree.val))
-  Tree/node: (Tree/node (Tree.map tree.lft f) (Tree.map tree.rgt f))
+  Tree/Leaf: (Tree/Leaf (f tree.value))
+  Tree/Node: (Tree/Node (Tree.map tree.left f) (Tree.map tree.right f))
 }
 
 max a b = switch (> a b) {
@@ -85,8 +83,8 @@ max a b = switch (> a b) {
 }
 
 Tree.flip tree = match tree {
-  Tree/leaf: tree
-  Tree/node: (Tree/node (Tree.flip tree.rgt) (Tree.flip tree.lft))
+  Tree/Leaf: tree
+  Tree/Node: (Tree/Node (Tree.flip tree.right) (Tree.flip tree.left))
 }
 
 calc =
diff --git a/tests/golden_tests/compile_file_o_all/non_exhaustive_tree.bend b/tests/golden_tests/compile_file_o_all/non_exhaustive_tree.bend
index 4a5125ea..4c6132ae 100644
--- a/tests/golden_tests/compile_file_o_all/non_exhaustive_tree.bend
+++ b/tests/golden_tests/compile_file_o_all/non_exhaustive_tree.bend
@@ -1,5 +1,4 @@
-type Tree = (Leaf a) | (Both a b)
 (Warp s (Tree/Leaf a)   (Tree/Leaf b))   = 0
-(Warp s (Tree/Both a b) (Tree/Both c d)) = 1
+(Warp s (Tree/Node a b) (Tree/Node c d)) = 1
 
 main = *
diff --git a/tests/golden_tests/compile_file_o_no_all/bitonic_sort.bend b/tests/golden_tests/compile_file_o_no_all/bitonic_sort.bend
index 8677fe7c..f0bcb55f 100644
--- a/tests/golden_tests/compile_file_o_no_all/bitonic_sort.bend
+++ b/tests/golden_tests/compile_file_o_no_all/bitonic_sort.bend
@@ -1,45 +1,44 @@
-type Tree = (Leaf a) | (Both a b)
 type Error = Err
 
 # Atomic Swapper
 (Swap n a b) = switch n {
-  0: (Tree/Both a b)
-  _: (Tree/Both b a)
+  0: (Tree/Node a b)
+  _: (Tree/Node b a)
 }
 
 # Swaps distant values in parallel; corresponds to a Red Box
 (Warp s (Tree/Leaf a)   (Tree/Leaf b))   = (Swap (^ (> a b) s) (Tree/Leaf a) (Tree/Leaf b))
-(Warp s (Tree/Both a b) (Tree/Both c d)) = (Join (Warp s a c) (Warp s b d))
+(Warp s (Tree/Node a b) (Tree/Node c d)) = (Join (Warp s a c) (Warp s b d))
 (Warp s a b) = Error/Err
 
 # Rebuilds the warped tree in the original order
-(Join (Tree/Both a b) (Tree/Both c d)) = (Tree/Both (Tree/Both a c) (Tree/Both b d))
+(Join (Tree/Node a b) (Tree/Node c d)) = (Tree/Node (Tree/Node a c) (Tree/Node b d))
 (Join a b) = Error/Err
 
 # Recursively warps each sub-tree; corresponds to a Blue/Green Box
 (Flow s (Tree/Leaf a))   = (Tree/Leaf a)
-(Flow s (Tree/Both a b)) = (Down s (Warp s a b))
+(Flow s (Tree/Node a b)) = (Down s (Warp s a b))
 
 # Propagates Flow downwards
 (Down s (Tree/Leaf a))   = (Tree/Leaf a)
-(Down s (Tree/Both a b)) = (Tree/Both (Flow s a) (Flow s b))
+(Down s (Tree/Node a b)) = (Tree/Node (Flow s a) (Flow s b))
 
 # Bitonic Sort
 (Sort s (Tree/Leaf a))   = (Tree/Leaf a)
-(Sort s (Tree/Both a b)) = (Flow s (Tree/Both (Sort 0 a) (Sort 1 b)))
+(Sort s (Tree/Node a b)) = (Flow s (Tree/Node (Sort 0 a) (Sort 1 b)))
 
 # Generates a tree of depth `n`
 (Gen n x) = switch n {
   0: (Tree/Leaf x)
-  _: (Tree/Both (Gen n-1 (* x 2)) (Gen n-1 (+ (* x 2) 1)))
+  _: (Tree/Node (Gen n-1 (* x 2)) (Gen n-1 (+ (* x 2) 1)))
 }
 
 # Reverses a tree
 (Rev (Tree/Leaf x))   = (Tree/Leaf x)
-(Rev (Tree/Both a b)) = (Tree/Both (Rev b) (Rev a))
+(Rev (Tree/Node a b)) = (Tree/Node (Rev b) (Rev a))
 
 # Sums a tree
 (Sum (Tree/Leaf x))   = x
-(Sum (Tree/Both a b)) = (+ (Sum a) (Sum b))
+(Sum (Tree/Node a b)) = (+ (Sum a) (Sum b))
 
 Main = (Sum (Sort 0 (Rev (Gen 4 0))))
diff --git a/tests/golden_tests/compile_file_o_no_all/sum_tree.bend b/tests/golden_tests/compile_file_o_no_all/sum_tree.bend
index b9f52108..40d6cf89 100644
--- a/tests/golden_tests/compile_file_o_no_all/sum_tree.bend
+++ b/tests/golden_tests/compile_file_o_no_all/sum_tree.bend
@@ -1,5 +1,3 @@
-type Tree = (Leaf x) | (Node x0 x1)
-
 add = λa λb (+ a b)
 
 gen = λn switch n {
@@ -9,8 +7,8 @@ gen = λn switch n {
 
 sum = λt
   match t {
-    Tree/Leaf: t.x
-    Tree/Node: (add (sum t.x0) (sum t.x1))
+    Tree/Leaf: t.value
+    Tree/Node: (add (sum t.left) (sum t.right))
   }
 
 main = (sum (gen 8))
diff --git a/tests/golden_tests/compile_long/huge_tree.bend b/tests/golden_tests/compile_long/huge_tree.bend
index af07582f..6fdc801b 100644
--- a/tests/golden_tests/compile_long/huge_tree.bend
+++ b/tests/golden_tests/compile_long/huge_tree.bend
@@ -1,3 +1,3 @@
-type Tree = (Node lt rt rd ld) | (Leaf val)
+type Tree_ = (Node lt rt rd ld) | (Leaf val)
 
-main = (Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node ((Tree/Node (Tree/Leaf (1)) (Tree/Leaf (1)) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf (1)) (Tree/Leaf (1)) (Tree/Leaf (0)) (Tree/Leaf (0)))) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node ((Tree/Node (Tree/Leaf (1)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (1)))) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (1)) (Tree/Leaf (1)))) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node ((Tree/Node (Tree/Leaf (16)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (15)))) (Tree/Leaf (0)) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (28)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (23)))))) ((Tree/Node ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (10)))) (Tree/Leaf (0)) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (14)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (15)))))))) ((Tree/Node ((Tree/Node ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (1)) (Tree/Leaf (0)))) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (1)) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf (1)) (Tree/Leaf (1)) (Tree/Leaf (0)) (Tree/Leaf (0)))))) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (1)) (Tree/Leaf (1)))) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (1)) (Tree/Leaf (1)))))) ((Tree/Node ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (5)))) (Tree/Leaf (0)) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (7)) (Tree/Leaf (0)))))) ((Tree/Node ((Tree/Node (Tree/Leaf (9)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (11)))) (Tree/Leaf (0)) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (22)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (17)))))))) ((Tree/Node ((Tree/Node ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (16)) (Tree/Leaf (0)))) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (15)) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (28)) (Tree/Leaf (0)))))) ((Tree/Node ((Tree/Node (Tree/Leaf (81)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (0)))) (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (10)) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (14)) (Tree/Leaf (0)))))) ((Tree/Node (Tree/Leaf (0)) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (23)) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf (16)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (15)))) (Tree/Leaf (0)))) ((Tree/Node ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (81)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (15)) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (10)))) (Tree/Leaf (0)))))) ((Tree/Node ((Tree/Node ((Tree/Node (Tree/Leaf (57)) (Tree/Leaf (0)) (Tree/Leaf (0)) (Tree/Leaf (0)))) ((Tree/Node (Tree/Leaf 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((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (28)) (Tree_/Leaf (0)))))) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (81)) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (10)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (14)) (Tree_/Leaf (0)))))))) ((Tree_/Node ((Tree_/Node ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (5)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (7)) (Tree_/Leaf (0)))))) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (9)) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (11)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) ((Tree_/Node (Tree_/Leaf (22)) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (17)))))) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (57)) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (29)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (5)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (9)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (11)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (22)) (Tree_/Leaf (0)))))))) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (0)) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (23)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (81)) (Tree_/Leaf (0)))) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (15)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) ((Tree_/Node ((Tree_/Node ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (57)) (Tree_/Leaf (0)))) ((Tree_/Node (Tree_/Leaf (7)) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (29)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) ((Tree_/Node (Tree_/Leaf (0)) ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (17)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)))))) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) ((Tree_/Node ((Tree_/Node (Tree_/Leaf (55)) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) ((Tree_/Node ((Tree_/Node ((Tree_/Node (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (55)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) (Tree_/Leaf (0)))) (Tree_/Leaf (0)) (Tree_/Leaf (0)) (Tree_/Leaf (0)))
diff --git a/tests/golden_tests/desugar_file/tree_syntax.bend b/tests/golden_tests/desugar_file/tree_syntax.bend
new file mode 100644
index 00000000..64e3c53a
--- /dev/null
+++ b/tests/golden_tests/desugar_file/tree_syntax.bend
@@ -0,0 +1,25 @@
+fun0 = ![!0 ![!1 ![!2, !3]]]
+fun1 = !(![!*!*])
+fun2 = !!!*
+fun3 = !1
+fun4 = @n switch n {
+  0: !0
+  _: ![(fun4 n-1) (fun4 n-1)]
+}
+
+def imp0:
+  return ![!0, ![!1, ![!2, !3]]]
+def imp1:
+  return !(![!*,!*])
+def imp2:
+  return !!!*
+def imp3:
+  return !1
+def imp4(n):
+  switch n:
+    case 0:
+      return !0
+    case _:
+      return ![imp4(n-1), imp4(n-1)]
+
+main = *
\ No newline at end of file
diff --git a/tests/golden_tests/run_file/bend_fold.bend b/tests/golden_tests/run_file/bend_fold.bend
index 3be4f459..ad289dea 100644
--- a/tests/golden_tests/run_file/bend_fold.bend
+++ b/tests/golden_tests/run_file/bend_fold.bend
@@ -1,6 +1,4 @@
 # should return (a+b+c) * 2^depth
-type Tree = (node ~lft ~rgt) | (leaf val)
-
 main =
   let depth = 2
   let a = 1;
@@ -9,11 +7,11 @@ main =
   let n = 0;
   let tree = bend n {
     when (< n depth):
-      (Tree/node (fork (+ n 1)) (fork (+ n 1)))
+      ![(fork (+ n 1)) (fork (+ n 1))]
     else:
-      (Tree/leaf c)
+      !c
   }
   fold tree {
-    Tree/node: (+ tree.lft tree.rgt)
-    Tree/leaf: (+ tree.val (+ a b))
+    Tree/Node: (+ tree.left tree.right)
+    Tree/Leaf: (+ tree.value (+ a b))
   }
diff --git a/tests/golden_tests/run_file/bitonic_sort.bend b/tests/golden_tests/run_file/bitonic_sort.bend
index 8677fe7c..f0bcb55f 100644
--- a/tests/golden_tests/run_file/bitonic_sort.bend
+++ b/tests/golden_tests/run_file/bitonic_sort.bend
@@ -1,45 +1,44 @@
-type Tree = (Leaf a) | (Both a b)
 type Error = Err
 
 # Atomic Swapper
 (Swap n a b) = switch n {
-  0: (Tree/Both a b)
-  _: (Tree/Both b a)
+  0: (Tree/Node a b)
+  _: (Tree/Node b a)
 }
 
 # Swaps distant values in parallel; corresponds to a Red Box
 (Warp s (Tree/Leaf a)   (Tree/Leaf b))   = (Swap (^ (> a b) s) (Tree/Leaf a) (Tree/Leaf b))
-(Warp s (Tree/Both a b) (Tree/Both c d)) = (Join (Warp s a c) (Warp s b d))
+(Warp s (Tree/Node a b) (Tree/Node c d)) = (Join (Warp s a c) (Warp s b d))
 (Warp s a b) = Error/Err
 
 # Rebuilds the warped tree in the original order
-(Join (Tree/Both a b) (Tree/Both c d)) = (Tree/Both (Tree/Both a c) (Tree/Both b d))
+(Join (Tree/Node a b) (Tree/Node c d)) = (Tree/Node (Tree/Node a c) (Tree/Node b d))
 (Join a b) = Error/Err
 
 # Recursively warps each sub-tree; corresponds to a Blue/Green Box
 (Flow s (Tree/Leaf a))   = (Tree/Leaf a)
-(Flow s (Tree/Both a b)) = (Down s (Warp s a b))
+(Flow s (Tree/Node a b)) = (Down s (Warp s a b))
 
 # Propagates Flow downwards
 (Down s (Tree/Leaf a))   = (Tree/Leaf a)
-(Down s (Tree/Both a b)) = (Tree/Both (Flow s a) (Flow s b))
+(Down s (Tree/Node a b)) = (Tree/Node (Flow s a) (Flow s b))
 
 # Bitonic Sort
 (Sort s (Tree/Leaf a))   = (Tree/Leaf a)
-(Sort s (Tree/Both a b)) = (Flow s (Tree/Both (Sort 0 a) (Sort 1 b)))
+(Sort s (Tree/Node a b)) = (Flow s (Tree/Node (Sort 0 a) (Sort 1 b)))
 
 # Generates a tree of depth `n`
 (Gen n x) = switch n {
   0: (Tree/Leaf x)
-  _: (Tree/Both (Gen n-1 (* x 2)) (Gen n-1 (+ (* x 2) 1)))
+  _: (Tree/Node (Gen n-1 (* x 2)) (Gen n-1 (+ (* x 2) 1)))
 }
 
 # Reverses a tree
 (Rev (Tree/Leaf x))   = (Tree/Leaf x)
-(Rev (Tree/Both a b)) = (Tree/Both (Rev b) (Rev a))
+(Rev (Tree/Node a b)) = (Tree/Node (Rev b) (Rev a))
 
 # Sums a tree
 (Sum (Tree/Leaf x))   = x
-(Sum (Tree/Both a b)) = (+ (Sum a) (Sum b))
+(Sum (Tree/Node a b)) = (+ (Sum a) (Sum b))
 
 Main = (Sum (Sort 0 (Rev (Gen 4 0))))
diff --git a/tests/golden_tests/run_file/branch_statements_assignment.bend b/tests/golden_tests/run_file/branch_statements_assignment.bend
index c548dd52..648bc45b 100644
--- a/tests/golden_tests/run_file/branch_statements_assignment.bend
+++ b/tests/golden_tests/run_file/branch_statements_assignment.bend
@@ -1,5 +1,5 @@
 # Test that branching statements can end with an assignment
-type Tree:
+type MyTree:
   node { val, ~lft, ~rgt }
   leaf
 
@@ -13,14 +13,14 @@ def main:
 
   bend x = 1, h = 0:
     when h < n:
-      y = Tree/node { val: x, lft: fork(2 * x, h + 1), rgt: fork(2 * x + 1, h + 1) }
+      y = MyTree/node { val: x, lft: fork(2 * x, h + 1), rgt: fork(2 * x + 1, h + 1) }
     else:
-      y = Tree/leaf
+      y = MyTree/leaf
 
   fold y:
-    case Tree/node:
+    case MyTree/node:
       z = y.val + y.lft + y.rgt
-    case Tree/leaf:
+    case MyTree/leaf:
       z = 0
 
   return z
\ No newline at end of file
diff --git a/tests/golden_tests/run_file/guide_bend_7tree.bend b/tests/golden_tests/run_file/guide_bend_7tree.bend
index 975e3351..542b6d95 100644
--- a/tests/golden_tests/run_file/guide_bend_7tree.bend
+++ b/tests/golden_tests/run_file/guide_bend_7tree.bend
@@ -1,11 +1,7 @@
-type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
-
 def main():
   bend x = 0:
     when x < 3:
-      tree = Tree/Node { lft: fork(x + 1), rgt: fork(x + 1) }
+      tree = ![fork(x + 1), fork(x + 1)]
     else:
-      tree = Tree/Leaf { val: 7 }
+      tree = !7
   return tree
\ No newline at end of file
diff --git a/tests/golden_tests/run_file/guide_enumerate.bend b/tests/golden_tests/run_file/guide_enumerate.bend
index 9d20a8d6..28b2b008 100644
--- a/tests/golden_tests/run_file/guide_enumerate.bend
+++ b/tests/golden_tests/run_file/guide_enumerate.bend
@@ -1,21 +1,11 @@
-type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
-
 def enum(tree):
   idx = 0
   fold tree with idx:
     case Tree/Node:
-      return Tree/Node {
-        lft: tree.lft(idx * 2 + 0),
-        rgt: tree.rgt(idx * 2 + 1),
-      }
+      return ![tree.left(idx * 2 + 0), tree.right(idx * 2 + 1)]
     case Tree/Leaf:
-      return Tree/Leaf { val: (idx, tree.val) }
+      return !(idx, tree.value)
 
 def main:
-  tree = Tree/Node {
-    lft: Tree/Node { lft: Tree/Leaf { val: 1 }, rgt: Tree/Leaf { val: 2 }, },
-    rgt: Tree/Node { lft: Tree/Leaf { val: 3 }, rgt: Tree/Leaf { val: 4 }, }
-  }
+  tree = ![![!1, !2], ![!3, !4]]
   return enum(tree)
\ No newline at end of file
diff --git a/tests/golden_tests/run_file/guide_sum.bend b/tests/golden_tests/run_file/guide_sum.bend
index da51687c..3fdaaeba 100644
--- a/tests/golden_tests/run_file/guide_sum.bend
+++ b/tests/golden_tests/run_file/guide_sum.bend
@@ -1,17 +1,10 @@
-type Tree:
-  Node { ~lft, ~rgt }
-  Leaf { val }
-
 def sum(tree):
   fold tree:
     case Tree/Node:
-      return tree.lft + tree.rgt
+      return tree.left + tree.right
     case Tree/Leaf:
-      return tree.val
+      return tree.value
 
 def main:
-  tree = Tree/Node {
-    lft: Tree/Node { lft: Tree/Leaf { val: 1 }, rgt: Tree/Leaf { val: 2 } },
-    rgt: Tree/Node { lft: Tree/Leaf { val: 3 }, rgt: Tree/Leaf { val: 4 } }
-  }
+  tree = ![![!1, !2], ![!3, !4]]
   return sum(tree)
\ No newline at end of file
diff --git a/tests/golden_tests/run_file/merge_sort.bend b/tests/golden_tests/run_file/merge_sort.bend
index 1451fa40..505fc8f3 100644
--- a/tests/golden_tests/run_file/merge_sort.bend
+++ b/tests/golden_tests/run_file/merge_sort.bend
@@ -1,23 +1,20 @@
-type Tree = (Leaf x) | (Node x0 x1)
-type List_ = Nil | (Cons h t)
-
-sort (Tree/Leaf v) = (List_/Cons v List_/Nil)
+sort (Tree/Leaf v) = (List/Cons v List/Nil)
 sort (Tree/Node a b) = (merge (sort a) (sort b))
 
-merge (List_/Nil) b = b
-merge (List_/Cons x xs) (List_/Nil) = (List_/Cons x xs)
-merge (List_/Cons x xs) (List_/Cons y ys) =
+merge (List/Nil) b = b
+merge (List/Cons x xs) (List/Nil) = (List/Cons x xs)
+merge (List/Cons x xs) (List/Cons y ys) =
   let t = switch _ = (< x y) {
     0: λaλbλcλt(t c a b)
     _: λaλbλcλt(t a b c)
   }
 
-  let t = (t (List_/Cons x) λx(x) (List_/Cons y))
+  let t = (t (List/Cons x) λx(x) (List/Cons y))
 
   (t λa λb λc (a (merge (b xs) (c ys))))
 
-sum List_/Nil = 0
-sum (List_/Cons h t) = (+ h (sum t))
+sum List/Nil = 0
+sum (List/Cons h t) = (+ h (sum t))
 
 range n = switch n {
   0: λx (Tree/Leaf x)
diff --git a/tests/golden_tests/run_file/mixed_syntax.bend b/tests/golden_tests/run_file/mixed_syntax.bend
index 545991a0..766d3bed 100644
--- a/tests/golden_tests/run_file/mixed_syntax.bend
+++ b/tests/golden_tests/run_file/mixed_syntax.bend
@@ -2,13 +2,13 @@ type Bool:
   True
   False
 
-type Tree = (node ~lft ~rgt) | (leaf val)
+type MyTree = (node ~lft ~rgt) | (leaf val)
 
 def tree_xor(tree):
   fold tree:
-    case Tree/node:
+    case MyTree/node:
       return xor(tree.lft, tree.rgt);
-    case Tree/leaf:
+    case MyTree/leaf:
       return tree.val;
 
 (xor Bool/True Bool/False) = Bool/True
@@ -19,8 +19,8 @@ main =
   let depth = 10
   let tree = bend n = 0 {
     when (< n depth):
-      (Tree/node (fork (+ n 1)) (fork (+ n 1)))
+      (MyTree/node (fork (+ n 1)) (fork (+ n 1)))
     else:
-      if (% n 2) { (Tree/leaf Bool/True) } else { (Tree/leaf Bool/False) }
+      if (% n 2) { (MyTree/leaf Bool/True) } else { (MyTree/leaf Bool/False) }
   }
   (tree_xor tree)
diff --git a/tests/golden_tests/run_file/sum_tree.bend b/tests/golden_tests/run_file/sum_tree.bend
index b9f52108..40d6cf89 100644
--- a/tests/golden_tests/run_file/sum_tree.bend
+++ b/tests/golden_tests/run_file/sum_tree.bend
@@ -1,5 +1,3 @@
-type Tree = (Leaf x) | (Node x0 x1)
-
 add = λa λb (+ a b)
 
 gen = λn switch n {
@@ -9,8 +7,8 @@ gen = λn switch n {
 
 sum = λt
   match t {
-    Tree/Leaf: t.x
-    Tree/Node: (add (sum t.x0) (sum t.x1))
+    Tree/Leaf: t.value
+    Tree/Node: (add (sum t.left) (sum t.right))
   }
 
 main = (sum (gen 8))
diff --git a/tests/golden_tests/simplify_matches/complex_with_case.bend b/tests/golden_tests/simplify_matches/complex_with_case.bend
index 7a7bebb4..0425125d 100644
--- a/tests/golden_tests/simplify_matches/complex_with_case.bend
+++ b/tests/golden_tests/simplify_matches/complex_with_case.bend
@@ -1,11 +1,11 @@
-type Tree = (Node lt rt rd ld) | (Leaf val)
+type Tree_ = (Node lt rt rd ld) | (Leaf val)
 
 (map) =
   λarg1 λarg2 use tree = arg2;
   use f = arg1;
   match tree with f {
-    Tree/Node: (Tree/Node (map f tree.lt) (map f tree.rt) (map f tree.rd) (map f tree.ld));
-    Tree/Leaf: (Tree/Leaf (f tree.val));
+    Tree_/Node: (Tree_/Node (map f tree.lt) (map f tree.rt) (map f tree.rd) (map f tree.ld));
+    Tree_/Leaf: (Tree_/Leaf (f tree.val));
   }
 
 main = map
diff --git a/tests/snapshots/compile_file__redex_order_recursive.bend.snap b/tests/snapshots/compile_file__redex_order_recursive.bend.snap
index 077b3106..112e68d0 100644
--- a/tests/snapshots/compile_file__redex_order_recursive.bend.snap
+++ b/tests/snapshots/compile_file__redex_order_recursive.bend.snap
@@ -88,12 +88,12 @@ input_file: tests/golden_tests/compile_file/redex_order_recursive.bend
 @Tree.flip = ((@Tree.flip__C2 a) a)
 
 @Tree.flip__C0 = (c (a e))
-  & @Tree/node ~ (b (d e))
+  & @Tree/Node ~ (b (d e))
   &!@Tree.flip ~ (a b)
   &!@Tree.flip ~ (c d)
 
 @Tree.flip__C1 = (* a)
-  & @Tree/leaf ~ a
+  & @Tree/Leaf ~ a
 
 @Tree.flip__C2 = (?((@Tree.flip__C0 @Tree.flip__C1) a) a)
 
@@ -118,12 +118,12 @@ input_file: tests/golden_tests/compile_file/redex_order_recursive.bend
 @Tree.map = ((@Tree.map__C2 a) a)
 
 @Tree.map__C0 = (a (d ({b e} g)))
-  & @Tree/node ~ (c (f g))
+  & @Tree/Node ~ (c (f g))
   &!@Tree.map ~ (a (b c))
   &!@Tree.map ~ (d (e f))
 
 @Tree.map__C1 = (* (a ((a b) c)))
-  & @Tree/leaf ~ (b c)
+  & @Tree/Leaf ~ (b c)
 
 @Tree.map__C2 = (?((@Tree.map__C0 @Tree.map__C1) a) a)
 
@@ -136,13 +136,13 @@ input_file: tests/golden_tests/compile_file/redex_order_recursive.bend
 
 @Tree.nodes__C1 = (?((@Tree.nodes__C0 (* (* 0))) a) a)
 
-@Tree/leaf = (a ((@Tree/leaf/tag (a b)) b))
+@Tree/Leaf = (a ((@Tree/Leaf/tag (a b)) b))
 
-@Tree/leaf/tag = 1
+@Tree/Leaf/tag = 1
 
-@Tree/node = (a (b ((@Tree/node/tag (a (b c))) c)))
+@Tree/Node = (a (b ((@Tree/Node/tag (a (b c))) c)))
 
-@Tree/node/tag = 0
+@Tree/Node/tag = 0
 
 @add = ((@add__C0 ((a a) b)) b)
 
diff --git a/tests/snapshots/compile_file_o_all__non_exhaustive_tree.bend.snap b/tests/snapshots/compile_file_o_all__non_exhaustive_tree.bend.snap
index aec70622..dca4a814 100644
--- a/tests/snapshots/compile_file_o_all__non_exhaustive_tree.bend.snap
+++ b/tests/snapshots/compile_file_o_all__non_exhaustive_tree.bend.snap
@@ -4,4 +4,4 @@ input_file: tests/golden_tests/compile_file_o_all/non_exhaustive_tree.bend
 ---
 Errors:
 In definition 'Warp':
-  Non-exhaustive pattern matching rule. Constructor 'Tree/Both' of type 'Tree' not covered
+  Non-exhaustive pattern matching rule. Constructor 'Tree/Leaf' of type 'Tree' not covered
diff --git a/tests/snapshots/desugar_file__tree_syntax.bend.snap b/tests/snapshots/desugar_file__tree_syntax.bend.snap
new file mode 100644
index 00000000..bb451600
--- /dev/null
+++ b/tests/snapshots/desugar_file__tree_syntax.bend.snap
@@ -0,0 +1,37 @@
+---
+source: tests/golden_tests.rs
+input_file: tests/golden_tests/desugar_file/tree_syntax.bend
+---
+(fun0) = (Tree/Node (Tree/Leaf 0) (Tree/Node (Tree/Leaf 1) (Tree/Node (Tree/Leaf 2) (Tree/Leaf 3))))
+
+(fun1) = (Tree/Leaf (Tree/Node (Tree/Leaf *) (Tree/Leaf *)))
+
+(fun2) = (Tree/Leaf (Tree/Leaf (Tree/Leaf *)))
+
+(fun3) = (Tree/Leaf 1)
+
+(fun4) = λa switch a { 0: (Tree/Leaf 0); _: fun4__C0; }
+
+(imp0) = (Tree/Node (Tree/Leaf 0) (Tree/Node (Tree/Leaf 1) (Tree/Node (Tree/Leaf 2) (Tree/Leaf 3))))
+
+(imp1) = (Tree/Leaf (Tree/Node (Tree/Leaf *) (Tree/Leaf *)))
+
+(imp2) = (Tree/Leaf (Tree/Leaf (Tree/Leaf *)))
+
+(imp3) = (Tree/Leaf 1)
+
+(imp4) = λa switch a { 0: (Tree/Leaf 0); _: imp4__C0; }
+
+(main) = *
+
+(Tree/Node) = λa λb λc (c Tree/Node/tag a b)
+
+(Tree/Leaf) = λa λb (b Tree/Leaf/tag a)
+
+(Tree/Node/tag) = 0
+
+(Tree/Leaf/tag) = 1
+
+(fun4__C0) = λa let {b c} = a; (Tree/Node (fun4 b) (fun4 c))
+
+(imp4__C0) = λa let {b c} = a; (Tree/Node (imp4 b) (imp4 c))
diff --git a/tests/snapshots/examples__gen_tree.bend.snap b/tests/snapshots/examples__gen_tree.bend.snap
index 0ca693db..55361402 100644
--- a/tests/snapshots/examples__gen_tree.bend.snap
+++ b/tests/snapshots/examples__gen_tree.bend.snap
@@ -2,4 +2,4 @@
 source: tests/golden_tests.rs
 input_file: examples/gen_tree.bend
 ---
-λa (a Tree/Node/tag 1 λb (b Tree/Node/tag 3 λc (c Tree/Node/tag 7 λd (d Tree/Node/tag 15 Tree/Leaf Tree/Leaf) λe (e Tree/Node/tag 16 Tree/Leaf Tree/Leaf)) λf (f Tree/Node/tag 8 λg (g Tree/Node/tag 17 Tree/Leaf Tree/Leaf) λh (h Tree/Node/tag 18 Tree/Leaf Tree/Leaf))) λi (i Tree/Node/tag 4 λj (j Tree/Node/tag 9 λk (k Tree/Node/tag 19 Tree/Leaf Tree/Leaf) λl (l Tree/Node/tag 20 Tree/Leaf Tree/Leaf)) λm (m Tree/Node/tag 10 λn (n Tree/Node/tag 21 Tree/Leaf Tree/Leaf) λo (o Tree/Node/tag 22 Tree/Leaf Tree/Leaf))))
+λa (a MyTree/Node/tag 1 λb (b MyTree/Node/tag 3 λc (c MyTree/Node/tag 7 λd (d MyTree/Node/tag 15 MyTree/Leaf MyTree/Leaf) λe (e MyTree/Node/tag 16 MyTree/Leaf MyTree/Leaf)) λf (f MyTree/Node/tag 8 λg (g MyTree/Node/tag 17 MyTree/Leaf MyTree/Leaf) λh (h MyTree/Node/tag 18 MyTree/Leaf MyTree/Leaf))) λi (i MyTree/Node/tag 4 λj (j MyTree/Node/tag 9 λk (k MyTree/Node/tag 19 MyTree/Leaf MyTree/Leaf) λl (l MyTree/Node/tag 20 MyTree/Leaf MyTree/Leaf)) λm (m MyTree/Node/tag 10 λn (n MyTree/Node/tag 21 MyTree/Leaf MyTree/Leaf) λo (o MyTree/Node/tag 22 MyTree/Leaf MyTree/Leaf))))
diff --git a/tests/snapshots/simplify_matches__complex_with_case.bend.snap b/tests/snapshots/simplify_matches__complex_with_case.bend.snap
index 24dc9ef7..c01798f0 100644
--- a/tests/snapshots/simplify_matches__complex_with_case.bend.snap
+++ b/tests/snapshots/simplify_matches__complex_with_case.bend.snap
@@ -2,14 +2,14 @@
 source: tests/golden_tests.rs
 input_file: tests/golden_tests/simplify_matches/complex_with_case.bend
 ---
-(map) = λa λb (match b { Tree/Node c d e f: λg (Tree/Node (map g c) (map g d) (map g e) (map g f)); Tree/Leaf h: λi (Tree/Leaf (i h)); } a)
+(map) = λa λb (match b { Tree_/Node c d e f: λg (Tree_/Node (map g c) (map g d) (map g e) (map g f)); Tree_/Leaf h: λi (Tree_/Leaf (i h)); } a)
 
 (main) = map
 
-(Tree/Node) = λa λb λc λd λe (e Tree/Node/tag a b c d)
+(Tree_/Node) = λa λb λc λd λe (e Tree_/Node/tag a b c d)
 
-(Tree/Leaf) = λa λb (b Tree/Leaf/tag a)
+(Tree_/Leaf) = λa λb (b Tree_/Leaf/tag a)
 
-(Tree/Node/tag) = 0
+(Tree_/Node/tag) = 0
 
-(Tree/Leaf/tag) = 1
+(Tree_/Leaf/tag) = 1