Fixed exponent expression not being in right-first order of operations

libs/compiler/src/variable_manager.rs

@@ -0,0 +1,33 @@
+// r0  - r3  : function arguments
+// r4  - r9  : temporary variables
+// r10 - r15 : persistant variables
+
+use std::collections::HashMap;
+
+enum VarType {
+    /// Represents a parameter register (r0 - r3)
+    Func(u8),
+    /// Represents a temporary register (r4 - r8)
+    Temp(u8),
+    /// Represents a variable register (r9 - r15)
+    Persist(u8),
+    /// Represents a stack pointer offset for a given variable
+    Stack(u16),
+}
+
+#[derive(Default)]
+pub struct VariableScope<'a> {
+    stack: Vec<HashMap<&'a str, usize>>,
+    temp: HashMap<&'a str, u8>,
+    persist: HashMap<&'a str, u8>,
+    parent: Option<&'a VariableScope<'a>>,
+}
+
+impl<'a> VariableScope<'a> {
+    pub fn scoped(parent: &'a VariableScope<'a>) -> Self {
+        Self {
+            parent: Option::Some(parent),
+            ..Default::default()
+        }
+    }
+}