Moving over from a VM interpreter to natively compiled w/ LLVM

11 files changed, 0 insertions, 1211 deletions

diff --git a/crates/sloth_vm/src/lib.rs b/crates/sloth_vm/src/lib.rs
deleted file mode 100644
index 9cf552b..0000000
--- a/crates/sloth_vm/src/lib.rs
+++ /dev/null
@@ -1,155 +0,0 @@
-#![allow(dead_code)]
-#![warn(
-    clippy::wildcard_imports,
-    clippy::string_add,
-    clippy::string_add_assign,
-    clippy::manual_ok_or,
-    unused_lifetimes
-)]
-
-pub mod native;
-pub mod sloth_std;
-pub mod value;
-pub mod vm;
-
-use std::ops::{Index, IndexMut};
-
-use value::{Object, ObjectType};
-
-use crate::value::Primitive;
-pub use crate::vm::VM;
-
-#[derive(Default)]
-pub struct Chunk {
-    pub constants: Vec<Primitive>,
-    pub code: Vec<u8>,
-}
-
-const STACK_SIZE: usize = 1024;
-
-#[derive(Debug)]
-pub struct Stack {
-    stack: [Primitive; STACK_SIZE],
-    top: usize,
-}
-
-impl Default for Stack {
-    fn default() -> Self {
-        Self {
-            top: Default::default(),
-            stack: [Primitive::Empty; STACK_SIZE],
-        }
-    }
-}
-
-impl Stack {
-    #[inline(always)]
-    pub fn push(&mut self, value: Primitive) {
-        if self.top >= STACK_SIZE {
-            panic!("Stack overflow");
-        }
-
-        self.stack[self.top] = value;
-        self.top += 1;
-    }
-
-    #[inline(always)]
-    pub fn pop(&mut self) -> Primitive {
-        if self.top == 0 {
-            panic!("Stack underflow");
-        }
-
-        self.top -= 1;
-        self.stack[self.top]
-    }
-
-    #[inline(always)]
-    pub fn pop2(&mut self) -> (Primitive, Primitive) {
-        (self.pop(), self.pop())
-    }
-
-    #[inline(always)]
-    pub fn peek(&self) -> Primitive {
-        self.stack[self.top - 1]
-    }
-
-    #[inline(always)]
-    pub fn peek_nth(&self, nth: usize) -> Primitive {
-        self.stack[self.top - 1 - nth]
-    }
-}
-
-impl Index<usize> for Stack {
-    type Output = Primitive;
-
-    fn index(&self, index: usize) -> &Self::Output {
-        &self.stack[index]
-    }
-}
-
-impl IndexMut<usize> for Stack {
-    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
-        &mut self.stack[index]
-    }
-}
-
-pub struct ObjectMap {
-    free: usize,
-    heap: Vec<Object>,
-}
-
-impl Default for ObjectMap {
-    fn default() -> Self {
-        Self::with_capacity(32)
-    }
-}
-
-impl From<Vec<Object>> for ObjectMap {
-    fn from(heap: Vec<Object>) -> Self {
-        let mut free = heap.len();
-        for (idx, obj) in heap.iter().enumerate() {
-            if let ObjectType::Free { .. } = obj.typ {
-                free = idx;
-                break;
-            }
-        }
-
-        Self { free, heap }
-    }
-}
-
-impl ObjectMap {
-    pub fn with_capacity(capacity: usize) -> Self {
-        let mut heap = Vec::with_capacity(capacity);
-        for i in 0..capacity {
-            heap.push(Object::new(ObjectType::Free { next: i + 1 }));
-        }
-
-        Self { free: 0, heap }
-    }
-
-    pub fn allocate(&mut self, object: Object) -> usize {
-        let current = self.free;
-        if current >= self.heap.len() {
-            self.heap
-                .push(Object::new(ObjectType::Free { next: current + 1 }))
-        }
-
-        let ObjectType::Free { next } = self.heap[current].typ else {
-            panic!("Allocation failed: Expected free location wasn't free");
-        };
-
-        self.heap[current] = object;
-        self.free = next;
-
-        current
-    }
-
-    pub fn get(&self, idx: usize) -> Option<&Object> {
-        self.heap.get(idx)
-    }
-
-    pub fn get_mut(&mut self, idx: usize) -> Option<&mut Object> {
-        self.heap.get_mut(idx)
-    }
-}
diff --git a/crates/sloth_vm/src/native.rs b/crates/sloth_vm/src/native.rs
deleted file mode 100644
index fbd2626..0000000
--- a/crates/sloth_vm/src/native.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-use crate::value::Primitive;
-use crate::VM;
-
-pub type NativeFunctionResult = Result<Primitive, Error>;
-pub type NativeFunctionInput = fn(&mut VM, &[Primitive]) -> NativeFunctionResult;
-
-pub enum Error {
-    InvalidArgument,
-    Unknown(String),
-}
-
-#[allow(clippy::type_complexity)]
-pub struct NativeFunction {
-    pub name: &'static str,
-    pub function: NativeFunctionInput,
-    pub arity: u8,
-    pub returns_value: bool,
-    pub doc: Option<&'static str>,
-}
diff --git a/crates/sloth_vm/src/sloth_std/file.rs b/crates/sloth_vm/src/sloth_std/file.rs
deleted file mode 100644
index b0b476a..0000000
--- a/crates/sloth_vm/src/sloth_std/file.rs
+++ /dev/null
@@ -1,83 +0,0 @@
-use std::fs;
-
-use crate::native::{self, NativeFunction, NativeFunctionResult};
-use crate::value::{Object, ObjectType, Primitive};
-use crate::VM;
-
-fn file_read(vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let Some(Primitive::Object(ptr)) = args.get(0).cloned() else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let object = vm
-        .objects()
-        .get(ptr as usize)
-        .ok_or(native::Error::InvalidArgument)?;
-
-    let ObjectType::String(str) = &object.typ else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let contents = fs::read_to_string(str).expect("IO Error: Failed to read file!");
-
-    let object = Object::new(ObjectType::String(contents));
-    let ptr = vm.objects_mut().allocate(object);
-
-    Ok(Primitive::Object(ptr as u32))
-}
-
-pub const FILE_READ: NativeFunction = NativeFunction {
-    name: "file$read",
-    function: file_read,
-    arity: 1,
-    returns_value: true,
-    doc: Some(
-        "NativeFunction file$read: \n\targs: path (str)\n\tdesc: Returns the contents of a file \
-         at <path>\n\tExample: `var todo = file$read('/home/sloth/todo.txt'); # Assuming the \
-         contents of todo.txt are 'Take a nap' then todo = 'Take a nap'`",
-    ),
-};
-
-fn file_write(vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let Some(Primitive::Object(path_ptr)) = args.get(0).cloned() else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let path_object = vm
-        .objects()
-        .get(path_ptr as usize)
-        .ok_or(native::Error::InvalidArgument)?;
-
-    let ObjectType::String(path) = &path_object.typ else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let Some(Primitive::Object(content_ptr)) = args.get(1).cloned() else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let content_object = vm
-        .objects()
-        .get(content_ptr as usize)
-        .ok_or(native::Error::InvalidArgument)?;
-
-    let ObjectType::String(content) = &content_object.typ else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let _ = fs::write(path, content);
-
-    Ok(Primitive::Empty)
-}
-
-pub const FILE_WRITE: NativeFunction = NativeFunction {
-    name: "file$write",
-    function: file_write,
-    arity: 2,
-    returns_value: false,
-    doc: Some(
-        "NativeFunction file$write: \n\targs: path (str), content (str)\n\tdesc: Writes <content> \
-         to file at <path>\n\tExample: `file$write('/home/sloth/todo.txt', 'Take a nap'); # \
-         todo.txt now contains the string 'Take a nap'`",
-    ),
-};
diff --git a/crates/sloth_vm/src/sloth_std/misc.rs b/crates/sloth_vm/src/sloth_std/misc.rs
deleted file mode 100644
index ca08d1d..0000000
--- a/crates/sloth_vm/src/sloth_std/misc.rs
+++ /dev/null
@@ -1,39 +0,0 @@
-use crate::native::{self, NativeFunction, NativeFunctionResult};
-use crate::value::{Object, ObjectType, Primitive};
-use crate::VM;
-
-fn get_doc(vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let Some(Primitive::Object(ptr)) = args.get(0).cloned() else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let object = vm
-        .objects()
-        .get(ptr as usize)
-        .ok_or(native::Error::InvalidArgument)?;
-
-    let ObjectType::NativeFunction(fnc) = &object.typ else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let docs = fnc
-        .doc
-        .expect("Oopsie Poopsie the stringy no worky")
-        .to_string();
-    let object = Object::new(ObjectType::String(docs));
-    let ptr = vm.objects_mut().allocate(object);
-
-    Ok(Primitive::Object(ptr as u32))
-}
-
-pub const DOCS: NativeFunction = NativeFunction {
-    name: "docs",
-    function: get_doc,
-    arity: 1,
-    returns_value: true,
-    doc: Some(
-        "NativeFunction docs: \n\targs: name (str)\n\tdesc: Returns documentaiton on a function \
-         with name <str>\n\tExample: `var doc = docs('wait'); # Returns the documentation of the \
-         'wait' function to doc`",
-    ),
-};
diff --git a/crates/sloth_vm/src/sloth_std/mod.rs b/crates/sloth_vm/src/sloth_std/mod.rs
deleted file mode 100644
index ff761a6..0000000
--- a/crates/sloth_vm/src/sloth_std/mod.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-use std::collections::HashMap;
-
-use once_cell::sync::Lazy;
-
-use crate::native::NativeFunction;
-
-pub mod file;
-pub mod misc;
-pub mod rand;
-pub mod stdio;
-pub mod term;
-pub mod time;
-
-pub static NATIVE_LIBRARY: Lazy<HashMap<&'static str, NativeFunction>> = Lazy::new(|| {
-    let mut map = HashMap::new();
-
-    // rand
-    map.insert("rand$gen", rand::GEN_FUNCTION);
-    map.insert("rand$gen_range", rand::GEN_RANGE_FUNCTION);
-
-    // stdio
-    map.insert("write", stdio::WRITE_FUNCTION);
-    map.insert("writeln", stdio::WRITELN_FUNCTION);
-    map.insert("read", stdio::READ_FUNCTION);
-
-    // term
-    map.insert("term$clear", term::TERM_CLEAR);
-    map.insert("term$setpos", term::TERM_SETPOS);
-
-    // filesystem
-    // TODO: Make the files commands work by making a global file variable with
-    // certain permissions created by 'file.open' instead of just reading the file.
-    map.insert("file$read", file::FILE_READ);
-    map.insert("file$write", file::FILE_WRITE);
-
-    // time
-    map.insert("wait", time::WAIT);
-
-    // doc
-    map.insert("docs", misc::DOCS);
-
-    map
-});
diff --git a/crates/sloth_vm/src/sloth_std/rand.rs b/crates/sloth_vm/src/sloth_std/rand.rs
deleted file mode 100644
index 870cca1..0000000
--- a/crates/sloth_vm/src/sloth_std/rand.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-use rand::Rng;
-
-use crate::native::{self, NativeFunction, NativeFunctionResult};
-use crate::value::Primitive;
-use crate::value::Primitive::{Float, Integer};
-use crate::VM;
-
-fn gen(_vm: &mut VM, _args: &[Primitive]) -> NativeFunctionResult {
-    let value = rand::thread_rng().gen_range(0.0..1.0);
-
-    Ok(Float(value))
-}
-
-pub const GEN_FUNCTION: NativeFunction = NativeFunction {
-    name: "rand$gen",
-    function: gen,
-    arity: 0,
-    returns_value: true,
-    doc: Some(
-        "NativeFunction rand$gen:\n\tdesc: Returns a random number in the range `0.0 .. \
-         1.0`\n\tExample: `var num = rand$gen(); # num could be any number from 0.0 to 1.0`",
-    ),
-};
-
-fn gen_range(_vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let min = args.get(0).cloned();
-    let max = args.get(1).cloned();
-
-    let (Some(Integer(min)), Some(Integer(max))) = (min, max) else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let value = rand::thread_rng().gen_range(min..max);
-
-    Ok(Integer(value))
-}
-
-pub const GEN_RANGE_FUNCTION: NativeFunction = NativeFunction {
-    name: "rand$gen_range",
-    function: gen_range,
-    arity: 2,
-    returns_value: true,
-    doc: Some(
-        "NativeFunction rand$gen_range: \n\targs: min (int), max (int)\n\tdesc: Returns a random \
-         numnber in the range <min> .. <max>\n\tExample: `var num = rand$gen_range(20, 76); # num \
-         could be any number from 20 to 76`",
-    ),
-};
diff --git a/crates/sloth_vm/src/sloth_std/stdio.rs b/crates/sloth_vm/src/sloth_std/stdio.rs
deleted file mode 100644
index f56b604..0000000
--- a/crates/sloth_vm/src/sloth_std/stdio.rs
+++ /dev/null
@@ -1,91 +0,0 @@
-use std::io::{stdin, BufRead};
-
-use crate::native::{self, NativeFunction, NativeFunctionResult};
-use crate::value::{Object, ObjectType, Primitive};
-use crate::VM;
-
-fn write(vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let Some(Primitive::Object(ptr)) = args.get(0).cloned() else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let object = vm
-        .objects()
-        .get(ptr as usize)
-        .ok_or(native::Error::InvalidArgument)?;
-
-    let ObjectType::String(str) = &object.typ else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    print!("{str}");
-
-    Ok(Primitive::Empty)
-}
-
-pub const WRITE_FUNCTION: NativeFunction = NativeFunction {
-    name: "write",
-    function: write,
-    arity: 1,
-    returns_value: false,
-    doc: Some(
-        "NativeFunction write: \n\targs: string (str)\n\tdesc: Writes <string> to the \
-         terminal.\n\tExample: `write(\"I'm sleepy...\"); # Output: I'm sleepy...`",
-    ),
-};
-
-fn writeln(vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let Some(Primitive::Object(ptr)) = args.get(0).cloned() else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    let object = vm
-        .objects()
-        .get(ptr as usize)
-        .ok_or(native::Error::InvalidArgument)?;
-
-    let ObjectType::String(str) = &object.typ else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    println!("{str}");
-
-    Ok(Primitive::Empty)
-}
-
-pub const WRITELN_FUNCTION: NativeFunction = NativeFunction {
-    name: "writeln",
-    function: writeln,
-    arity: 1,
-    returns_value: false,
-    doc: Some(
-        "NativeFunction writeln: \n\targs: string (str)\n\tdesc: Writes <string> to the terminal \
-         and starts a new line.\n\tExample: `writeln(\"I'm sleepy...\"); # Output: I'm \
-         sleepy...\n # This is a new line`",
-    ),
-};
-
-fn read(vm: &mut VM, _args: &[Primitive]) -> NativeFunctionResult {
-    let mut line = String::new();
-    stdin()
-        .lock()
-        .read_line(&mut line)
-        .map_err(|it| native::Error::Unknown(it.to_string()))?;
-
-    let object = Object::new(ObjectType::String(line));
-    let ptr = vm.objects_mut().allocate(object);
-
-    Ok(Primitive::Object(ptr as u32))
-}
-
-pub const READ_FUNCTION: NativeFunction = NativeFunction {
-    name: "read",
-    function: read,
-    arity: 0,
-    returns_value: true,
-    doc: Some(
-        "NativeFunction read:\n\tdesc: Reads input from the terminal and returns what was \
-         read.\n\tExample: `var input = read(); # Hello World <execute code> input = 'Hello \
-         World'`",
-    ),
-};
diff --git a/crates/sloth_vm/src/sloth_std/term.rs b/crates/sloth_vm/src/sloth_std/term.rs
deleted file mode 100644
index f61321c..0000000
--- a/crates/sloth_vm/src/sloth_std/term.rs
+++ /dev/null
@@ -1,41 +0,0 @@
-use crate::native::{self, NativeFunction, NativeFunctionResult};
-use crate::value::Primitive;
-use crate::value::Primitive::Integer;
-use crate::VM;
-
-pub const TERM_CLEAR: NativeFunction = NativeFunction {
-    name: "term$clear",
-    function: |_vm, _args| {
-        print!("\x1b[2J\x1b[H");
-        Ok(Primitive::Empty)
-    },
-    arity: 0,
-    returns_value: false,
-    doc: Some(
-        "NativeFunction term$clear: \n\tdesc: Clears the terminal\n\tExample: `term$clear(); # \
-         Clears the terminal`",
-    ),
-};
-
-fn term_setpos(_vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let x = args.get(0).cloned();
-    let y = args.get(1).cloned();
-
-    let (Some(Integer(x)), Some(Integer(y))) = (x, y) else {
-        return Err(native::Error::InvalidArgument);
-    };
-    print!("\x1b[{x};{y}H");
-    Ok(Primitive::Empty)
-}
-
-pub const TERM_SETPOS: NativeFunction = NativeFunction {
-    name: "term$setpos",
-    function: term_setpos,
-    arity: 2,
-    returns_value: false,
-    doc: Some(
-        "NativeFunction term$setpos: \n\targs: x (int), y (int)\n\tdesc: Sets the cursors \
-         position to (<x>, <y>)\n\tExample: `term$setpos(5, 17); # Sets the position of the \
-         cursor to (5, 17)`",
-    ),
-};
diff --git a/crates/sloth_vm/src/sloth_std/time.rs b/crates/sloth_vm/src/sloth_std/time.rs
deleted file mode 100644
index b27e0b5..0000000
--- a/crates/sloth_vm/src/sloth_std/time.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-use std::{thread, time};
-
-use crate::native::{self, NativeFunction, NativeFunctionResult};
-use crate::value::Primitive;
-use crate::value::Primitive::Integer;
-use crate::VM;
-
-fn wait(_vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
-    let sec = args.get(0).cloned();
-
-    let Some(Integer(sec)) = sec else {
-        return Err(native::Error::InvalidArgument);
-    };
-
-    thread::sleep(time::Duration::from_secs(sec.try_into().unwrap()));
-
-    Ok(Primitive::Empty)
-}
-
-pub const WAIT: NativeFunction = NativeFunction {
-    name: "wait",
-    function: wait,
-    arity: 1,
-    returns_value: false,
-    doc: Some(
-        "NativeFunction wait: \n\targs: sec (int)\n\tdesc: Waits for <sec> seconds.\n\tExample: \
-         `wait(10); # Waits 10 seconds`",
-    ),
-};
diff --git a/crates/sloth_vm/src/value.rs b/crates/sloth_vm/src/value.rs
deleted file mode 100644
index 4450b5a..0000000
--- a/crates/sloth_vm/src/value.rs
+++ /dev/null
@@ -1,53 +0,0 @@
-use crate::native::NativeFunction;
-use crate::Chunk;
-
-#[derive(Debug, Clone, Copy, PartialEq)]
-pub enum Primitive {
-    Integer(i128),
-    Float(f64),
-    Bool(bool),
-    /// Pointer to an object living on heap
-    Object(u32),
-    Empty,
-}
-
-pub struct Object {
-    /// If the object has been marked by the VM or not
-    pub(crate) marked: bool,
-    pub(crate) typ: ObjectType,
-}
-
-impl Object {
-    pub fn new(typ: ObjectType) -> Self {
-        Self { marked: false, typ }
-    }
-}
-
-pub enum ObjectType {
-    Box(Primitive),
-    String(String),
-    List(Vec<Primitive>),
-
-    Function(Function),
-    NativeFunction(NativeFunction),
-
-    Free { next: usize },
-}
-
-pub struct Function {
-    pub name: Option<String>,
-    pub chunk: Chunk,
-    pub arity: u8,
-    pub returns_value: bool,
-}
-
-impl Function {
-    pub fn root(chunk: Chunk) -> Self {
-        Self {
-            name: None,
-            chunk,
-            arity: 0,
-            returns_value: false,
-        }
-    }
-}
diff --git a/crates/sloth_vm/src/vm.rs b/crates/sloth_vm/src/vm.rs
deleted file mode 100644
index 3600719..0000000
--- a/crates/sloth_vm/src/vm.rs
+++ /dev/null
@@ -1,610 +0,0 @@
-use std::mem::MaybeUninit;
-
-use sloth_bytecode::Opcode;
-
-use crate::value::{Function, Object, ObjectType, Primitive};
-use crate::{native, vm, ObjectMap, Stack};
-
-#[derive(Clone, Copy)]
-pub struct CallFrame {
-    pointer: usize,
-    stack_offset: usize,
-    function: *const Function, // TODO: Safety
-}
-
-impl CallFrame {
-    fn new(stack_offset: usize, function: &Function) -> Self {
-        Self {
-            pointer: 0,
-            stack_offset,
-            function: function as *const _,
-        }
-    }
-
-    #[inline]
-    fn function(&self) -> &Function {
-        unsafe { &*self.function }
-    }
-}
-
-const CALL_STACK_SIZE: usize = 1024;
-
-pub struct CallStack {
-    top: usize,
-    frames: [MaybeUninit<CallFrame>; CALL_STACK_SIZE],
-}
-
-impl Default for CallStack {
-    fn default() -> Self {
-        Self {
-            top: 0,
-            frames: [MaybeUninit::uninit(); CALL_STACK_SIZE],
-        }
-    }
-}
-
-impl CallStack {
-    fn push(&mut self, frame: CallFrame) {
-        self.frames[self.top].write(frame);
-        self.top += 1;
-    }
-
-    fn pop(&mut self) {
-        self.top -= 1;
-    }
-
-    fn peek(&self) -> &CallFrame {
-        unsafe { self.frames[self.top - 1].assume_init_ref() }
-    }
-
-    fn peek_mut(&mut self) -> &mut CallFrame {
-        unsafe { self.frames[self.top - 1].assume_init_mut() }
-    }
-}
-
-// TODO: Fix visibility
-pub struct VM {
-    pub stack: Stack,
-    call_stack: CallStack,
-    pub objects: ObjectMap,
-}
-
-impl Default for VM {
-    fn default() -> Self {
-        Self::init(ObjectMap::default())
-    }
-}
-
-impl VM {
-    pub fn init(objects: ObjectMap) -> Self {
-        Self {
-            stack: Stack::default(),
-            call_stack: CallStack::default(),
-            objects,
-        }
-    }
-
-    pub fn new(objects: ObjectMap, mut root: Function) -> Self {
-        let mut this = Self::init(objects);
-
-        // Allocating the root function
-        root.chunk.code.push(Opcode::Halt as u8);
-        this.call_stack.push(CallFrame::new(0, &root));
-        this.objects
-            .allocate(Object::new(ObjectType::Function(root)));
-
-        this
-    }
-
-    pub fn step(&mut self) -> bool {
-        use Primitive::*;
-
-        let opcode = self.read_u8();
-
-        match Opcode::from_u8(opcode) {
-            Opcode::Constant => {
-                let idx = self.read_u16() as usize;
-                let value = self.call_stack.peek().function().chunk.constants[idx];
-
-                self.stack.push(value);
-            }
-
-            Opcode::Dup => {
-                let value = self.stack.pop();
-                self.stack.push(value);
-                self.stack.push(value);
-            }
-            Opcode::Pop => {
-                self.stack.pop();
-            }
-            Opcode::GetLocal => {
-                let idx = self.read_u16() as usize;
-                let value = self.stack[self.call_stack.peek().stack_offset + idx];
-
-                self.stack.push(value);
-            }
-            Opcode::SetLocal => {
-                let idx = self.read_u16() as usize;
-                let value = self.stack.pop();
-
-                self.stack[self.call_stack.peek().stack_offset + idx] = value;
-            }
-            Opcode::Box => {
-                // FIXME: TODO: MEGA CURSED
-                let pos = self.read_u16() as usize;
-                let value = self.stack.pop();
-
-                let object = vm::Object::new(ObjectType::Box(value));
-
-                self.objects.heap[pos] = object;
-                self.stack.push(Object(pos as u32));
-            }
-
-            Opcode::Add => {
-                let value = match self.stack.pop2() {
-                    (Integer(lhs), Integer(rhs)) => Integer(lhs + rhs),
-                    (Float(lhs), Float(rhs)) => Float(lhs + rhs),
-                    _ => panic!(),
-                };
-
-                self.stack.push(value);
-            }
-            Opcode::Sub => {
-                let value = match self.stack.pop2() {
-                    (Integer(lhs), Integer(rhs)) => Integer(lhs - rhs),
-                    (Float(lhs), Float(rhs)) => Float(lhs - rhs),
-                    _ => panic!(),
-                };
-
-                self.stack.push(value);
-            }
-            Opcode::Mul => {
-                let value = match self.stack.pop2() {
-                    (Integer(lhs), Integer(rhs)) => Integer(lhs * rhs),
-                    (Float(lhs), Float(rhs)) => Float(lhs * rhs),
-                    _ => panic!(),
-                };
-
-                self.stack.push(value);
-            }
-            Opcode::Div => {
-                let value = match self.stack.pop2() {
-                    (Integer(_), Integer(0)) => panic!("Divide by 0"),
-                    (Integer(lhs), Integer(rhs)) => Integer(lhs / rhs),
-                    (Float(lhs), Float(rhs)) => Float(lhs / rhs),
-                    _ => panic!(),
-                };
-
-                self.stack.push(value);
-            }
-            Opcode::Mod => {
-                let value = match self.stack.pop2() {
-                    (Integer(lhs), Integer(rhs)) => Integer(lhs % rhs),
-                    (Float(lhs), Float(rhs)) => Float(lhs % rhs),
-                    _ => panic!(),
-                };
-
-                self.stack.push(value);
-            }
-
-            Opcode::Eq => {
-                let value = match self.stack.pop2() {
-                    (Integer(lhs), Integer(rhs)) => Bool(lhs == rhs),
-                    (Float(lhs), Float(rhs)) => Bool(lhs == rhs),
-                    (Bool(lhs), Bool(rhs)) => Bool(lhs == rhs),
-                    (Object(lhs), Object(rhs)) => Bool(lhs == rhs),
-                    (Empty, Empty) => Bool(true),
-                    _ => Bool(false),
-                };
-
-                self.stack.push(value);
-            }
-            Opcode::Ne => {
-                let value = match self.stack.pop2() {
-                    (Integer(lhs), Integer(rhs)) => Bool(lhs != rhs),
-                    (Float(lhs), Float(rhs)) => Bool(lhs != rhs),
-                    (Bool(lhs), Bool(rhs)) => Bool(lhs != rhs),
-                    (Object(lhs), Object(rhs)) => Bool(lhs != rhs),
-                    (Empty, Empty) => Bool(false),
-                    _ => Bool(false),
-                };
-
-                self.stack.push(value);
-            }
-
-            Opcode::Jump => {
-                let to = self.read_u16();
-                self.call_stack.peek_mut().pointer = to as usize;
-            }
-            Opcode::JumpIf => {
-                let to = self.read_u16();
-                let value = self.stack.pop();
-
-                if let Bool(true) = value {
-                    self.call_stack.peek_mut().pointer = to as usize;
-                }
-            }
-
-            Opcode::Call => {
-                let Primitive::Object(ptr) = self.stack.pop() else {
-                    panic!("Last element on stack was not an object");
-                };
-
-                self.call(ptr as usize);
-            }
-
-            Opcode::Return => {
-                self.call_return();
-            }
-
-            Opcode::Halt => return false,
-
-            opcode => unimplemented!("Opcode {:?} unimplemented", opcode),
-        }
-
-        true
-    }
-
-    pub fn run(&mut self) {
-        while self.step() {}
-    }
-
-    pub fn call(&mut self, ptr: usize) {
-        let Some(obj) = self.objects.get(ptr) else {
-            panic!("Pointer referenced nothing");
-        };
-
-        match &obj.typ {
-            ObjectType::Function(function) => {
-                // Add a callstack entry for the function
-                let offset = self.stack.top - (function.arity as usize);
-                self.call_stack.push(CallFrame::new(offset, function));
-            }
-            ObjectType::NativeFunction(function) => {
-                let mut args = Vec::with_capacity(function.arity as usize);
-                for _ in 0..function.arity {
-                    args.push(self.stack.pop());
-                }
-
-                let name = function.name;
-                let returns_value = function.returns_value;
-
-                let internal = function.function;
-                let result = internal(self, &args);
-
-                match result {
-                    Ok(value) => {
-                        if returns_value {
-                            self.stack.push(value);
-                        }
-                    }
-                    Err(error) => match error {
-                        native::Error::InvalidArgument => {
-                            panic!("Invalid argument provided to '{name}'");
-                        }
-                        native::Error::Unknown(msg) => {
-                            panic!("Native function '{name}' failed due to '{msg}'");
-                        }
-                    },
-                }
-            }
-            _ => panic!("Object was not a function"),
-        }
-    }
-
-    fn call_return(&mut self) {
-        let function = self.call_stack.peek().function();
-        let stack_offset = self.call_stack.peek().stack_offset;
-
-        let return_value = if function.returns_value {
-            Some(self.stack.pop())
-        } else {
-            None
-        };
-
-        self.stack.top = stack_offset;
-
-        if let Some(return_value) = return_value {
-            self.stack.push(return_value);
-        }
-
-        self.call_stack.pop();
-    }
-
-    fn unwind(&mut self) {
-        unimplemented!("Implement unwinding for error handling");
-    }
-
-    #[inline(always)]
-    fn read_u8(&mut self) -> u8 {
-        let frame = self.call_stack.peek_mut();
-        let function = frame.function();
-        let byte = function.chunk.code[frame.pointer];
-        frame.pointer += 1;
-        byte
-    }
-
-    #[inline(always)]
-    fn read_u16(&mut self) -> u16 {
-        let frame = self.call_stack.peek_mut();
-        let chunk = &frame.function().chunk;
-
-        let bytes = (chunk.code[frame.pointer], chunk.code[frame.pointer + 1]);
-
-        frame.pointer += 2;
-
-        ((bytes.0 as u16) << 8) + (bytes.1 as u16)
-    }
-
-    #[inline(always)]
-    pub fn objects(&self) -> &ObjectMap {
-        &self.objects
-    }
-
-    #[inline(always)]
-    pub fn objects_mut(&mut self) -> &mut ObjectMap {
-        &mut self.objects
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use crate::value::{Function, Object, ObjectType, Primitive};
-    use crate::{sloth_std, Chunk, ObjectMap, VM};
-
-    #[test]
-    fn arithmetic_ops() {
-        // Addition
-        let mut vm = VM::new(
-            ObjectMap::default(),
-            Function::root(Chunk {
-                constants: vec![Primitive::Integer(7)],
-                code: vec![
-                    0x00, 0, 0,    // Load constant from 0
-                    0x10, // Duplicate
-                    0x20, // Add
-                    0xE0,
-                ],
-            }),
-        );
-
-        vm.run();
-        assert_eq!(vm.stack.peek(), Primitive::Integer(14));
-
-        let mut vm = VM::new(
-            ObjectMap::default(),
-            Function::root(Chunk {
-                constants: vec![Primitive::Integer(2), Primitive::Integer(11)],
-                code: vec![
-                    0x00, 0, 0, // Load constant from 0
-                    0x00, 0, 1,    // Load constant from 1
-                    0x20, // Add
-                    0xE0,
-                ],
-            }),
-        );
-
-        vm.run();
-        assert_eq!(vm.stack.peek(), Primitive::Integer(13));
-    }
-
-    #[test]
-    fn basic_function() {
-        let mut vm = VM::new(
-            ObjectMap::from(vec![Object::new(ObjectType::Function(Function {
-                name: Some("add".to_string()),
-                chunk: Chunk {
-                    constants: vec![],
-                    code: vec![0x14, 0, 0, 0x14, 0, 1, 0x20, 0x52],
-                },
-                arity: 2,
-                returns_value: true,
-            }))]),
-            Function::root(Chunk {
-                constants: vec![
-                    Primitive::Integer(6),
-                    Primitive::Integer(3),
-                    Primitive::Object(0),
-                    Primitive::Object(1),
-                    Primitive::Object(2),
-                ],
-                code: vec![
-                    0x00, 0, 0, // Load first function parameter from 0
-                    0x00, 0, 1, // Load second function parameter from 1
-                    0x00, 0, 2,    // Load function constant from 2
-                    0x50, // Call function
-                ],
-            }),
-        );
-
-        vm.run();
-
-        assert_eq!(vm.stack.peek(), Primitive::Integer(9));
-    }
-
-    #[test]
-    fn native_function() {
-        let mut vm = VM::new(
-            ObjectMap::from(vec![
-                Object::new(ObjectType::NativeFunction(sloth_std::rand::GEN_FUNCTION)),
-                Object::new(ObjectType::NativeFunction(
-                    sloth_std::rand::GEN_RANGE_FUNCTION,
-                )),
-            ]),
-            Function::root(Chunk {
-                constants: vec![
-                    Primitive::Object(0),
-                    Primitive::Object(1),
-                    Primitive::Integer(5),
-                    Primitive::Integer(10),
-                ],
-                code: vec![
-                    // First part
-                    0x00, 0, 0,    //
-                    0x50, //
-                    0xE0, //
-                    // Second part
-                    0x00, 0, 3, //
-                    0x00, 0, 2, //
-                    0x00, 0, 1,    //
-                    0x50, //
-                ],
-            }),
-        );
-
-        vm.run();
-
-        assert!({
-            let Primitive::Float(i) = vm.stack.peek() else { panic!(); };
-            (0.0..=1.0).contains(&i)
-        });
-
-        vm.run();
-
-        assert!({
-            let Primitive::Integer(i) = vm.stack.peek() else { panic!(); };
-            (5..10).contains(&i)
-        });
-    }
-
-    #[test]
-    fn fibonacci() {
-        #[rustfmt::skip]
-        let mut vm = VM::new(
-            ObjectMap::default(),
-            Function::root(Chunk {
-                constants: vec![
-                    Primitive::Integer(0),
-                    Primitive::Integer(1),
-                    Primitive::Integer(10),
-                ],
-                code: vec![
-                    // Load variables
-                    0x00, 0, 0,  // 0  Index
-                    0x00, 0, 0,  // 3  Me
-                    0x00, 0, 0,  // 6  Parent
-                    0x00, 0, 1,  // 9  Grandparent
-
-                    // Load parent and grandparent, sum them and put the value in me
-                    0x14, 0, 2,  // 12
-                    0x14, 0, 3,  // 15
-                    0x20,        // 16
-                    0x15, 0, 1,  // 19
-                    
-                    // Set grandparent to parent
-                    0x14, 0, 2,  // 22
-                    0x15, 0, 3,  // 25
-                    
-                    // Set parent to me
-                    0x14, 0, 1,  // 28
-                    0x15, 0, 2,  // 31
-
-                    // Increment Index by 1
-                    0x00, 0, 1,  // 34
-                    0x14, 0, 0,  // 37 Index
-                    0x20,        // 40
-                    0x15, 0, 0,  // 41 Index
-
-                    // Load me
-                    0x14, 0, 1,  // 44
-                    0xE0,        // 47
-                    0x11,        // 48
-
-                    // Repeat until Index is 9
-                    0x00, 0, 2,  // 49 
-                    0x14, 0, 0,  // 52 Index
-                    0x31,        // 55
-                    0x41, 0, 12, // 56
-                ],
-            }),
-        );
-
-        let mut values = Vec::new();
-        for _ in 0..10 {
-            vm.run();
-            values.push(vm.stack.peek());
-        }
-
-        assert_eq!(&values, &[
-            Primitive::Integer(1),
-            Primitive::Integer(1),
-            Primitive::Integer(2),
-            Primitive::Integer(3),
-            Primitive::Integer(5),
-            Primitive::Integer(8),
-            Primitive::Integer(13),
-            Primitive::Integer(21),
-            Primitive::Integer(34),
-            Primitive::Integer(55),
-        ]);
-    }
-
-    #[test]
-    fn fibonacci_recursive() {
-        #[rustfmt::skip]
-        let mut vm = VM::new(
-            ObjectMap::from(vec![Object::new(ObjectType::Function(Function {
-                name: Some("fib".to_owned()),
-                chunk: Chunk {
-                    constants: vec![
-                        Primitive::Object(0),
-                        Primitive::Integer(0),
-                        Primitive::Integer(1),
-                        Primitive::Integer(2),
-                    ],
-                    code: vec![
-                        0x14, 0, 0,  // 0
-                        0x00, 0, 1,  // 3
-                        0x31,        // 6
-                        0x41, 0, 14, // 7
-                        0x00, 0, 1,  // 10
-                        0x52,        // 13
-
-                        0x14, 0, 0,  // 14
-                        0x00, 0, 2,  // 17
-                        0x31,        // 20
-                        0x41, 0, 28, // 21
-                        0x00, 0, 2,  // 24
-                        0x52,        // 27
-
-                        // fib(n - 1)
-                        0x00, 0, 2,  // 28
-                        0x14, 0, 0,  // 31
-                        0x21,        // 34
-                        0x00, 0, 0,  // 35
-                        0x50,        // 38
-                        
-                        // fib(n - 2)
-                        0x00, 0, 3,  // 39
-                        0x14, 0, 0,  // 42
-                        0x21,        // 45
-                        0x00, 0, 0,  // 46
-                        0x50,        // 49
-
-                        // add & return
-                        0x20,        // 50
-                        0x52,        // 51
-                    ],
-                },
-                arity: 1,
-                returns_value: true,
-            }))]),
-            Function::root(Chunk {
-                constants: vec![
-                    Primitive::Object(0),
-                    Primitive::Integer(10),
-                ],
-                code: vec![
-                    // Load n and the function and call it
-                    0x00, 0, 1, // 0
-                    0x00, 0, 0, // 3
-                    0x50,       // 6
-                ],
-            }),
-        );
-
-        vm.run();
-
-        assert_eq!(Primitive::Integer(55), vm.stack.peek());
-    }
-}