From 7073e571230072554ff787ca65f530f1a2c19b4d Mon Sep 17 00:00:00 2001
From: Alpha Chen <alpha@kejadlen.dev>
Date: Tue, 11 Oct 2022 14:04:37 -0700
Subject: [PATCH] mu

---
 README.md         |  1 +
 rust/Cargo.lock   | 65 +++++++++++++++++++++++++++++++++++++++++++++++
 rust/Cargo.toml   |  2 ++
 rust/src/chunk.rs |  9 +++----
 rust/src/main.rs  |  7 ++++-
 rust/src/vm.rs    | 33 ++++++++++++++++++++++++
 6 files changed, 111 insertions(+), 6 deletions(-)
 create mode 100644 rust/src/vm.rs

diff --git a/README.md b/README.md
index c9e94c0..fe14bab 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Crafting Interpreters
 
 - [Crafting Interpreters](https://craftinginterpreters.com/)
+- [Source repo](https://github.com/munificent/craftinginterpreters)
 
 ## Installing Lox
 
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index 661ac0d..dc38768 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -2,6 +2,71 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "anyhow"
+version = "1.0.62"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1485d4d2cc45e7b201ee3767015c96faa5904387c9d87c6efdd0fb511f12d305"
+
 [[package]]
 name = "lox"
 version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "thiserror",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.99"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5f6586b7f764adc0231f4c79be7b920e766bb2f3e51b3661cdb263828f19994"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12bafc5b54507e0149cdf1b145a5d80ab80a90bcd9275df43d4fff68460f6c21"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index f6e02e9..f3c3d52 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -6,3 +6,5 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+anyhow = "1.0.62"
+thiserror = "1.0.32"
diff --git a/rust/src/chunk.rs b/rust/src/chunk.rs
index 934c51e..688764f 100644
--- a/rust/src/chunk.rs
+++ b/rust/src/chunk.rs
@@ -15,7 +15,7 @@ type Value = f32;
 
 #[derive(Default)]
 pub struct Chunk {
-    code: Vec<u8>,
+    pub code: Vec<u8>,
     constants: Vec<Value>,
     lines: Lines,
 }
@@ -74,7 +74,7 @@ impl Chunk {
     }
 
     fn constant_instruction(&self, name: &str, offset: usize) -> usize {
-        let constant_index = self.code[offset+1];
+        let constant_index = self.code[offset + 1];
         let value = self.constants[constant_index as usize];
         println!("{:<16} {:>4} '{}'", name, constant_index, value);
         offset + 2
@@ -82,7 +82,7 @@ impl Chunk {
 
     fn constant_long_instruction(&self, name: &str, offset: usize) -> usize {
         let index_len = mem::size_of::<usize>();
-        let index_bytes = &self.code[offset+1..offset+1+index_len];
+        let index_bytes = &self.code[offset + 1..offset + 1 + index_len];
 
         let (int_bytes, _) = index_bytes.split_at(std::mem::size_of::<usize>());
         let constant_index = usize::from_ne_bytes(int_bytes.try_into().unwrap());
@@ -108,7 +108,7 @@ fn test_constant_long() {
 
 // Lines are stored using run-length encoding, where the first element is the line and the second
 // element the number of instructions that are associated with that line
-#[derive(Default, Debug)]
+#[derive(Debug, Default)]
 struct Lines(std::vec::Vec<(usize, usize)>);
 
 impl Lines {
@@ -146,4 +146,3 @@ fn test_get_line() {
     assert_eq!(lines.get(2), (2, true));
     assert_eq!(lines.get(3), (2, false));
 }
-
diff --git a/rust/src/main.rs b/rust/src/main.rs
index 6ed152f..2ec0252 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -1,7 +1,9 @@
 use chunk::{Chunk, OpCode};
+use vm::VM;
 
 pub mod chunk;
 pub mod vec;
+pub mod vm;
 
 fn main() {
     let mut chunk = Chunk::default();
@@ -16,5 +18,8 @@ fn main() {
 
     // chunk.write_constant(0.0, 123);
 
-    chunk.disassemble("test chunk");
+    // chunk.disassemble("test chunk");
+
+    let vm = VM::new(chunk);
+    vm.interpret();
 }
diff --git a/rust/src/vm.rs b/rust/src/vm.rs
new file mode 100644
index 0000000..8b61340
--- /dev/null
+++ b/rust/src/vm.rs
@@ -0,0 +1,33 @@
+use std::ptr;
+
+use anyhow::Result;
+use thiserror::Error;
+
+use crate::chunk::Chunk;
+
+pub struct VM {
+    chunk: Chunk,
+    ip: *const u8,
+}
+
+#[derive(Error, Debug)]
+pub enum DataStoreError {
+    #[error("")]
+    CompileError,
+    #[error("")]
+    RuntimeError,
+}
+
+impl VM {
+    pub fn new(chunk: Chunk) -> Self {
+        VM { chunk, ip: &chunk.code.ptr }
+    }
+
+    pub fn interpret(&self) -> Result<()> {
+        self.run()
+    }
+
+    fn run(&self) -> Result<()> {
+        todo!()
+    }
+}