diff --git a/Cargo.lock b/Cargo.lock
index 322c5d4..71273b1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,96 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8716408b8bc624ed7f65d223ddb9ac2d044c0547b6fa4b0d554f3a9540496ada"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "cc"
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+checksum = "7bbb73db36c1246e9034e307d0fba23f9a2e251faa47ade70c1bd252220c8311"
+
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+checksum = "df29b4f2f4e8a5f7871ccad859aa17a171ba251da96bfd55224d53f48a96d2a2"
+dependencies = [
+ "cc",
+ "lazy_static",
+ "libc",
+ "regex",
+ "semver",
+]
+
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+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+ "thread_local",
+]
+
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+ "semver-parser",
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+
 [[package]]
 name = "serene"
 version = "0.1.0"
+dependencies = [
+ "llvm-sys",
+]
+
+[[package]]
+name = "thread_local"
+version = "1.0.1"
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+ "lazy_static",
+]
diff --git a/Cargo.toml b/Cargo.toml
index eb6c23d..5c90b8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+llvm-sys = "100"
\ No newline at end of file
diff --git a/src/ast.rs b/src/ast.rs
index eaa0111..2085012 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -41,5 +41,5 @@ pub enum Expr {
 
 #[derive(Debug, Eq, PartialEq, Clone)]
 pub enum Error {
-    SyntaxError
+    SyntaxError,
 }
diff --git a/src/core.rs b/src/core.rs
new file mode 100644
index 0000000..6f72261
--- /dev/null
+++ b/src/core.rs
@@ -0,0 +1,3 @@
+pub trait Expression {
+    fn gen_code(&self);
+}
diff --git a/src/main.rs b/src/main.rs
index 83b8006..c65056f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,14 +1,13 @@
+extern crate llvm_sys;
+
 use std::string::String;
 
 pub mod ast;
-pub mod reader;
 pub mod collections;
-
-
+pub mod reader;
 
 fn main() {
     let input = String::from("(println \">>>>>\" '(+ 2 -3))");
 
-    println!("{:?}",
-             reader::read_string(&input).unwrap());
+    println!("{:?}", reader::read_string(&input).unwrap());
 }