diff --git a/src/codegen.rs b/src/codegen.rs
index 60bc459..56ed13c 100644
--- a/src/codegen.rs
+++ b/src/codegen.rs
@@ -25,8 +25,8 @@ impl<'a> Scope<'a> {
         self.named_vars.get(name)
     }
 
-    pub fn set(&mut self, name: &String, val: Value) -> Result<(), ()> {
-        if let hash_map::Entry::Vacant(e) = self.named_vars.entry(name.clone()) {
+    pub fn set(&mut self, name: &str, val: Value) -> Result<(), ()> {
+        if let hash_map::Entry::Vacant(e) = self.named_vars.entry(name.to_owned()) {
             e.insert(val);
             Ok(())
         } else {
@@ -86,8 +86,8 @@ impl Expression {
             },
             BlockExpr(_) => panic!("Not implemented!"),
             FunctionCall(_) => panic!("Not implemented!"),
-            VariableName(name) => scope.get(&name).cloned().unwrap(),
-            Literal(lit) => scope.block.get_const(&lit),
+            VariableName(name) => scope.get(name).cloned().unwrap(),
+            Literal(lit) => scope.block.get_const(lit),
         }
     }
 }
diff --git a/src/lexer.rs b/src/lexer.rs
index 7199c73..828c344 100644
--- a/src/lexer.rs
+++ b/src/lexer.rs
@@ -1,4 +1,4 @@
-use std::{fmt::Debug, iter::Peekable, str::Chars};
+use std::{fmt::Debug, str::Chars};
 
 static DECIMAL_NUMERICS: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
 
@@ -71,8 +71,6 @@ impl Debug for FullToken {
 
 pub type Position = (u32, u32);
 
-const EOF_CHAR: char = '\0';
-
 pub struct Cursor<'a> {
     pub position: Position,
     char_stream: Chars<'a>,
@@ -94,6 +92,7 @@ impl<'a> Cursor<'a> {
         self.char_stream.clone().next()
     }
 
+    #[allow(dead_code)] // Is this actually needed?
     fn second(&mut self) -> Option<char> {
         // `.next()` optimizes better than `.nth(1)`
         let mut stream = self.char_stream.clone();