Changed most everything

src/parse/expression.rs

@@ -17,6 +17,7 @@ pub enum Expr {
     S(Vec<Expr>),
     Lambda(String, Option<Box<Expr>>, Vec<Expr>),
     Auto(Option<String>, Option<Box<Expr>>, Vec<Expr>),
+    
     Typed(Box<Expr>, Box<Expr>)
 }
 

src/parse/mod.rs

@@ -7,6 +7,7 @@ mod name;
 mod substitution;
 mod sourcefile;
 
+pub use substitution::Substitution;
 pub use expression::Expr;
 pub use expression::expression_parser;
 pub use sourcefile::FileEntry;