parser now bubbles errors instead of unit type

llvm added to dependencies

src/tests/literals.rs

@@ -1,6 +1,7 @@
 use lrlex::lrlex_mod;
 use lrpar::lrpar_mod;
 
+use crate::ast::errors::ParsingError;
 use crate::ast::{Expression, Literal, Program};
 
 lrlex_mod!("lexers/fudge.l");
@@ -21,19 +22,14 @@ macro_rules! test_literal_list {
     };
 }
 
-fn parse_expr(input: &str) -> Result<Expression, ()> {
+fn parse_expr(input: &str) -> Result<Expression, ParsingError> {
     let lexerdef = expr_only_l::lexerdef();
     let lexer = lexerdef.lexer(&input);
     let (res, errs) = expr_only_y::parse(&lexer);
-    if let Some(parsed_res) = res {
-        parsed_res
-    } else {
-        Err(())
-    }
+    res.expect("REASON")
 }
 #[test]
 fn test_int_literal() {
-
     let matches_parsed_int = |s: &str| match parse_expr(s) {
         Ok(i) => matches!(i, Expression::Lit(Literal::Int(_))),
         Err(_) => false,