Some basic parsing works (fixing order of operations), and one test case.

src/syntax/tokens.rs

@@ -2,11 +2,10 @@ use crate::util::istring::InternedString;
 use logos::{Lexer, Logos};
 use std::num::ParseIntError;
 
-#[derive(Logos,Clone,Debug,PartialEq)]
+#[derive(Logos, Clone, Debug, PartialEq)]
 pub enum Token {
     #[regex(r"[ \t\n\f]+", logos::skip)]
     #[regex(r"//.*", logos::skip)]
-
     #[token("=")]
     Equals,
 
@@ -37,10 +36,13 @@ impl Token {
     }
 }
 
-fn parse_number<'a,'src>(base: Option<u8>, value: &'a Lexer<'src, Token>) -> Result<(Option<u8>, i128), ParseIntError> {
+fn parse_number<'a, 'src>(
+    base: Option<u8>,
+    value: &'a Lexer<'src, Token>,
+) -> Result<(Option<u8>, i128), ParseIntError> {
     let (radix, strval) = match base {
-       None => (10, value.slice()),
-       Some(radix) => (radix, &value.slice()[2..]),
+        None => (10, value.slice()),
+        Some(radix) => (radix, &value.slice()[2..]),
     };
 
     println!("HERE! (radix {}, slice |{}|", radix, strval);
@@ -80,4 +82,3 @@ fn lexer_spans() {
     assert_eq!(lex0.next(), Some((Token::Number((None, 1)), 8..9)));
     assert_eq!(lex0.next(), None);
 }
-