read identifier

src/main.rs

@@ -1,6 +1,20 @@
 mod lexer;
 mod token;
 
+use crate::lexer::LexerTraits;
+use lexer::new;
+
 fn main() {
-    println!("Hello, world!");
+    let input = "let five = 5;
+    let ten = 10;
+    let add = fn(x, y) {
+        x + y;
+    };
+    let result = add(five, ten);";
+
+    let mut l = new(input.to_string());
+
+    for (i, tok) in (0..10).map(|_| l.next_token()).enumerate() {
+        println!("{}: {:?}", i, tok.type_);
+    }
 }