[rlox] Implement Scanner

rlox/src/main.rs

@@ -1,5 +1,26 @@
 mod vm;
+mod lc;
 
+use std::env;
+
+fn repl() {
+}
+
+fn run_file() {
+
+}
 
 fn main() {
+
+    let num_args = env::args().len();
+
+    lc::compile("print(1+2*3)");
+
+    if num_args == 1 {
+        repl();
+    } else if num_args == 2 {
+        run_file();
+    } else {
+        println!("Usage: rlox [path]");
+    }
 }