From ca75036d4324da0526ba55da3b632ada2cd7e49c Mon Sep 17 00:00:00 2001
From: Peter Rice <peterrice@fastmail.com>
Date: Tue, 16 Sep 2025 03:31:59 -0400
Subject: [PATCH] handle comments before eof

---
 lox/scanner.janet       |  2 +-
 test/test_scanner.janet | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/lox/scanner.janet b/lox/scanner.janet
index d13d959..7f54683 100644
--- a/lox/scanner.janet
+++ b/lox/scanner.janet
@@ -31,7 +31,7 @@
     :number (<- (* :d+ (? (* "." :d+))))
     :string (* `"` (+ (<- (to `"`)) (error (constant "unterminated string"))) `"`)
     :main (any (+ :s
-                  (* "//" (to "\n"))
+                  (* "//" (any (if-not "\n" 1)))
                   ,;(seq [[str tok] :pairs double-operators] (token0 str tok))
                   ,;(seq [[str tok] :pairs single-operators] (token0 str tok))
                   ,(token1 :keyword-or-ident get-keyword)
diff --git a/test/test_scanner.janet b/test/test_scanner.janet
index 364cfd0..5407ebd 100644
--- a/test/test_scanner.janet
+++ b/test/test_scanner.janet
@@ -36,3 +36,19 @@
         {:line 1 :token [:nil]}
         {:line 1 :token [:semicolon]}
         {:line 1 :token [:right-brace]}])
+(test (scan `var a = 1 + 2;
+            // commented
+            a = 4;`)
+      @[{:line 1 :token [:var]}
+        {:line 1 :token [:ident "a"]}
+        {:line 1 :token [:eq]}
+        {:line 1 :token [:num 1]}
+        {:line 1 :token [:plus]}
+        {:line 1 :token [:num 2]}
+        {:line 1 :token [:semicolon]}
+        {:line 3 :token [:ident "a"]}
+        {:line 3 :token [:eq]}
+        {:line 3 :token [:num 4]}
+        {:line 3 :token [:semicolon]}])
+(test (scan "// var a = 1 + 2;")
+      @[])
-- 
2.51.2