Bug in compiler when the last line is a comment without newline

[adamritter]

This program works:

@main = 3
//

(newline after the comment)

But this HVML program doesn't:

@main = 3
//

(no newline after comment, I can't embed non-newline inside the bug report unfortunately)

�[1m
PARSE_ERROR�[0m

• expected:
• detected:
  2 | //

�[4m�[0m
hvml: key not found: "main"
CallStack (from HasCallStack):
error, called at src/HVML/Type.hs:398:17 in HVM3-0.1.0.0-inplace-hvml:HVML.Type

[ellie-bee]

I haven't had the chance to test yet, but I believe this will solve this problem.

diff --git a/src/HVML/Parse.hs b/src/HVML/Parse.hs
index b53d4a6..b4891eb 100644
--- a/src/HVML/Parse.hs
+++ b/src/HVML/Parse.hs
@@ -441,7 +441,7 @@ skip = skipMany (parseSpace <|> parseComment) where
   parseComment = (try $ do
     string "//"
     skipMany (noneOf "\n")
-    char '\n'
+    (char '\n' <|> eof)
     return ()) <?> "Comment"

 genFreshLabel :: ParserM Word64