From 00eae58f256c6c7a09e9c9b72ac9fee5a98a17db Mon Sep 17 00:00:00 2001
From: oxalica <oxalicc@pm.me>
Date: Fri, 4 Aug 2023 17:29:44 +0800
Subject: [PATCH] Fix lexing of block comments

---
 crates/syntax/src/lexer.rs | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/crates/syntax/src/lexer.rs b/crates/syntax/src/lexer.rs
index c5862bf..85802f1 100644
--- a/crates/syntax/src/lexer.rs
+++ b/crates/syntax/src/lexer.rs
@@ -90,7 +90,7 @@ regex_dfa! {
     DEFAULT_TOKEN_DFA {
         // The order matters!
         SPACE = r"[ \r\n\t]+",
-        COMMENT = r"#.*|/\*([^*]|\*[^/])*\*/",
+        COMMENT = r"#.*|/\*([^*]|\*+[^/*])*\*+/",
         // N.B. Nix somehow accepts multiple slashes in path interpolation except the first
         // slash, but the first path fragment accepts at most 2 continuous slashes.
         //
@@ -623,4 +623,35 @@ mod tests {
             "#]],
         );
     }
+
+    #[test]
+    fn comment() {
+        check_lex(
+            "/*1/*2*/3*/4",
+            expect![[r#"
+                COMMENT "/*1/*2*/"
+                INT "3"
+                STAR "*"
+                PATH "/4"
+            "#]],
+        );
+        check_lex(
+            "1/**/2",
+            expect![[r#"
+                INT "1"
+                COMMENT "/**/"
+                INT "2"
+            "#]],
+        );
+        check_lex(
+            "1/*/2/**/3/***/4",
+            expect![[r#"
+                INT "1"
+                COMMENT "/*/2/**/"
+                INT "3"
+                COMMENT "/***/"
+                INT "4"
+            "#]],
+        );
+    }
 }