From 031b9dfee279a1314b5c76701bff016d69981aa8 Mon Sep 17 00:00:00 2001
From: eck <none@none>
Date: Tue, 10 Apr 1990 10:52:52 +0000
Subject: [PATCH] added warning for nested comment

---
 lang/cem/cpp.ansi/preprocess.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lang/cem/cpp.ansi/preprocess.c b/lang/cem/cpp.ansi/preprocess.c
index 1a31034ab..025af03e8 100644
--- a/lang/cem/cpp.ansi/preprocess.c
+++ b/lang/cem/cpp.ansi/preprocess.c
@@ -378,7 +378,7 @@ char *op;
 int *lineno;
 {
 	char *ob = &_obuf[OBUFSIZE];
-	register int c;
+	register int c, oldc = '\0';
 
 	NoUnstack++;
 	if (options['C']) {
@@ -410,8 +410,14 @@ int *lineno;
 					echo(c);
 				}
 				break;			/* for(;;) */
+			} else if (oldc == '/') {
+				warning("comment inside comment ?");
 			}
-		} else c = GetChar();
+			oldc = '*';
+		} else {
+			oldc = c;
+			c = GetChar();
+		}
 	}
 	NoUnstack--;
 	return op;
-- 
2.34.1