[src/trunk]: src/tests/usr.bin/indent indent: demonstrate bug in parsing prep...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7572a93c64c0
branches:  trunk
changeset: 1024047:7572a93c64c0
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Oct 08 20:04:26 2021 +0000

description:
indent: demonstrate bug in parsing preprocessor lines

diffstat:

 tests/usr.bin/indent/token-preprocessing.0        |  25 ++++++++++++++++++++++-
 tests/usr.bin/indent/token-preprocessing.0.stdout |  25 ++++++++++++++++++++++-
 2 files changed, 48 insertions(+), 2 deletions(-)

diffs (72 lines):

diff -r b35e04a94ca2 -r 7572a93c64c0 tests/usr.bin/indent/token-preprocessing.0
--- a/tests/usr.bin/indent/token-preprocessing.0        Fri Oct 08 19:27:20 2021 +0000
+++ b/tests/usr.bin/indent/token-preprocessing.0        Fri Oct 08 20:04:26 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: token-preprocessing.0,v 1.3 2021/03/13 13:04:13 rillig Exp $ */
+/* $NetBSD: token-preprocessing.0,v 1.4 2021/10/08 20:04:26 rillig Exp $ */
 /* $FreeBSD$ */
 
 /*-
@@ -34,3 +34,26 @@
 
 #define comment_in_string_literal "/* no comment "
 int this_is_an_ordinary_line_again;
+
+/*
+ * Before indent.c 1.129 from 2021-10-08, indent mistakenly interpreted quotes
+ * in comments as starting a string literal. The '"' in the comment started a
+ * string, the next '"' finished the string, and the following '/' '*' was
+ * interpreted as the beginning of a comment. This comment lasted until the
+ * next '*' '/', which in this test is another preprocessor directive, solely
+ * for symmetry.
+ *
+ * The effect was that the extra space after d2 was not formatted, as that
+ * line was considered part of the comment.
+ */
+int d1 ;
+#define confuse_d /*"*/ "/*"
+int d2 ;
+#define resolve_d "*/"
+int d3 ;
+
+int s1 ;
+#define confuse_s /*'*/ '/*'
+int s2 ;
+#define resolve_s '*/'
+int s3 ;
diff -r b35e04a94ca2 -r 7572a93c64c0 tests/usr.bin/indent/token-preprocessing.0.stdout
--- a/tests/usr.bin/indent/token-preprocessing.0.stdout Fri Oct 08 19:27:20 2021 +0000
+++ b/tests/usr.bin/indent/token-preprocessing.0.stdout Fri Oct 08 20:04:26 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: token-preprocessing.0.stdout,v 1.4 2021/03/13 13:14:14 rillig Exp $ */
+/* $NetBSD: token-preprocessing.0.stdout,v 1.5 2021/10/08 20:04:26 rillig Exp $ */
 /* $FreeBSD$ */
 
 /*-
@@ -35,3 +35,26 @@
 
 #define comment_in_string_literal "/* no comment "
 int            this_is_an_ordinary_line_again;
+
+/*
+ * Before indent.c 1.129 from 2021-10-08, indent mistakenly interpreted quotes
+ * in comments as starting a string literal. The '"' in the comment started a
+ * string, the next '"' finished the string, and the following '/' '*' was
+ * interpreted as the beginning of a comment. This comment lasted until the
+ * next '*' '/', which in this test is another preprocessor directive, solely
+ * for symmetry.
+ *
+ * The effect was that the extra space after d2 was not formatted, as that
+ * line was considered part of the comment.
+ */
+int            d1;
+#define confuse_d /*"*/ "/*"
+int d2 ;
+#define resolve_d "*/"
+int            d3;
+
+int            s1;
+#define confuse_s /*'*/ '/*'
+int s2 ;
+#define resolve_s '*/'
+int            s3;