Add lint warning for escaped newlines.

4 files changed, 11 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 68210057..1ce666c6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2018-08-02         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* awkgram.y (yylex): Add lint warning upon encountering escaped
+	physical newlines in a string.
+	* node.c (make_str_node): Ditto.
+
 2018-07-31         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* interpret.h (unfield): Add a call to force_string() on
diff --git a/awkgram.c b/awkgram.c
index 10c55fa4..3abb2e16 100644
--- a/awkgram.c
+++ b/awkgram.c
@@ -6274,6 +6274,8 @@ retry:
 				if (c == '\n') {
 					if (do_posix)
 						fatal(_("POSIX does not allow physical newlines in string values"));
+					else if (do_lint)
+						lintwarn(_("backslash string continuation is not portable"));
 					sourceline++;
 					continue;
 				}
diff --git a/awkgram.y b/awkgram.y
index f3d3b38b..995b8bda 100644
--- a/awkgram.y
+++ b/awkgram.y
@@ -3854,6 +3854,8 @@ retry:
 				if (c == '\n') {
 					if (do_posix)
 						fatal(_("POSIX does not allow physical newlines in string values"));
+					else if (do_lint)
+						lintwarn(_("backslash string continuation is not portable"));
 					sourceline++;
 					continue;
 				}
diff --git a/node.c b/node.c
index 4ad41ef1..2f9e6d4c 100644
--- a/node.c
+++ b/node.c
@@ -450,7 +450,7 @@ make_str_node(const char *s, size_t len, int flags)
 				c = parse_escape(&pf);
 				if (c < 0) {
 					if (do_lint)
-						lintwarn(_("backslash at end of string"));
+						lintwarn(_("backslash string continuation is not portable"));
 					if ((flags & ELIDE_BACK_NL) != 0)
 						continue;
 					c = '\\';