From 5668b5d09ae8f942e79b6d4473ba285a496b9a57 Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Tue, 8 Jun 2021 14:32:42 -0400
Subject: [PATCH] c++: Test for whitespace and line splice

From wg21.link/P2223R2

gcc/testsuite/ChangeLog:

	* g++.dg/cpp23/whitespace-splice1.C: New test.
---
 gcc/testsuite/g++.dg/cpp23/whitespace-splice1.C | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/cpp23/whitespace-splice1.C

diff --git a/gcc/testsuite/g++.dg/cpp23/whitespace-splice1.C b/gcc/testsuite/g++.dg/cpp23/whitespace-splice1.C
new file mode 100644
index 0000000..f115ce0
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp23/whitespace-splice1.C
@@ -0,0 +1,15 @@
+// Tests from P2223R2
+// { dg-additional-options -w }
+// { dg-do compile { target c++11 } }
+
+constexpr auto str = "\ 
+";
+
+static_assert(__builtin_strlen(str) == 0, "");
+
+constexpr int i = 1
+  // \ 
+  + 42
+  ;
+
+static_assert(i == 1, "");
-- 
2.7.4