Add test case for escaped newlines.

This also serves as a regression test for the recent preprocessor bug fix.

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/preprocessor/escaped-newlines.slang b/tests/preprocessor/escaped-newlines.slang
new file mode 100644
index 000000000..1c1fa8f10
--- /dev/null
+++ b/tests/preprocessor/escaped-newlines.slang
@@ -0,0 +1,23 @@
+//TEST:SIMPLE:
+
+// Test support for escaped newlines in macro definitions.
+//
+// A complete lexer would handle backslash-escaped newlines
+// in every possible context (including, e.g., in the middle
+// of an identifier), but we are not going to go to such
+// lengths right now.
+
+#define FOO(x, y) 	\
+	x				\
+	y				\
+	/* */
+
+FOO(float, bar)(float a)
+{
+	FOO(return, a);
+}
+
+float foo(float x)
+{
+	return bar(x);
+}