1 files changed, 32 insertions, 0 deletions
diff --git a/tests/preprocessor/undef.slang b/tests/preprocessor/undef.slang
new file mode 100644
index 000000000..42ce05be7
--- /dev/null
+++ b/tests/preprocessor/undef.slang
@@ -0,0 +1,32 @@
+//TEST:SIMPLE:
+// #undef support
+
+// warning: undef of something not defined
+#undef FOO
+
+#define BAR 1.0f
+
+float foo() { return BAR + 2.0; }
+
+#ifdef BAR
+// okay
+#else
+#error not okay
+#endif
+
+#undef BAR
+
+typedef float BAR;
+
+BAR bar() { return 2.0; }
+
+#if !defined(BAR)
+// okay
+#else
+#error not okay
+#endif
+
+
+#define FOO
+
+#undef FOO