Add check for invalid use of modifiers. (#3402)

* Add check for invalid use of modifiers.

* Fixes.

* Add test.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/diagnostics/modifier-check.slang b/tests/diagnostics/modifier-check.slang
new file mode 100644
index 000000000..e42b2ae0e
--- /dev/null
+++ b/tests/diagnostics/modifier-check.slang
@@ -0,0 +1,9 @@
+//DIAGNOSTIC_TEST:SIMPLE(filecheck=CHECK):
+
+// CHECK: ([[# @LINE+1]]): error 31201
+layout(rgba8);
+Texture2D<float4> tex;
+
+// CHECK: ([[# @LINE+1]]): error 31202
+public internal int v()
+{}