Disable `class` keyword to define a new type (#2212)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Disable class keyword.

* Add class keyword test.

* Fix test diagnostic.

2 files changed, 18 insertions, 0 deletions

diff --git a/tests/diagnostics/class-keyword.slang b/tests/diagnostics/class-keyword.slang
new file mode 100644
index 000000000..c0495a614
--- /dev/null
+++ b/tests/diagnostics/class-keyword.slang
@@ -0,0 +1,10 @@
+//DIAGNOSTIC_TEST:SIMPLE:
+
+// `class` keyword is a reserved keyword in this context, and wso should produce an error.
+// It can be used in the form of `enum class` 
+
+class SomeClass
+{
+    int a;
+    int b;
+};
diff --git a/tests/diagnostics/class-keyword.slang.expected b/tests/diagnostics/class-keyword.slang.expected
new file mode 100644
index 000000000..9a3a07a63
--- /dev/null
+++ b/tests/diagnostics/class-keyword.slang.expected
@@ -0,0 +1,8 @@
+result code = -1
+standard error = {
+tests/diagnostics/class-keyword.slang(6): error 20014: 'class' is a reserved keyword in this context; use 'struct' instead.
+class SomeClass
+^~~~~
+}
+standard output = {
+}