LanguageServer: Enhance auto completion for override. (#7465)

* Add additional completion keywords.

* LanguageServer: Enhance auto completion for `override`.

2 files changed, 44 insertions, 0 deletions

diff --git a/tests/diagnostics/interfaces/interface-override.slang b/tests/diagnostics/interfaces/interface-override.slang
new file mode 100644
index 000000000..12539895b
--- /dev/null
+++ b/tests/diagnostics/interfaces/interface-override.slang
@@ -0,0 +1,28 @@
+//DIAGNOSTIC_TEST:SIMPLE(filecheck=CHECK):
+
+interface IBase
+{
+    int f();
+}
+
+interface IDerived : IBase
+{
+    //CHECK-DAG: ([[# @LINE+1]]): error 30311:
+    __init() {}
+
+    property int value{
+        get;
+
+        //CHECK-DAG: ([[# @LINE+1]]): error 30311:
+        set{ }
+    }
+
+    __subscript(int index)->int
+    {
+        //CHECK-DAG: ([[# @LINE+1]]): error 30311:
+        get{}
+    }
+
+    //CHECK-DAG: ([[# @LINE+1]]): error 30312:
+    override int f() {}
+}
\ No newline at end of file
diff --git a/tests/language-server/override-completion.slang b/tests/language-server/override-completion.slang
new file mode 100644
index 000000000..7cfd52b3e
--- /dev/null
+++ b/tests/language-server/override-completion.slang
@@ -0,0 +1,16 @@
+//TEST:LANG_SERVER(filecheck=CHECK):
+interface IBar{}
+interface IFoo
+{
+    int eval();
+    void execute<int z,T:IBar>(int x);
+}
+
+struct Impl : IFoo
+{
+//COMPLETE:12,14
+    override 
+}
+
+//CHECK-DAG: int eval
+//CHECK-DAG: void execute<int z, T>
\ No newline at end of file