Output default parameter values on language server hover (#6902)

* Output default parameter values on language server hover

Closes https://github.com/shader-slang/slang/issues/5782

* Add parens around binay expressions in ast print

* More cases in ast print test

* format code

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/language-server/default-values.slang b/tests/language-server/default-values.slang
new file mode 100644
index 000000000..abb08b6a8
--- /dev/null
+++ b/tests/language-server/default-values.slang
@@ -0,0 +1,13 @@
+//TEST(smoke):LANG_SERVER:
+
+void bar()
+{
+    foo(1, 2.0);
+//HOVER:5,5
+}
+
+void foo(int i = 0, float j = 1.0, int k = 1+1, int l = -10, int m = MY_CONST)
+{
+}
+
+const int MY_CONST = 10;