MVP for higher order functions (#2849)

* MVP for higher order functions

* Add shader subgroup partitioned glsl intrinsics

* Implement parsing and checking for tuple types

Currently there is no way to do anything useful with them from the source language however

* neaten

* Correct precedence of function type parsing

* neaten

* higher order function tests

* function types of any arity

* Inference for higher order functions

* Add second test for unsynchronized params

* regenerate vs projects

* dx11 -> dx12 for saturated cooperations tests

* Disable saturated cooperation tests on vulkan

They fail on release builds in CI, not essential for the higher order function work however

* remove saturated-cooperation tests

* Remove unnecessary assert and clarify control flow in AddDeclRefOverloadCandidates

* Add Tuple type name mangling

* Use functype keyword to introduce function types

* Add more inference tests for hof

---------

Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/language-feature/higher-order-functions/inference.slang b/tests/language-feature/higher-order-functions/inference.slang
new file mode 100644
index 000000000..c01f5b19e
--- /dev/null
+++ b/tests/language-feature/higher-order-functions/inference.slang
@@ -0,0 +1,21 @@
+//TEST:SIMPLE:
+
+func x<A, B>(f : functype (A) -> B)
+{ }
+
+float f(int)
+{
+    return 0;
+}
+
+func y<A, B, C>(g : functype (A, B) -> C)
+{ }
+
+void g<A>(A, bool)
+{ }
+
+void main()
+{
+    x(f);
+    y(g<int>);
+}