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, 8 insertions, 0 deletions

diff --git a/tests/language-feature/higher-order-functions/overloaded.slang.expected b/tests/language-feature/higher-order-functions/overloaded.slang.expected
new file mode 100644
index 000000000..3d02bf06f
--- /dev/null
+++ b/tests/language-feature/higher-order-functions/overloaded.slang.expected
@@ -0,0 +1,8 @@
+result code = -1
+standard error = {
+tests/language-feature/higher-order-functions/overloaded.slang(17): error 39999: passing overloaded functions to higher order functions is not supported
+    return foo(bit<float>);
+              ^
+}
+standard output = {
+}