From 332f60c19336252d907b83882aa70665ca93a9d2 Mon Sep 17 00:00:00 2001
From: Ellie Hermaszewska <ellieh@nvidia.com>
Date: Fri, 12 May 2023 04:33:21 +0800
Subject: 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>
---
 source/slang/slang-mangle.cpp | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

(limited to 'source/slang/slang-mangle.cpp')

diff --git a/source/slang/slang-mangle.cpp b/source/slang/slang-mangle.cpp
index a8ab98254..ef9bf4938 100644
--- a/source/slang/slang-mangle.cpp
+++ b/source/slang/slang-mangle.cpp
@@ -177,7 +177,7 @@ namespace Slang
             break;
 
         default:
-            SLANG_UNEXPECTED("unimplemented case in mangling");
+            SLANG_UNEXPECTED("unimplemented case in base type mangling");
             break;
         }
     }
@@ -238,9 +238,31 @@ namespace Slang
         {
             emitRaw(context, "E");
         }
+        else if (const auto bottomType = dynamicCast<BottomType>(type))
+        {
+            emitRaw(context, "B");
+        }
+        else if (auto funcType = dynamicCast<FuncType>(type))
+        {
+            emitRaw(context, "F");
+            auto n = funcType->getParamCount();
+            emit(context, n);
+            for(Index i = 0; i < n; ++i)
+                emitType(context, funcType->getParamType(i));
+            emitType(context, funcType->getResultType());
+            emitType(context, funcType->getErrorType());
+        }
+        else if (auto tupleType = dynamicCast<TupleType>(type))
+        {
+            emitRaw(context, "Tu");
+            auto n = tupleType->getMemberCount();
+            emit(context, n);
+            for(Index i = 0; i < n; ++i)
+                emitType(context, tupleType->getMember(i));
+        }
         else
         {
-            SLANG_UNEXPECTED("unimplemented case in mangling");
+            SLANG_UNEXPECTED("unimplemented case in type mangling");
         }
     }
 
@@ -307,7 +329,7 @@ namespace Slang
         }
         else
         {
-            SLANG_UNEXPECTED("unimplemented case in mangling");
+            SLANG_UNEXPECTED("unimplemented case in val mangling");
         }
     }
 
-- 
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