GPU Foreach Parsing and Checking (#1482)

This PR introduces parsing and semantic checking for a GPU foreach loop
for heterogeneouis programming. A GPU foreach loop takes the form:
```
__GPU_FOREACH(renderer, gridDims, LAMBDA(uint3 dispatchThreadID) {
        kernelCall(args, ...); });
```

And will allow the host code to call into a kernel with the correct
renderer and grid dimensions. This commit also introduces a hack to
unify types in the heterogeneous hello world file, which will hopefully
be amended in the future.

Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/source/slang/slang-check-impl.h b/source/slang/slang-check-impl.h
index 97e77ec3e..19f5553c7 100644
--- a/source/slang/slang-check-impl.h
+++ b/source/slang/slang-check-impl.h
@@ -1596,6 +1596,8 @@ namespace Slang
         void visitReturnStmt(ReturnStmt *stmt);
 
         void visitWhileStmt(WhileStmt *stmt);
+        
+        void visitGpuForeachStmt(GpuForeachStmt *stmt);
 
         void visitExpressionStmt(ExpressionStmt *stmt);
     };