Defines the %target-playground-build-run-swift macro in the local lit config for PlaygroundTransform which contains all the boilerplate code used by most PlaygroundTransform tests:
* Build a PlaygroundSupport module
* Build the test source into an executable, linking PlaygroundSupport
* Codesign and run the executable
The problem here is when wrapping a type that has constructors and destructors inside another type.
The reason is that the playground transform uses an `ASTWalker` to get to the top-level structure, but then once it’s inside a type, it does directly nested transformDecl() calls. And that inner check was for too narrow of a type.
The problem in this case was that the `dyn_cast<FuncDecl>(D)` was too narrow and didn’t include constructors/destructors. We want `dyn_cast<AbstractFunctionDecl>(D)`.
We should probably resolve this duality (using an `ASTWalker` to get to the top-level decls but then using directly nested calls below) at some point, but that’s a larger change, and so the specific problem covered by this commit is worth addressing with this safer short-term fix.
Changes:
- change a `dyn_cast<FuncDecl>` to a `dyn_cast<AbstractFunctionDecl>` in PlaygroundTransform.cpp
- add a unit test nested init and deinit (this test also tests the unnested case)
rdar://137316110
