[Runtime] Retrieve type metadata given a mangled name #13764
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The remote reflection library has a fantastic utility class, TypeDecoder, to take a mangled type and form an abstract type from it. Move this facility into the Demangling library so other clients can use it.
Introduce a standard library/runtime entry point that produces type metadata given a mangled name, based on the TypeDecoder logic lifted from the remote mirrors library. Implement support for tuple types as a proof-of-concept.
Fixes some issues in the type decoder with function flags not getting set when forming function types.
DougGregor
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…ed names. Introduce basic support for existential types (just Any and AnyObject), so we can test those, shared/owned parameters, and existential metatypes.
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@swift-ci please smoke test |
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@DougGregor assuming we had a slightly different metatype system like func subtype<T>(of type: Type<T>, named: String) -> AnyType<T>? I was referring to this idea. |
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I guess you could do it by calling |
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Start implementing support for computing a type given a mangled name at run time. This currently manifests as a very under implemented function in the standard library:
Use the same
TypeDecodermangled-name-to-type logic from the remote mirrors library, but within the Swift runtime, to provide the mapping, translating directly into runtime calls.As proof of concept, implement support for demangling tuple types within
_typeByMangledName.