enum LibraryFeatures { static let weakRefs: Int32 = 1 << 0 } @_cdecl("_library_features") func _library_features() -> Int32 { var features: Int32 = 0 #if !JAVASCRIPTKIT_WITHOUT_WEAKREFS features |= LibraryFeatures.weakRefs #endif return features } #if compiler(>=6.0) && hasFeature(Embedded) // cdecls currently don't work in embedded, and expose for wasm only works >=6.0 @_expose(wasm, "swjs_library_features") public func _swjs_library_features() -> Int32 { _library_features() } #endif