mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
3fa07a0e7a
`swift_willThrow` is called with an error right before it is thrown. This existing entrypoint requires an already-boxed error existential; with typed errors, we don't have the error existential on hand, so we would need to allocate the box to throw a typed error. That's not okay. Introduce a new `swift_willThrowTypedImpl` entry point into the runtime that will first check for the presence of an error handler and, if one is present, box the error to provide to the error handler. This maintains the no-allocations path for typed errors while still allowing existing error handlers to work. This new entrypoint isn't available on older Swift runtimes, so create a back-deployable shim called by the compiler. On new-enough platforms, this will call through to `swift_willThrowTypedImpl`. On older platforms, we drop the error and don't call the registered will-throw handler at all. This is a compromise that avoids boxing when throwing typed errors, at the cost of a slightly different experience for this new feature on older runtimes. Fixes rdar://119828459.
98 lines
3.8 KiB
C++
98 lines
3.8 KiB
C++
//===--- KnownDecls.def - Compiler declaration metaprogramming --*- C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines macros used for macro-metaprogramming with compiler-known
|
|
// declarations.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef FUNC_DECL
|
|
# define FUNC_DECL(Name, Id)
|
|
#endif
|
|
|
|
FUNC_DECL(ArrayForceCast, "_arrayForceCast")
|
|
FUNC_DECL(ArrayConditionalCast, "_arrayConditionalCast")
|
|
|
|
FUNC_DECL(DictionaryUpCast, "_dictionaryUpCast")
|
|
FUNC_DECL(DictionaryDownCast, "_dictionaryDownCast")
|
|
FUNC_DECL(DictionaryDownCastConditional, "_dictionaryDownCastConditional")
|
|
|
|
FUNC_DECL(SetUpCast, "_setUpCast")
|
|
FUNC_DECL(SetDownCast, "_setDownCast")
|
|
FUNC_DECL(SetDownCastConditional, "_setDownCastConditional")
|
|
|
|
FUNC_DECL(ConvertPointerToPointerArgument,
|
|
"_convertPointerToPointerArgument")
|
|
FUNC_DECL(ConvertInOutToPointerArgument,
|
|
"_convertInOutToPointerArgument")
|
|
FUNC_DECL(ConvertMutableArrayToPointerArgument,
|
|
"_convertMutableArrayToPointerArgument")
|
|
FUNC_DECL(ConvertConstArrayToPointerArgument,
|
|
"_convertConstArrayToPointerArgument")
|
|
FUNC_DECL(ConvertConstStringToUTF8PointerArgument,
|
|
"_convertConstStringToUTF8PointerArgument")
|
|
FUNC_DECL(AllocateUninitializedArray,
|
|
"_allocateUninitializedArray")
|
|
FUNC_DECL(DeallocateUninitializedArray,
|
|
"_deallocateUninitializedArray")
|
|
FUNC_DECL(FinalizeUninitializedArray,
|
|
"_finalizeUninitializedArray")
|
|
|
|
FUNC_DECL(ForceBridgeFromObjectiveC,
|
|
"_forceBridgeFromObjectiveC")
|
|
FUNC_DECL(ConditionallyBridgeFromObjectiveC,
|
|
"_conditionallyBridgeFromObjectiveC")
|
|
|
|
FUNC_DECL(ForceBridgeFromObjectiveCBridgeable,
|
|
"_forceBridgeFromObjectiveC_bridgeable")
|
|
FUNC_DECL(ConditionallyBridgeFromObjectiveCBridgeable,
|
|
"_conditionallyBridgeFromObjectiveC_bridgeable")
|
|
|
|
FUNC_DECL(BridgeAnythingToObjectiveC,
|
|
"_bridgeAnythingToObjectiveC")
|
|
FUNC_DECL(BridgeAnyObjectToAny,
|
|
"_bridgeAnyObjectToAny")
|
|
|
|
FUNC_DECL(ConvertToAnyHashable, "_convertToAnyHashable")
|
|
|
|
FUNC_DECL(WillThrowTyped, "_willThrowTyped")
|
|
|
|
FUNC_DECL(DiagnoseUnexpectedError, "_unexpectedError")
|
|
FUNC_DECL(DiagnoseUnexpectedErrorTyped, "_unexpectedErrorTyped")
|
|
FUNC_DECL(ErrorInMainTyped, "_errorInMainTyped")
|
|
FUNC_DECL(DiagnoseUnexpectedNilOptional, "_diagnoseUnexpectedNilOptional")
|
|
FUNC_DECL(DiagnoseUnexpectedEnumCase, "_diagnoseUnexpectedEnumCase")
|
|
FUNC_DECL(DiagnoseUnexpectedEnumCaseValue, "_diagnoseUnexpectedEnumCaseValue")
|
|
FUNC_DECL(DiagnoseUnavailableCodeReached, "_diagnoseUnavailableCodeReached")
|
|
FUNC_DECL(DiagnoseUnavailableCodeReachedAEIC, "_diagnoseUnavailableCodeReached_aeic")
|
|
|
|
FUNC_DECL(GetErrorEmbeddedNSError, "_getErrorEmbeddedNSError")
|
|
|
|
FUNC_DECL(UnsafeBitCast, "unsafeBitCast")
|
|
|
|
FUNC_DECL(GetAtKeyPath, "_getAtKeyPath")
|
|
FUNC_DECL(GetAtAnyKeyPath, "_getAtAnyKeyPath")
|
|
FUNC_DECL(GetAtPartialKeyPath, "_getAtPartialKeyPath")
|
|
FUNC_DECL(SetAtWritableKeyPath, "_setAtWritableKeyPath")
|
|
FUNC_DECL(SetAtReferenceWritableKeyPath, "_setAtReferenceWritableKeyPath")
|
|
// These don't actually have AST nodes associated with them right now.
|
|
FUNC_DECL(ReadAtKeyPath, "_readAtKeyPath")
|
|
FUNC_DECL(ModifyAtWritableKeyPath, "_modifyAtWritableKeyPath")
|
|
FUNC_DECL(ModifyAtReferenceWritableKeyPath, "_modifyAtReferenceWritableKeyPath")
|
|
|
|
FUNC_DECL(Swap, "swap")
|
|
|
|
FUNC_DECL(UnimplementedInitializer, "_unimplementedInitializer")
|
|
FUNC_DECL(Undefined, "_undefined")
|
|
|
|
#undef FUNC_DECL
|