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Revert SE-0283 (#34492)

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Reverted despite build failures.
This commit is contained in:
Alejandro Alonso
2020-10-29 20:32:06 -04:00
committed by GitHub
parent 142b726708
commit 424802fb34
55 changed files with 100 additions and 3033 deletions
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29
lib/AST/Module.cpp
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@@ -2,7 +2,7 @@
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
// 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
@@ -1013,33 +1013,6 @@ LookupConformanceInModuleRequest::evaluate(
if (type->is<UnresolvedType>())
return ProtocolConformanceRef(protocol);
// Tuples have builtin conformances implemented within the runtime.
// These conformances so far consist of Equatable, Comparable, and Hashable.
if (auto tuple = type->getAs<TupleType>()) {
auto equatable = ctx.getProtocol(KnownProtocolKind::Equatable);
auto comparable = ctx.getProtocol(KnownProtocolKind::Comparable);
auto hashable = ctx.getProtocol(KnownProtocolKind::Hashable);
if (protocol != equatable && protocol != comparable && protocol != hashable)
return ProtocolConformanceRef::forInvalid();
SmallVector<ProtocolConformanceRef, 4> elementConformances;
// Ensure that every element in this tuple conforms to said protocol.
for (auto eltTy : tuple->getElementTypes()) {
auto conformance = mod->lookupConformance(eltTy, protocol);
if (conformance.isInvalid())
return ProtocolConformanceRef::forInvalid();
elementConformances.push_back(conformance);
}
auto conformance = ctx.getBuiltinConformance(tuple, protocol,
elementConformances);
return ProtocolConformanceRef(conformance);
}
auto nominal = type->getAnyNominal();
// If we don't have a nominal type, there are no conformances.