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Implement Tuple Hashable Conformance

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This commit is contained in:
Azoy
2020-07-19 22:07:26 -04:00
parent 58e643e1b0
commit 4ff28f2b40
8 changed files with 375 additions and 9 deletions
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13
stdlib/public/runtime/ProtocolConformance.cpp
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@@ -378,16 +378,18 @@ searchInConformanceCache(const Metadata *type,
extern const ProtocolDescriptor EQUATABLE_DESCRIPTOR;
extern const ProtocolDescriptor COMPARABLE_DESCRIPTOR;
extern const ProtocolDescriptor HASHABLE_DESCRIPTOR;
static bool tupleConformsToProtocol(const Metadata *type,
const ProtocolDescriptor *protocol) {
auto tuple = cast<TupleTypeMetadata>(type);
// At the moment, tuples can only conform to Equatable and Comparable, so
// reject all other protocols.
// At the moment, tuples can only conform to Equatable, Comparable and
// Hashable, so reject all other protocols.
auto equatable = &EQUATABLE_DESCRIPTOR;
auto comparable = &COMPARABLE_DESCRIPTOR;
if (protocol != equatable && protocol != comparable)
auto hashable = &HASHABLE_DESCRIPTOR;
if (protocol != equatable && protocol != comparable && protocol != hashable)
return false;
for (size_t i = 0; i != tuple->NumElements; i += 1) {
@@ -401,6 +403,7 @@ static bool tupleConformsToProtocol(const Metadata *type,
extern const ProtocolConformanceDescriptor _swift_tupleEquatable_conf;
extern const ProtocolConformanceDescriptor _swift_tupleComparable_conf;
extern const ProtocolConformanceDescriptor _swift_tupleHashable_conf;
static const ProtocolConformanceDescriptor *getTupleConformanceDescriptor(
const ProtocolDescriptor *protocol) {
@@ -412,6 +415,10 @@ static const ProtocolConformanceDescriptor *getTupleConformanceDescriptor(
return &_swift_tupleComparable_conf;
}
if (protocol == &HASHABLE_DESCRIPTOR) {
return &_swift_tupleHashable_conf;
}
return nullptr;
}