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[TypeChecker] Add subscript support keypath dynamic member lookup

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This commit is contained in:
Pavel Yaskevich
2019-03-25 17:18:35 -07:00
parent 4d225c785c
commit d4bbcc1953
7 changed files with 329 additions and 91 deletions
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43
test/Constraints/keypath_dynamic_member_lookup.swift
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@@ -94,3 +94,46 @@ func baz(_ c: C<Point3D>) {
// CHECK-NEXT: apply [[KEYPATH]]<Point3D, Int>({{.*}}, [[Y]], {{.*}})
let _ = c.z
}
@dynamicMemberLookup
struct SubscriptLens<T> {
var value: T
subscript(foo: String) -> Int {
get { return 42 }
}
subscript<U>(dynamicMember member: KeyPath<T, U>) -> U {
get { return value[keyPath: member] }
}
subscript<U>(dynamicMember member: WritableKeyPath<T, U>) -> U {
get { return value[keyPath: member] }
set { value[keyPath: member] = newValue }
}
}
func keypath_with_subscripts(_ arr: SubscriptLens<[Int]>,
_ dict: inout SubscriptLens<[String: Int]>) {
// CHECK: keypath $WritableKeyPath<Array<Int>, ArraySlice<Int>>, (root $Array<Int>; settable_property $ArraySlice<Int>, id @$sSays10ArraySliceVyxGSnySiGcig : {{.*}})
_ = arr[0..<3]
// CHECK: keypath $KeyPath<Array<Int>, Int>, (root $Array<Int>; gettable_property $Int, id @$sSa5countSivg : {{.*}})
for idx in 0..<arr.count {
// CHECK: keypath $WritableKeyPath<Array<Int>, Int>, (root $Array<Int>; settable_property $Int, id @$sSayxSicig : {{.*}})
let _ = arr[idx]
// CHECK: keypath $WritableKeyPath<Array<Int>, Int>, (root $Array<Int>; settable_property $Int, id @$sSayxSicig : {{.*}})
print(arr[idx])
}
// CHECK: function_ref @$s29keypath_dynamic_member_lookup13SubscriptLensVySiSScig
_ = arr["hello"]
// CHECK: function_ref @$s29keypath_dynamic_member_lookup13SubscriptLensVySiSScig
_ = dict["hello"]
if let index = dict.value.firstIndex(where: { $0.value == 42 }) {
// CHECK: keypath $KeyPath<Dictionary<String, Int>, (key: String, value: Int)>, (root $Dictionary<String, Int>; gettable_property $(key: String, value: Int), id @$sSDyx3key_q_5valuetSD5IndexVyxq__Gcig : {{.*}})
let _ = dict[index]
}
// CHECK: keypath $WritableKeyPath<Dictionary<String, Int>, Optional<Int>>, (root $Dictionary<String, Int>; settable_property $Optional<Int>, id @$sSDyq_Sgxcig : {{.*}})
dict["ultimate question"] = 42
}