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[Property Wrappers] Use the outermost wrapper attribute type as the contextual type for property wrapper initialization #31002

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Merged
merged 1 commit into from
Apr 14, 2020
Merged

[Property Wrappers] Use the outermost wrapper attribute type as the contextual type for property wrapper initialization #31002

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1 change: 1 addition & 0 deletions lib/Sema/ConstraintSystem.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -4219,6 +4219,7 @@ void SolutionApplicationTarget::maybeApplyPropertyWrapper() {
// the initializer type later.
expression.wrappedVar = singleVar;
expression.expression = backingInitializer;
expression.convertType = outermostWrapperAttr->getTypeLoc();
}

SolutionApplicationTarget SolutionApplicationTarget::forInitialization(
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15 changes: 15 additions & 0 deletions test/Constraints/requirement_failures_in_contextual_type.swift
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Expand Up @@ -19,3 +19,18 @@ let _: A<Int>.C = 0
// expected-error@-1 {{'A<Int>.C' (aka 'Int') requires the types 'Int' and 'Int32' be equivalent}}
let _: A<Int>.B.E = 0
// expected-error@-1 {{'A<Int>.B' requires the types 'Int' and 'Int32' be equivalent}}


protocol P {}

@propertyWrapper
struct Wrapper<T: P> { // expected-note {{where 'T' = 'Int'}}
var wrappedValue: T
}

class C {
static let i = 1

@Wrapper // expected-error{{generic struct 'Wrapper' requires that 'Int' conform to 'P'}}
var value = C.i
}