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Property wrapper backing initializers are not dynamically replaceable #28590

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Merged
merged 1 commit into from
Dec 5, 2019
Merged

Property wrapper backing initializers are not dynamically replaceable #28590

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3 changes: 2 additions & 1 deletion lib/SIL/SILDeclRef.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1065,7 +1065,8 @@ bool SILDeclRef::canBeDynamicReplacement() const {
bool SILDeclRef::isDynamicallyReplaceable() const {
if (kind == SILDeclRef::Kind::DefaultArgGenerator)
return false;
if (isStoredPropertyInitializer())
if (isStoredPropertyInitializer() ||
kind == SILDeclRef::Kind::PropertyWrapperBackingInitializer)
return false;

// Class allocators are not dynamic replaceable.
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14 changes: 14 additions & 0 deletions test/SILGen/dynamically_replaceable.swift
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Expand Up @@ -404,3 +404,17 @@ public func testWithLocalFun() {
let unamedClosure = { print("foo") }
unamedClosure()
}

@propertyWrapper
struct WrapperWithInitialValue<T> {
var wrappedValue: T

init(wrappedValue initialValue: T) {
self.wrappedValue = initialValue
}
}

// CHECK-LABEL: sil hidden [ossa] @$s23dynamically_replaceable10SomeStructV1tSbvpfP
public struct SomeStruct {
@WrapperWithInitialValue var t = false
}