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53b3a69a9a
If a protocol witness table requires instantiation, the runtime needs to call the witness table accessor when looking up the conformance in swift_conformsToProtocol(). We had a bit of code for this already, but it wasn't fully hooked up. Change IRGen to emit a reference to the witness table accessor rather than the witness table itself if the witness table needs instantiation, and add support to the runtime for calling the accessor.
57 lines
1.8 KiB
Swift
57 lines
1.8 KiB
Swift
// RUN: rm -rf %t && mkdir -p %t
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// RUN: %target-build-swift -emit-library -Xfrontend -enable-resilience -c %S/../Inputs/resilient_protocol.swift -o %t/resilient_protocol.o
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// RUN: %target-build-swift -emit-module -Xfrontend -enable-resilience -c %S/../Inputs/resilient_protocol.swift -o %t/resilient_protocol.o
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// RUN: %target-build-swift %s -Xlinker %t/resilient_protocol.o -I %t -L %t -o %t/main
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// RUN: %target-run %t/main
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// REQUIRES: executable_test
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//
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// Note: protocol resilience in the sense of resiliently adding new
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// requirements with default implementations is actually tested in
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// validation-test/Evolution/test_protocol_*.
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//
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import StdlibUnittest
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import resilient_protocol
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var ResilientProtocolTestSuite = TestSuite("ResilientProtocol")
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func increment(_ x: inout Int, by: Int) {
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x += by
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}
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struct OtherConformingType : OtherResilientProtocol { }
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// Ensure we can call materializeForSet defined in a protocol extension
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// from a different resilience domain.
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ResilientProtocolTestSuite.test("PropertyInProtocolExtension") {
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var o = OtherConformingType()
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increment(&o.propertyInExtension, by: 5)
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increment(&OtherConformingType.staticPropertyInExtension, by: 7)
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expectEqual(OtherConformingType.staticPropertyInExtension, 12)
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}
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struct DerivedConformingType : ResilientDerivedProtocol {
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func requirement() -> Int { return 42 }
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}
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// Ensure dynamic casts to resilient types work.
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func callBaseRequirement(t: ResilientBaseProtocol) -> Int {
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return t.requirement()
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}
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@_semantics("optimize.sil.never")
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func castToDerivedProtocol<T>(t: T) -> Int {
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return callBaseRequirement(t: t as! ResilientDerivedProtocol)
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}
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ResilientProtocolTestSuite.test("DynamicCastToResilientProtocol") {
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expectEqual(castToDerivedProtocol(t: DerivedConformingType()), 42)
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}
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runAllTests()
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