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a12986ade4
This adds a protocol to the C++ standard library overlay which will improve the ergonomics of `std::optional` when used from Swift code. As of now, the overlay adds an initializer of `Swift.Optional` that takes an instance of `CxxOptional` as a parameter.
39 lines
1.0 KiB
Swift
39 lines
1.0 KiB
Swift
// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop -Xcc -std=c++17 -Xfrontend -validate-tbd-against-ir=none)
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//
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// REQUIRES: executable_test
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// REQUIRES: OS=macosx
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import StdlibUnittest
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import StdOptional
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import CxxStdlib
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var StdOptionalTestSuite = TestSuite("StdOptional")
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StdOptionalTestSuite.test("pointee") {
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let nonNilOpt = getNonNilOptional()
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let pointee = nonNilOpt.pointee
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expectEqual(123, pointee)
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}
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StdOptionalTestSuite.test("std::optional => Swift.Optional") {
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let nonNilOpt = getNonNilOptional()
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let swiftOptional = Optional(fromCxx: nonNilOpt)
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expectNotNil(swiftOptional)
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expectEqual(123, swiftOptional!)
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let nilOpt = getNilOptional()
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let swiftNil = Optional(fromCxx: nilOpt)
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expectNil(swiftNil)
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}
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StdOptionalTestSuite.test("std::optional hasValue/value") {
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let nonNilOpt = getNonNilOptional()
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expectTrue(nonNilOpt.hasValue)
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expectEqual(123, nonNilOpt.value)
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let nilOpt = getNilOptional()
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expectFalse(nilOpt.hasValue)
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}
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runAllTests()
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