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This makes sure that Swift respects `-Xcc -stdlib=libc++` flags. Clang already has existing logic to discover the system-wide libc++ installation on Linux. We rely on that logic here. Importing a Swift module that was built with a different C++ stdlib is not supported and emits an error. The Cxx module can be imported when compiling with any C++ stdlib. The synthesized conformances, e.g. to CxxRandomAccessCollection also work. However, CxxStdlib currently cannot be imported when compiling with libc++, since on Linux it refers to symbols from libstdc++ which have different mangled names in libc++. rdar://118357548 / https://github.com/swiftlang/swift/issues/69825
54 lines
1.9 KiB
Swift
54 lines
1.9 KiB
Swift
// RUN: %target-run-simple-swift(-Xcc -stdlib=libc++ -I %S/Inputs -cxx-interoperability-mode=swift-5.9)
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// RUN: %target-run-simple-swift(-Xcc -stdlib=libc++ -I %S/Inputs -cxx-interoperability-mode=swift-6)
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// RUN: %target-run-simple-swift(-Xcc -stdlib=libc++ -I %S/Inputs -cxx-interoperability-mode=upcoming-swift)
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// RUN: %target-run-simple-swift(-Xcc -stdlib=libc++ -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -Xcc -std=c++14)
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// RUN: %target-run-simple-swift(-Xcc -stdlib=libc++ -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -Xcc -std=c++17)
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// RUN: %target-run-simple-swift(-Xcc -stdlib=libc++ -I %S/Inputs -cxx-interoperability-mode=upcoming-swift -Xcc -std=c++20)
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// REQUIRES: OS=linux-gnu
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// REQUIRES: system_wide_libcxx
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// This test ensures that the C++ stdlib functionality can be used when
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// compiling with libc++ on Linux. Since the CxxStdlib overlay currently isn't
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// available when compiling with a non-default C++ stdlib, this only tests the
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// features that don't require CxxStdlib overlay.
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// This test should be removed once CxxStdlib overlay supports libc++ on Linux.
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// Instead, we should run the existing use-std-*.swift tests with libc++ in
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// addition to the default config.
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import StdlibUnittest
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import CxxStdlib
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import StdVector
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var LibcxxLinuxTestSuite = TestSuite("libc++-Linux")
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LibcxxLinuxTestSuite.test("std::string") {
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var s = std.string()
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s.push_back(65)
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s.push_back(66)
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s.push_back(67)
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expectEqual(3, s.size())
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var sum = 0
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for c in s { // relies on the conformance to CxxRandomAccessCollection
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sum += Int(c)
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}
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expectEqual(198, sum)
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}
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LibcxxLinuxTestSuite.test("std::vector<std::string>") {
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var v = VectorOfString()
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v.push_back(std.string())
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v.push_back(std.string())
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expectEqual(2, v.size())
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var count = 0
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for s in v { // relies on the conformance to CxxRandomAccessCollection
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count += 1
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}
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expectEqual(2, count)
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}
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runAllTests()
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