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6366878308
This adds a protocol to the C++ standard library overlay which will improve the ergonomics of `std::set`, `std::unordered_set` and `std::multiset` when used from Swift code. As of now, `CxxSet` adds a `contains` function to C++ sets. C++ stdlib set types are automatically conformed to `CxxSet`: `std::set`, `unordered_set`, `std::multiset`. Custom user types are not conformed to `CxxSet` automatically: while a custom type might have an interface similar to `std::set`, the semantics might differ, and adding a conformance would cause confusion.
51 lines
1.4 KiB
Swift
51 lines
1.4 KiB
Swift
// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop -Xfrontend -validate-tbd-against-ir=none)
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//
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// REQUIRES: executable_test
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//
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// Enable this everywhere once we have a solution for modularizing other C++ stdlibs: rdar://87654514
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// REQUIRES: OS=macosx || OS=linux-gnu
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import StdlibUnittest
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import StdSet
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import CxxStdlib
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import Cxx
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var StdSetTestSuite = TestSuite("StdSet")
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StdSetTestSuite.test("iterate over Swift.Array") {
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let s = Array(initSetOfCInt())
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var result = [CInt]()
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for x in s {
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result.append(x)
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}
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expectEqual(result[0], 1)
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expectEqual(result[1], 3)
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expectEqual(result[2], 5)
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}
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StdSetTestSuite.test("SetOfCInt.contains") {
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// This relies on the `std::set` conformance to `CxxSet` protocol.
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let s = initSetOfCInt()
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expectTrue(s.contains(1))
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expectFalse(s.contains(2))
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expectTrue(s.contains(3))
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}
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StdSetTestSuite.test("UnorderedSetOfCInt.contains") {
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// This relies on the `std::unordered_set` conformance to `CxxSet` protocol.
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let s = initUnorderedSetOfCInt()
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expectFalse(s.contains(1))
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expectTrue(s.contains(2))
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expectFalse(s.contains(3))
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}
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StdSetTestSuite.test("MultisetOfCInt.contains") {
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// This relies on the `std::multiset` conformance to `CxxSet` protocol.
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let s = initMultisetOfCInt()
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expectFalse(s.contains(1))
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expectTrue(s.contains(2))
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expectFalse(s.contains(3))
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}
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runAllTests()
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