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[cxx-interop] Add a test for interface generation of a module requiring C++20 #80679

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Merged
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Apr 11, 2025
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[cxx-interop] Add a test for interface generation of a module requiring C++20 #80679

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4 changes: 4 additions & 0 deletions test/SourceKit/InterfaceGen/Inputs/module.modulemap
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module UsesCXX20 {
header "uses-cxx20.h"
export *
}
3 changes: 3 additions & 0 deletions test/SourceKit/InterfaceGen/Inputs/uses-cxx20.h
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#include <span>

using MySpanOfInt = std::span<int>;
10 changes: 10 additions & 0 deletions test/SourceKit/InterfaceGen/gen_clang_cxx_module_with_cxx20.swift
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// First, check that we error out for older C++ standards.
// RUN: not %sourcekitd-test -req=interface-gen -module UsesCXX20 -- -cxx-interoperability-mode=default -Xfrontend -disable-implicit-concurrency-module-import -Xfrontend -disable-implicit-string-processing-module-import -I %S/Inputs -target %target-triple -sdk %sdk

// Now make sure we emit the correct interface for std::span if C++20 is enabled.
// RUN: %sourcekitd-test -req=interface-gen -module UsesCXX20 -- -cxx-interoperability-mode=default -Xfrontend -disable-implicit-concurrency-module-import -Xfrontend -disable-implicit-string-processing-module-import -I %S/Inputs -target %target-triple -sdk %sdk -Xcc -std=c++20 | %FileCheck %s

// FIXME: older libstdc++ version on Swift CI does not support C++20
// UNSUPPORTED: OS=linux-gnu

// CHECK: public typealias MySpanOfInt = std.span<