[clang-tidy] Clang-Tidy produces a false positive when returning from a lambda `cppcoreguidelines-owning-memory`

[H-G-Hristov]

Clang-Tidy produces a false positive when returning from a lambda:

https://releases.llvm.org/15.0.0/tools/clang/tools/extra/docs/clang-tidy/checks/cppcoreguidelines/owning-memory.html#cppcoreguidelines-owning-memory

returning a newly created resource of type 'void' or 'gsl::owner<>' from a function whose return type is not 'gsl::owner<>'C/C++cppcoreguidelines-owning-memory

Is caused by:

TEST(ExternalLibTest, MicrosoftGslOwner)
{
    struct S
    {
        int value{1};
    };

    const auto MakeS = [] -> ::gsl::owner<S*>
    {
        return ::gsl::owner<S*>{new S{}};
    };

    const ::gsl::owner<S*> sPtr = MakeS();

    EXPECT_EQ(sPtr->value, 1);
    EXPECT_NE(sPtr->value, 2);
}

but this is fine:

namespace {

struct S
{
    int value{1};
};

auto MakeS()
{
    return ::gsl::owner<S*>{new S{}};
}

}  // namespace

[llvmbot]

@llvm/issue-subscribers-clang-tidy

[llvmbot]

@llvm/issue-subscribers-bug

[PiotrZSL]

https://reviews.llvm.org/D157285