clang-tidy: bugprone-dangling-handle works with foo{"a"} but not foo("a")

[sean-mcmanus]

Repro is using clang-tidy 17.0.1 on the code below with -std=c++17 and https://releases.llvm.org/17.0.1/tools/clang/tools/extra/docs/clang-tidy/checks/bugprone/dangling-handle.html . See #54984 for an example command line (this issue seems different from that bug).

#include <cstddef>
#include <string>
#include <string_view>

struct foo {
    std::string sss;
    explicit foo(std::string_view sss): sss{sss}{}
    operator std::string_view()
        const noexcept
    {
        return { sss.data(), sss.size() };
    }
};

int main()
{
    const std::string_view test1 = foo("a"); // no bugprone-dangling-handle
    const std::string_view test2 = foo{"a"}; // bugprone-dangling-handle
    return static_cast<int>(test1.length() + test2.length());
}

Bug: The foo{"a"} gets a bugprone-dangling-handle warning but the foo("a") line does not. I have other examples with class("str") not getting a warning, so it seems like the foo{"a"} is a special case in which it works, but usually it doesn't.