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21 lines
1.1 KiB
21 lines
1.1 KiB
2 years ago
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#include "macros.hh"
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namespace error {
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struct Error {
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DEFINE_INTERFACE(Error);
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constexpr Error() noexcept = default;
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constexpr operator std::string_view() const noexcept { return message(); }
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constexpr virtual std::string_view message() const noexcept =0;
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constexpr virtual Error const* inner() const noexcept { return nullptr; }
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// TODO: `borrow::Borrow<typename T, where::deref_to<T> (using std::pointer_traits<>) PtrType = T*>` (borrow.hh): essentially specialised `std::variant<T, PtrType>`
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constexpr virtual borrow::Borrow<const Report> report() const& { return borrow::Borrow{ nullptr }; }
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// constexpr virtual borrow::Borrow<const Report> report() & { return borrow::Borrow{ nullptr }; }
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constexpr virtual borrow::Borrow<Report> report() & { return borrow::Borrow{ nullptr }; }
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constexpr virtual borrow::Borrow<Report>:into_owned_t report() && { return borrow::Borrow{ nullptr }.into_owned(); } // <- Will initialise with `into_owned() &&` member function, which `std::move()`s the value from the pointer instead of just copying the pointer. XXX: How do we actually want this borrowing interface to behave, huh?
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};
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}
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