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Add transform_error

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Sy Brand
2023-02-15 16:32:19 +00:00
committed by GitHub
parent 1369d77100
commit 5f9170aad5
1 changed files with 42 additions and 0 deletions
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42
include/tl/expected.hpp
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@ -1463,6 +1463,48 @@ public:
return map_error_impl(std::move(*this), std::forward<F>(f));
}
#endif
#if defined(TL_EXPECTED_CXX14) && !defined(TL_EXPECTED_GCC49) && \
!defined(TL_EXPECTED_GCC54) && !defined(TL_EXPECTED_GCC55)
template <class F> TL_EXPECTED_11_CONSTEXPR auto transform_error(F &&f) & {
return map_error_impl(*this, std::forward<F>(f));
}
template <class F> TL_EXPECTED_11_CONSTEXPR auto transform_error(F &&f) && {
return map_error_impl(std::move(*this), std::forward<F>(f));
}
template <class F> constexpr auto transform_error(F &&f) const & {
return map_error_impl(*this, std::forward<F>(f));
}
template <class F> constexpr auto transform_error(F &&f) const && {
return map_error_impl(std::move(*this), std::forward<F>(f));
}
#else
template <class F>
TL_EXPECTED_11_CONSTEXPR decltype(map_error_impl(std::declval<expected &>(),
std::declval<F &&>()))
transform_error(F &&f) & {
return map_error_impl(*this, std::forward<F>(f));
}
template <class F>
TL_EXPECTED_11_CONSTEXPR decltype(map_error_impl(std::declval<expected &&>(),
std::declval<F &&>()))
transform_error(F &&f) && {
return map_error_impl(std::move(*this), std::forward<F>(f));
}
template <class F>
constexpr decltype(map_error_impl(std::declval<const expected &>(),
std::declval<F &&>()))
transform_error(F &&f) const & {
return map_error_impl(*this, std::forward<F>(f));
}
#ifndef TL_EXPECTED_NO_CONSTRR
template <class F>
constexpr decltype(map_error_impl(std::declval<const expected &&>(),
std::declval<F &&>()))
transform_error(F &&f) const && {
return map_error_impl(std::move(*this), std::forward<F>(f));
}
#endif
#endif
template <class F> expected TL_EXPECTED_11_CONSTEXPR or_else(F &&f) & {
return or_else_impl(*this, std::forward<F>(f));