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serde: Require T::serde_fields for all serde structs #23126

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Sep 6, 2024
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serde: Require T::serde_fields for all serde structs #23126

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178 changes: 0 additions & 178 deletions src/v/serde/envelope_for_each_field.h
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Original file line number Diff line number Diff line change
Expand Up @@ -17,189 +17,11 @@

namespace serde {

namespace detail {

template<typename T>
concept has_serde_fields = requires(T t) { t.serde_fields(); };

} // namespace detail

template<detail::has_serde_fields T>
constexpr inline auto envelope_to_tuple(T&& t) {
return t.serde_fields();
}

template<typename T>
requires(!detail::has_serde_fields<T>)
constexpr inline auto envelope_to_tuple(T& t) {
static_assert(std::is_aggregate_v<T>);
static_assert(std::is_standard_layout_v<T>);
static_assert(!std::is_polymorphic_v<T>);

constexpr auto const a = reflection::arity<T>() - 1;
if constexpr (a == 0) {
return std::tie();
} else if constexpr (a == 1) {
auto& [p1] = t;
return std::tie(p1);
} else if constexpr (a == 2) {
auto& [p1, p2] = t;
return std::tie(p1, p2);
} else if constexpr (a == 3) {
auto& [p1, p2, p3] = t;
return std::tie(p1, p2, p3);
} else if constexpr (a == 4) {
auto& [p1, p2, p3, p4] = t;
return std::tie(p1, p2, p3, p4);
} else if constexpr (a == 5) {
auto& [p1, p2, p3, p4, p5] = t;
return std::tie(p1, p2, p3, p4, p5);
} else if constexpr (a == 6) {
auto& [p1, p2, p3, p4, p5, p6] = t;
return std::tie(p1, p2, p3, p4, p5, p6);
} else if constexpr (a == 7) {
auto& [p1, p2, p3, p4, p5, p6, p7] = t;
return std::tie(p1, p2, p3, p4, p5, p6, p7);
} else if constexpr (a == 8) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8] = t;
return std::tie(p1, p2, p3, p4, p5, p6, p7, p8);
} else if constexpr (a == 9) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9] = t;
return std::tie(p1, p2, p3, p4, p5, p6, p7, p8, p9);
} else if constexpr (a == 10) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10] = t;
return std::tie(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10);
} else if constexpr (a == 11) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11] = t;
return std::tie(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11);
} else if constexpr (a == 12) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12] = t;
return std::tie(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12);
} else if constexpr (a == 13) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13] = t;
return std::tie(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13);
} else if constexpr (a == 14) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14] = t;
return std::tie(
p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14);
} else if constexpr (a == 15) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15]
= t;
return std::tie(
p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15);
} else if constexpr (a == 16) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16]
= t;
return std::tie(
p1,
p2,
p3,
p4,
p5,
p6,
p7,
p8,
p9,
p10,
p11,
p12,
p13,
p14,
p15,
p16);
} else if constexpr (a == 17) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17]
= t;
return std::tie(
p1,
p2,
p3,
p4,
p5,
p6,
p7,
p8,
p9,
p10,
p11,
p12,
p13,
p14,
p15,
p16,
p17);
} else if constexpr (a == 18) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18]
= t;
return std::tie(
p1,
p2,
p3,
p4,
p5,
p6,
p7,
p8,
p9,
p10,
p11,
p12,
p13,
p14,
p15,
p16,
p17,
p18);
} else if constexpr (a == 19) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19]
= t;
return std::tie(
p1,
p2,
p3,
p4,
p5,
p6,
p7,
p8,
p9,
p10,
p11,
p12,
p13,
p14,
p15,
p16,
p17,
p18,
p19);
} else if constexpr (a == 20) {
auto& [p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20]
= t;
return std::tie(
p1,
p2,
p3,
p4,
p5,
p6,
p7,
p8,
p9,
p10,
p11,
p12,
p13,
p14,
p15,
p16,
p17,
p18,
p19,
p20);
}
}

template<typename Fn>
concept check_for_more_fn = requires(Fn&& fn, int& f) {
{ fn(f) } -> std::convertible_to<bool>;
Expand Down