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static constexpr bool | is_null (std::monostate const &) noexcept |
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static constexpr std::monostate | null () noexcept |
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static bool | is_null (std::monostate const &value) |
| Is value a null?
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static std::monostate | null () |
| Return a null value.
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static constexpr bool | has_null = true |
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static constexpr bool | always_null = true |
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static bool | has_null |
| Does this type have a null value?
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static bool | always_null |
| Is this type always null?
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◆ null()
static std::monostate pqxx::nullness< std::monostate, void >::null |
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staticnodiscard |
Return a null value.
Don't use this in generic code to compare a value and see whether it is null. Some types may have multiple null values which do not compare as equal, or may define a null value which is not equal to anything including itself, like in SQL.
The documentation for this struct was generated from the following file:
- /builddir/build/BUILD/libpqxx-7.10.1-build/libpqxx-7.10.1/redhat-linux-build/include/pqxx/internal/conversions.hxx