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use odbc_sys::{Date, Time, Timestamp};
use super::{AnySlice, AnySliceMut, BufferDesc, BufferKind, NullableSlice, NullableSliceMut};
use crate::Bit;
pub trait Item: Sized + Copy {
#[deprecated = "Use associated method buffer_desc instead."]
const BUFFER_KIND: BufferKind;
fn buffer_desc(nullable: bool) -> BufferDesc;
fn as_slice(variant: AnySlice<'_>) -> Option<&[Self]>;
fn as_nullable_slice(variant: AnySlice<'_>) -> Option<NullableSlice<Self>>;
fn as_slice_mut(variant: AnySliceMut<'_>) -> Option<&'_ mut [Self]>;
fn as_nullable_slice_mut(variant: AnySliceMut<'_>) -> Option<NullableSliceMut<'_, Self>>;
}
macro_rules! impl_item {
($t:ident, $plain:ident, $null:ident) => {
impl Item for $t {
const BUFFER_KIND: BufferKind = BufferKind::$plain;
fn buffer_desc(nullable: bool) -> BufferDesc {
BufferDesc::$plain { nullable }
}
fn as_slice(variant: AnySlice<'_>) -> Option<&[Self]> {
match variant {
AnySlice::$plain(vals) => Some(vals),
_ => None,
}
}
fn as_nullable_slice(variant: AnySlice<'_>) -> Option<NullableSlice<Self>> {
match variant {
AnySlice::$null(vals) => Some(vals),
_ => None,
}
}
fn as_slice_mut<'a>(variant: AnySliceMut<'a>) -> Option<&'a mut [Self]> {
match variant {
AnySliceMut::$plain(vals) => Some(vals),
_ => None,
}
}
fn as_nullable_slice_mut<'a>(
variant: AnySliceMut<'a>,
) -> Option<NullableSliceMut<'a, Self>> {
match variant {
AnySliceMut::$null(vals) => Some(vals),
_ => None,
}
}
}
};
}
impl_item!(f64, F64, NullableF64);
impl_item!(f32, F32, NullableF32);
impl_item!(u8, U8, NullableU8);
impl_item!(i8, I8, NullableI8);
impl_item!(i16, I16, NullableI16);
impl_item!(i32, I32, NullableI32);
impl_item!(i64, I64, NullableI64);
impl_item!(Date, Date, NullableDate);
impl_item!(Bit, Bit, NullableBit);
impl_item!(Time, Time, NullableTime);
impl_item!(Timestamp, Timestamp, NullableTimestamp);