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use crate::{pg_sys, FromDatum, IntoDatum};
impl<A, B> IntoDatum for (Option<A>, Option<B>)
where
A: IntoDatum,
B: IntoDatum,
{
fn into_datum(self) -> Option<pg_sys::Datum> {
let vec = vec![self.0.into_datum(), self.1.into_datum()];
vec.into_datum()
}
fn type_oid() -> pg_sys::Oid {
0
}
}
impl<A, B, C> IntoDatum for (Option<A>, Option<B>, Option<C>)
where
A: IntoDatum,
B: IntoDatum,
C: IntoDatum,
{
fn into_datum(self) -> Option<pg_sys::Datum> {
let vec = vec![
self.0.into_datum(),
self.1.into_datum(),
self.2.into_datum(),
];
vec.into_datum()
}
fn type_oid() -> pg_sys::Oid {
0
}
}
impl<A, B> FromDatum for (Option<A>, Option<B>)
where
A: FromDatum + IntoDatum,
B: FromDatum + IntoDatum,
{
unsafe fn from_datum(datum: pg_sys::Datum, is_null: bool, typoid: pg_sys::Oid) -> Option<Self>
where
Self: Sized,
{
let mut vec = Vec::<Option<pg_sys::Datum>>::from_datum(datum, is_null, typoid).unwrap();
let b = vec.pop().unwrap();
let a = vec.pop().unwrap();
let a_datum = if a.is_some() {
A::from_datum(a.unwrap(), false, A::type_oid())
} else {
None
};
let b_datum = if b.is_some() {
B::from_datum(b.unwrap(), false, B::type_oid())
} else {
None
};
Some((a_datum, b_datum))
}
}
impl<A, B, C> FromDatum for (Option<A>, Option<B>, Option<C>)
where
A: FromDatum + IntoDatum,
B: FromDatum + IntoDatum,
C: FromDatum + IntoDatum,
{
unsafe fn from_datum(datum: pg_sys::Datum, is_null: bool, typoid: pg_sys::Oid) -> Option<Self>
where
Self: Sized,
{
let mut vec = Vec::<Option<pg_sys::Datum>>::from_datum(datum, is_null, typoid).unwrap();
let c = vec.pop().unwrap();
let b = vec.pop().unwrap();
let a = vec.pop().unwrap();
let a_datum = if a.is_some() {
A::from_datum(a.unwrap(), false, A::type_oid())
} else {
None
};
let b_datum = if b.is_some() {
B::from_datum(b.unwrap(), false, B::type_oid())
} else {
None
};
let c_datum = if c.is_some() {
C::from_datum(c.unwrap(), false, C::type_oid())
} else {
None
};
Some((a_datum, b_datum, c_datum))
}
}