pub(super) mod opt;
use crate::err::Error;
use crate::value::serde::ser;
use crate::Cond;
use crate::Fields;
use crate::Groups;
use crate::Tables;
use crate::View;
use ser::Serializer as _;
use serde::ser::Error as _;
use serde::ser::Impossible;
use serde::ser::Serialize;
pub struct Serializer;
impl ser::Serializer for Serializer {
type Ok = View;
type Error = Error;
type SerializeSeq = Impossible<View, Error>;
type SerializeTuple = Impossible<View, Error>;
type SerializeTupleStruct = Impossible<View, Error>;
type SerializeTupleVariant = Impossible<View, Error>;
type SerializeMap = Impossible<View, Error>;
type SerializeStruct = SerializeView;
type SerializeStructVariant = Impossible<View, Error>;
const EXPECTED: &'static str = "a struct `View`";
#[inline]
fn serialize_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Error> {
Ok(SerializeView::default())
}
}
#[derive(Default)]
pub struct SerializeView {
expr: Fields,
what: Tables,
cond: Option<Cond>,
group: Option<Groups>,
}
impl serde::ser::SerializeStruct for SerializeView {
type Ok = View;
type Error = Error;
fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Error>
where
T: ?Sized + Serialize,
{
match key {
"expr" => {
self.expr = value.serialize(ser::fields::Serializer.wrap())?;
}
"what" => {
self.what = Tables(value.serialize(ser::table::vec::Serializer.wrap())?);
}
"cond" => {
self.cond = value.serialize(ser::cond::opt::Serializer.wrap())?;
}
"group" => {
self.group = value.serialize(ser::group::vec::opt::Serializer.wrap())?.map(Groups);
}
key => {
return Err(Error::custom(format!("unexpected field `View::{key}`")));
}
}
Ok(())
}
fn end(self) -> Result<Self::Ok, Error> {
Ok(View {
expr: self.expr,
what: self.what,
cond: self.cond,
group: self.group,
})
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn default() {
let stmt = View::default();
let value: View = stmt.serialize(Serializer.wrap()).unwrap();
assert_eq!(value, stmt);
}
}