use serde::de::{self, IntoDeserializer};
use std::fmt;
use std::marker::PhantomData;
pub fn valid_enum_variant(s: &str) -> bool {
if s.is_empty() {
return false;
}
s.as_bytes().iter().all(|b| match b {
b'A'..=b'Z' | b'0'..=b'9' | b'_' => true,
_ => false,
})
}
pub enum UnionField_<T> {
Type,
Value(T),
}
impl<'de, T> de::Deserialize<'de> for UnionField_<T>
where
T: de::Deserialize<'de>,
{
fn deserialize<D>(d: D) -> Result<UnionField_<T>, D::Error>
where
D: de::Deserializer<'de>,
{
d.deserialize_str(UnionFieldVisitor(PhantomData))
}
}
struct UnionFieldVisitor<T>(PhantomData<T>);
impl<'de, T> de::Visitor<'de> for UnionFieldVisitor<T>
where
T: de::Deserialize<'de>,
{
type Value = UnionField_<T>;
fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.write_str("string")
}
fn visit_str<E>(self, value: &str) -> Result<UnionField_<T>, E>
where
E: de::Error,
{
match value {
"type" => Ok(UnionField_::Type),
value => T::deserialize(value.into_deserializer()).map(UnionField_::Value),
}
}
}
pub struct UnionTypeField_;
impl<'de> de::Deserialize<'de> for UnionTypeField_ {
fn deserialize<D>(d: D) -> Result<UnionTypeField_, D::Error>
where
D: de::Deserializer<'de>,
{
d.deserialize_str(UnionTypeFieldVisitor)
}
}
struct UnionTypeFieldVisitor;
impl<'de> de::Visitor<'de> for UnionTypeFieldVisitor {
type Value = UnionTypeField_;
fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.write_str("type field")
}
fn visit_str<E>(self, value: &str) -> Result<UnionTypeField_, E>
where
E: de::Error,
{
match value {
"type" => Ok(UnionTypeField_),
value => Err(E::invalid_value(de::Unexpected::Str(value), &self)),
}
}
}