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macro_rules! bitflags_serde {
( $name:ident { $($variant:ident, )* }) => {
impl ::serde::Serialize for $name::Flags {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: ::serde::Serializer,
{
use ::serde::ser::SerializeSeq;
// Serialize the bitflags as a sequence of strings.
let mut state = serializer.serialize_seq(None)?;
$( if self.contains($name::$variant) {
state.serialize_element(stringify!($variant))?;
} )*
state.end()
}
}
impl ::serde::Deserialize for $name::Flags {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: ::serde::Deserializer,
{
struct Visitor;
impl ::serde::de::Visitor for Visitor {
type Value = $name::Flags;
fn expecting(&self,
formatter: &mut ::std::fmt::Formatter)
-> ::std::fmt::Result
{
formatter.write_str("a sequence of valid variants of $name")
}
fn visit_seq<V>(self, mut visitor: V) ->
Result<$name::Flags, V::Error>
where V: ::serde::de::SeqVisitor,
{
use ::serde::de::Error;
let mut flag = $name::Flags::empty();
while let Some(variant) = visitor.visit()? {
let variant: String = variant;
flag |= match &*variant {
$(
stringify!($variant) => $name::$variant,
)*
x => return Err(V::Error::invalid_value(
::serde::de::Unexpected::Str(x), &self)
),
};
}
Ok(flag)
}
}
// Deserialize the enum from a string.
deserializer.deserialize_seq(Visitor)
}
}
}
}
macro_rules! enum_serde {
( $name:ident { $($variant:ident, )* }) => {
impl ::serde::Serialize for $name {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: ::serde::Serializer,
{
// Serialize the enum as a string.
serializer.serialize_str(match *self {
$( $name::$variant => stringify!($variant), )*
})
}
}
impl ::serde::Deserialize for $name {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: ::serde::Deserializer,
{
struct Visitor;
impl ::serde::de::Visitor for Visitor {
type Value = $name;
fn expecting(&self,
formatter: &mut ::std::fmt::Formatter)
-> ::std::fmt::Result
{
formatter.write_str("a valid variant for $name")
}
fn visit_str<E>(self, value: &str) -> Result<$name, E>
where E: ::serde::de::Error,
{
match value {
$( stringify!($variant) => Ok($name::$variant), )*
x => Err(E::invalid_value(
::serde::de::Unexpected::Str(x),
&self)),
}
}
}
// Deserialize the enum from a string.
deserializer.deserialize_str(Visitor)
}
}
}
}