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#[macro_export]
macro_rules! define_attribute_enums {
($attr:ident, $decoder:ident, $encoder:ident,[$($variant:ident),*]) => {
#[allow(missing_docs)]
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum $attr {
$($variant($variant)),*
}
$(impl From<$variant> for $attr {
fn from(f: $variant) -> Self {
$attr::$variant(f)
}
})*
$(impl $crate::convert::TryAsRef<$variant> for $attr {
fn try_as_ref(&self) -> Option<&$variant> {
if let $attr::$variant(a) = self {
Some(a)
} else {
None
}
}
})*
impl $crate::Attribute for $attr {
type Decoder = $decoder;
type Encoder = $encoder;
fn get_type(&self) -> $crate::AttributeType {
match self {
$($attr::$variant(a) => a.get_type()),*
}
}
fn before_encode<A>(&mut self, message: &$crate::Message<A>) -> ::bytecodec::Result<()>
where
A: $crate::Attribute,
{
match self {
$($attr::$variant(a) => track!(a.before_encode(message), "attr={}", stringify!($variant))),*
}
}
fn after_decode<A>(&mut self, message: &$crate::Message<A>) -> ::bytecodec::Result<()>
where
A: $crate::Attribute,
{
match self {
$($attr::$variant(a) => track!(a.after_decode(message), "attr={}", stringify!($variant))),*
}
}
}
#[allow(missing_docs)]
#[derive(Debug)]
pub enum $decoder {
$($variant(<$variant as $crate::Attribute>::Decoder)),*,
None,
}
impl $decoder {
pub fn new() -> Self {
Self::default()
}
}
impl Default for $decoder {
fn default() -> Self {
$decoder::None
}
}
impl ::bytecodec::Decode for $decoder {
type Item = $attr;
fn decode(&mut self, buf: &[u8], eos: ::bytecodec::Eos) -> ::bytecodec::Result<usize> {
match self {
$($decoder::$variant(a) => track!(a.decode(buf, eos), "attr={}", stringify!($variant))),*,
$decoder::None => track_panic!(::bytecodec::ErrorKind::InconsistentState),
}
}
fn finish_decoding(&mut self) -> ::bytecodec::Result<Self::Item> {
let item = match self {
$($decoder::$variant(a) => track!(a.finish_decoding(), "attr={}", stringify!($variant))?.into()),*,
$decoder::None => track_panic!(::bytecodec::ErrorKind::IncompleteDecoding),
};
*self = $decoder::None;
Ok(item)
}
fn requiring_bytes(&self) -> ::bytecodec::ByteCount {
match self {
$($decoder::$variant(a) => a.requiring_bytes()),*,
$decoder::None => ::bytecodec::ByteCount::Finite(0),
}
}
fn is_idle(&self) -> bool {
match self {
$($decoder::$variant(a) => a.is_idle()),*,
$decoder::None => true,
}
}
}
impl ::bytecodec::TryTaggedDecode for $decoder {
type Tag = $crate::AttributeType;
fn try_start_decoding(&mut self, tag: Self::Tag) -> ::bytecodec::Result<bool> {
*self = match tag.as_u16() {
$($variant::CODEPOINT => $decoder::$variant(<$variant as $crate::Attribute>::Decoder::default())),*,
_ => return Ok(false),
};
Ok(true)
}
}
#[allow(missing_docs)]
#[derive(Debug)]
pub enum $encoder {
$($variant(<$variant as $crate::Attribute>::Encoder)),*,
None,
}
impl $encoder {
pub fn new() -> Self {
Self::default()
}
}
impl Default for $encoder {
fn default() -> Self {
$encoder::None
}
}
impl ::bytecodec::Encode for $encoder {
type Item = $attr;
fn encode(&mut self, buf: &mut [u8], eos: ::bytecodec::Eos) -> ::bytecodec::Result<usize> {
match self {
$($encoder::$variant(a) => track!(a.encode(buf, eos), "attr={}", stringify!($variant))),*,
$encoder::None => Ok(0),
}
}
fn start_encoding(&mut self, item: Self::Item) -> ::bytecodec::Result<()> {
track_assert!(self.is_idle(), ::bytecodec::ErrorKind::EncoderFull; item);
*self = match item {
$($attr::$variant(a) => {
let mut encoder = <$variant as $crate::Attribute>::Encoder::default();
track!(encoder.start_encoding(a), "attr={}", stringify!($variant))?;
$encoder::$variant(encoder)
}),*
};
Ok(())
}
fn requiring_bytes(&self) -> ::bytecodec::ByteCount {
use ::bytecodec::SizedEncode;
::bytecodec::ByteCount::Finite(self.exact_requiring_bytes())
}
fn is_idle(&self) -> bool {
match self {
$($encoder::$variant(a) => a.is_idle()),*,
$encoder::None => true,
}
}
}
impl ::bytecodec::SizedEncode for $encoder {
fn exact_requiring_bytes(&self) -> u64 {
match self {
$($encoder::$variant(a) => a.exact_requiring_bytes()),*,
$encoder::None => 0,
}
}
}
};
}