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Simplify the variant deserializer visitor

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This commit is contained in:
Erick Tryzelaar
2015-03-18 07:35:05 -07:00
parent 78137ee3a4
commit eb4af09456
7 changed files with 131 additions and 236 deletions
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tests/test_de.rs
+4 -53
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@@ -282,65 +282,16 @@ struct TokenDeserializerVariantVisitor<'a, 'b: 'a> {
impl<'a, 'b> de::VariantVisitor for TokenDeserializerVariantVisitor<'a, 'b> {
type Error = Error;
fn visit_kind<V>(&mut self) -> Result<V, Error>
fn visit_variant<V>(&mut self) -> Result<V, Error>
where V: de::Deserialize,
{
de::Deserialize::deserialize(self.de)
}
fn visit_unit(&mut self) -> Result<(), Error> {
let value = try!(Deserialize::deserialize(self.de));
match self.de.tokens.next() {
Some(Token::EnumEnd) => Ok(value),
Some(_) => Err(Error::SyntaxError),
None => Err(Error::EndOfStreamError),
}
}
fn visit_seq<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
where V: de::EnumSeqVisitor,
fn visit_value<V>(&mut self, visitor: V) -> Result<V::Value, Error>
where V: de::Visitor,
{
let token = self.de.tokens.next();
match token {
Some(Token::SeqStart(len)) => {
let value = try!(visitor.visit(TokenDeserializerSeqVisitor {
de: self.de,
len: len,
first: true,
}));
match self.de.tokens.next() {
Some(Token::EnumEnd) => Ok(value),
Some(_) => Err(Error::SyntaxError),
None => Err(Error::EndOfStreamError),
}
}
Some(_) => Err(Error::SyntaxError),
None => Err(Error::EndOfStreamError),
}
}
fn visit_map<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
where V: de::EnumMapVisitor,
{
match self.de.tokens.next() {
Some(Token::MapStart(len)) => {
let value = try!(visitor.visit(TokenDeserializerMapVisitor {
de: self.de,
len: len,
first: true,
}));
match self.de.tokens.next() {
Some(Token::EnumEnd) => Ok(value),
Some(_) => Err(Error::SyntaxError),
None => Err(Error::EndOfStreamError),
}
}
Some(_) => Err(Error::SyntaxError),
None => Err(Error::EndOfStreamError),
}
de::Deserializer::visit(self.de, visitor)
}
}