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Change de::VariantVisitor to let deserializers know the variant kind

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This allows formats like cbor that encode a unit variant as just a
string to work.

[breaking-change]
This commit is contained in:
Erick Tryzelaar
2015-04-06 20:04:01 -07:00
parent d36879f5ee
commit 1da47c0870
7 changed files with 94 additions and 24 deletions
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src/json/value.rs
+23 -2
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@@ -737,7 +737,18 @@ impl<'a> de::VariantVisitor for SeqDeserializer<'a> {
de::Deserialize::deserialize(self.de)
}
fn visit_value<V>(&mut self, visitor: V) -> Result<V::Value, Error>
fn visit_unit(&mut self) -> Result<(), Error>
{
de::Deserialize::deserialize(self)
}
fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
where V: de::Visitor,
{
de::Deserializer::visit(self, visitor)
}
fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Error>
where V: de::Visitor,
{
de::Deserializer::visit(self, visitor)
@@ -836,7 +847,17 @@ impl<'a> de::VariantVisitor for MapDeserializer<'a> {
de::Deserialize::deserialize(self.de)
}
fn visit_value<V>(&mut self, visitor: V) -> Result<V::Value, Error>
fn visit_unit(&mut self) -> Result<(), Error> {
de::Deserialize::deserialize(self)
}
fn visit_seq<V>(&mut self, visitor: V) -> Result<V::Value, Error>
where V: de::Visitor,
{
de::Deserializer::visit(self, visitor)
}
fn visit_map<V>(&mut self, visitor: V) -> Result<V::Value, Error>
where V: de::Visitor,
{
de::Deserializer::visit(self, visitor)