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Use serde to deserialize options

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est31 2019-09-02 00:32:26 +02:00
parent e8bbd330e0
commit a69a0bc5ee
1 changed files with 20 additions and 1 deletions
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21
src/parser/deserializer.rs
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@ -59,6 +59,12 @@ impl<'de> ConfigDeserializer<'de> {
Ok(()) Ok(())
} }
pub fn top(&mut self) -> &DeserializerItem {
let value = self.stack.last();
trace!("inspecting top value :: {:?}", value);
value.expect("Can't get top elemant of an empty stack")
}
pub fn pop(&mut self) -> DeserializerItem { pub fn pop(&mut self) -> DeserializerItem {
let value = self.stack.pop(); let value = self.stack.pop();
trace!("popping value :: {:?}", value); trace!("popping value :: {:?}", value);
@ -81,7 +87,7 @@ impl<'de, 'a> de::Deserializer<'de> for &'a mut ConfigDeserializer<'de> {
V::Value::extract(&value.val) V::Value::extract(&value.val)
} }
forward_to_deserialize_any! { bool option } forward_to_deserialize_any! { bool }
fn deserialize_i8<V>(self, _visitor: V) -> Result<V::Value, Self::Error> fn deserialize_i8<V>(self, _visitor: V) -> Result<V::Value, Self::Error>
where where
@ -174,6 +180,19 @@ impl<'de, 'a> de::Deserializer<'de> for &'a mut ConfigDeserializer<'de> {
unimplemented!("deserialize_byte_buf") unimplemented!("deserialize_byte_buf")
} }
fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: Visitor<'de>,
{
let value = self.top();
let name = std::any::type_name::<V::Value>();
trace!("<Option> Extracting {:?} for Option<{}>", value, name);
match value.val.item() {
Value::Primitive(Primitive::Nothing) => visitor.visit_none(),
_ => visitor.visit_some(self),
}
}
fn deserialize_unit<V>(self, _visitor: V) -> Result<V::Value, Self::Error> fn deserialize_unit<V>(self, _visitor: V) -> Result<V::Value, Self::Error>
where where
V: Visitor<'de>, V: Visitor<'de>,