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Add deserializer type hinting hooks

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Formats like xml have trouble knowing if they should deserialize
tags into a sequence from the stream they are deserializing from.
This PR adds hooks so the deserializee can inform the deserializer
to provide them a sequence if possible.

Closes #38.
This commit is contained in:
Erick Tryzelaar
2015-03-20 08:32:33 -07:00
parent 5378d22708
commit d17846eff1
4 changed files with 200 additions and 138 deletions
Download Patch File Download Diff File Expand all files Collapse all files
serde_macros/src/de.rs
+3 -40
View File
@@ -205,18 +205,6 @@ fn deserialize_unit_struct(
Ok($type_ident)
}
#[inline]
fn visit_named_unit<
E: ::serde::de::Error,
>(&mut self, name: &str) -> Result<$type_ident, E> {
if name == $type_name {
self.visit_unit()
} else {
Err(::serde::de::Error::syntax_error())
}
}
#[inline]
fn visit_seq<V>(&mut self, mut visitor: V) -> Result<$type_ident, V::Error>
where V: ::serde::de::SeqVisitor,
@@ -226,7 +214,7 @@ fn deserialize_unit_struct(
}
}
deserializer.visit(__Visitor)
deserializer.visit_named_unit($type_name, __Visitor)
})
}
@@ -265,21 +253,9 @@ fn deserialize_tuple_struct(
{
$visit_seq_expr
}
fn visit_named_seq<__V>(&mut self,
name: &str,
visitor: __V) -> Result<$ty, __V::Error>
where __V: ::serde::de::SeqVisitor,
{
if name == $type_name {
self.visit_seq(visitor)
} else {
Err(::serde::de::Error::syntax_error())
}
}
}
deserializer.visit($visitor_expr)
deserializer.visit_named_seq($type_name, $visitor_expr)
})
}
@@ -355,22 +331,9 @@ fn deserialize_struct(
{
$visit_map_expr
}
#[inline]
fn visit_named_map<__V>(&mut self,
name: &str,
visitor: __V) -> Result<$ty, __V::Error>
where __V: ::serde::de::MapVisitor,
{
if name == $type_name {
self.visit_map(visitor)
} else {
Err(::serde::de::Error::syntax_error())
}
}
}
deserializer.visit($visitor_expr)
deserializer.visit_named_map($type_name, $visitor_expr)
})
}