Trait deser::Descriptor

source · [−]
pub trait Descriptor {
    fn name(&self) -> Option<&str> { ... }

    fn precision(&self) -> Option<usize> { ... }

    fn unordered(&self) -> bool { ... }
}
Expand description

A descriptor provides auxiliary type information.

Many types upon serialization coerce their value into a common atomic value which is native to the deser data model. This causes challenges when a serializer needs to tell the difference between the original values. For instance a serializer might be interested in being able to tell a u8 from a u64 despite the fact that both are represented equally.

During serialization descriptors are generally created, for the deserialization system descriptors are only used when entering into a nested structure such as a map, struct or sequence.

Provided methods

Returns a descriptive name for a type if such a name is available.

Returns the precision in bits of the value.

This is normally set for numbers and returns the natural bit count of the source information. For instancen a u32 will return Some(32) from this method.

Returns information about this value’s ordering characteristic.

Things that are naturally unordered return true here. For instance a HashSet returns true here.

Implementors