The docs imply that the only consideration for using the
serde_if_integer128 macro is support for older versions of Rust, but
Serde's build configuration for 128-bit integers is also gated on the
target platform. For example, if Serde is being compiled for an
emscripten target, then it will not provide 128-bit integer APIs.
See also: https://github.com/BurntSushi/rust-csv/issues/158
This adds two new types to the `de::value` module,
`BorrowedStrDeserializer` and `BorrowedBytesDeserializer`. A
`BorrowedStrDeserializer` is just like `StrDeserializer`, except the
lifetime of the string is tied to the lifetime of the deserializer. This
can be useful when, for example, deserializing into a
`HashMap<&str, &str>` when the keys/values are tied to the deserializer
itself.
The `BorrowedBytesDeserializer` has no analog, but it's the same as
`BorrowedStrDeserialize` except for `&[u8]` instead of `&str`.
Andrew Gallant