Lib.rs

Cargo Features

[dependencies]
postcard = { version = "1.0.10", default-features = false, features = ["embedded-io", "embedded-io-04", "use-std", "alloc", "embedded-io-06", "heapless-cas", "use-defmt", "use-crc", "experimental-derive"] }

default = heapless-cas

The heapless-cas feature is set by default whenever postcard is added without default-features = false somewhere in the dependency tree.

embedded-io

Enables support for embedded-io traits This feature will track the latest embedded-io when major releases are made

Enables embedded-io ^0.4

embedded-io-04

Specific versions of embedded-io can be selected through the features below

Enables embedded-io ^0.4

Affects flavors::io.eio, de::from_eio, flavors::eio, ser::to_eio, flavors::io…

use-std = alloc

Enables std of serde

serde:

Provide impls for common standard library types like Vec<T> and HashMap<K, V>.
Requires a dependency on the Rust standard library.

Affects flavors::io.io, de::from_io, flavors::io, ser::to_stdvec, ser::to_stdvec_cobs, ser::to_io, ser::to_stdvec_crc32, flavors::io…

alloc use-std?

Enables alloc of optional embedded-io ^0.4, optional embedded-io, and serde

serde:

Provide impls for types in the Rust core allocation and collections library including String, Box<T>, Vec<T>, and Cow<T>. This is a subset of std but may be enabled without depending on all of std.

Affects ser::to_allocvec, ser::to_allocvec_cobs, ser::to_allocvec_crc32…

embedded-io-06

Enables embedded-io

Affects flavors::io.eio, de::from_eio, flavors::eio, ser::to_eio, flavors::io…

heapless-cas default = heapless

Enables cas of heapless ^0.7.0

use-defmt = defmt

use-crc = crc, paste

Affects flavors::crc, de::from_bytes_crc32, de::take_from_bytes_crc32, flavors::crc, ser::to_slice_crc32, ser::to_vec_crc32, ser::to_stdvec_crc32, ser::to_allocvec_crc32…

experimental-derive = postcard-derive

Experimental features!

NOT subject to SemVer guarantees!

Affects postcard::experimental.max_size, postcard::experimental.schema…

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

crc use-crc?

defmt use-defmt?

heapless heapless-cas

Enables heapless ^0.7.0

Affects ser::to_vec_cobs, ser::to_vec, ser::to_vec_crc32…

paste use-crc?

postcard-derive experimental-derive?

Enables postcard-derive ^0.1.2