# pwasm-std
Parity WASM contracts standard library for Rust
[](https://travis-ci.org/paritytech/pwasm-std)
[Documentation](https://paritytech.github.io/pwasm-std/pwasm_std/)
It is a limited subset of the Rust standard library, along with a custom allocator which delegates the allocation to the runtime-defined externs.
## Use
Just add a dependency
```toml
[dependencies]
pwasm-std = "0.3"
```
The crate is supposed to be used on nightly Rust only, until the custom allocator api stablizes in Rust.
## no_std
`pwasm-std` is itself compiled with no_std and expected to be used within no_std-crates/binaries, since it defines `lang_item`-s on it's own, which will conflict with standard library.
But for test scenarios it can be compiled with feature "std" and auxiliary crate "pwasm-test" to support testing of contracts' internal logic.
# License
`pwasm-std` is primarily distributed under the terms of both the MIT
license and the Apache License (Version 2.0), at your choice.
See LICENSE-APACHE, and LICENSE-MIT for details.