1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
<div align="center">
<h1><code>wat</code></h1>
<strong>A <a href="https://bytecodealliance.org/">Bytecode Alliance</a> project</strong>
<p>
<strong>A Rust parser for the <a href="https://webassembly.github.io/spec/core/text/index.html">WebAssembly Text Format (WAT)</a>.</strong>
</p>
<p>
<a href="https://crates.io/crates/wat"><img src="https://img.shields.io/crates/v/wat.svg?style=flat-square" alt="Crates.io version" /></a>
<a href="https://crates.io/crates/wat"><img src="https://img.shields.io/crates/d/wat.svg?style=flat-square" alt="Download" /></a>
<a href="https://docs.rs/wat/"><img src="https://img.shields.io/static/v1?label=docs&message=wat&color=blue&style=flat-square" alt="docs.rs docs" /></a>
<a href="https://docs.rs/wast/"><img src="https://img.shields.io/static/v1?label=docs&message=wast&color=blue&style=flat-square" alt="docs.rs docs" /></a>
</p>
</div>
## Usage
Add `wat` to your `Cargo.toml`
```sh
$ cargo add wat
```
And then you can parse WAT to binary WebAssembly via:
```rust
// Parse from a file ...
let binary = wat::parse_file("./foo.wat")?;
// ... or a string
let wat = r#"
(module
(func $foo)
(func (export "bar")
call $foo
)
)
"#;
let binary = wat::parse_str(wat)?;
```
## AST Representation
The `wat` crate does not expose an AST as its goal is to provide a
forever-stable interface against the `wast` crate. Using `wat` is suitable when
all you want to do is translate from text-to-binary, for example parsing the
input of a CLI program into the WebAssembly binary format.
If instead you're interested in working with the AST of a text file or otherwise
adding your own parsing to the text format you'll want to take a look at the
[`wast` crate](../wast/README.md).
## Stability and WebAssembly Features
Consult the [crate documentation](https://docs.rs/wat) for more information,
but the general idea is this crate will not issue a semver-breaking change for
breaking changes in the WAT format, either for MVP features or post-MVP
features. No opt-in is required to use WebAssembly features, so using them may
break if the upstream spec changes.
# License
This project is licensed under the Apache 2.0 license with the LLVM exception.
See [LICENSE](LICENSE) for more details.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this project by you, as defined in the Apache-2.0 license,
shall be licensed as above, without any additional terms or conditions.
|
