mlua-json 1.0.1

A Rust-native implementation of LuaRocks openresty/lua-cjson or grafi/lunajson for mlua.
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

mod decode;
mod encode;

pub use decode::decode;
pub use encode::encode;
use mlua::{Error, Lua, Table, Value};

pub fn preload(lua: &Lua) -> Result<(), Error> {
    // Configure module table
    let table = lua.create_table()?;

    // Configure module metatable
    table.raw_set(
        "decode",
        lua.create_function(|lua, arg: Option<String>| decode(lua, arg))?,
    )?;
    table.raw_set("encode", lua.create_function(|lua, arg: Value| encode(lua, &arg))?)?;

    // Preload module
    let globals = lua.globals();
    let package: Table = globals.get("package")?;
    let loaded: Table = package.get("loaded")?;
    loaded.set("json", table)?;
    Ok(())
}

#[cfg(test)]
mod tests {
    use mlua::{Lua, Table};
    use std::error::Error;

    #[test]
    fn load() -> Result<(), Box<dyn Error>> {
        let lua = Lua::new();
        super::preload(&lua)?;
        let module: Table = lua.load("return require('json')").eval()?;
        assert!(module.contains_key("decode")?);
        assert!(module.contains_key("encode")?);
        Ok(())
    }
}