How to convert toml-rs result to std :: collections :: HashMap

Question

I am new to Rust and am trying to create something simple. I want to load data from a file .tomland use rustache to output text from it.

Rustache, apparently uses the HashMap as a data source, and I'm sure looking at toml-rs documents, which must be able to transform its types Tableand Arrayin HashMapand Vecs, and I suspect that it has something to do with Decoder, but i can't figure it out.

If someone can give a short example of how to do this, I would be very grateful.

Answer 1

, toml::decode():

let value: toml::Value = toml::Value::Table(Parser::new(input).parse().unwrap());
let data: HashMap<String, Vec<u32>> = toml::decode(value).unwrap();

x = [1, 2, 3]
y = [4, 5, 6]

, , rustache , . "" toml::Value rustache::HashBuilder. Decodable ( , , , ) - :

fn toml_into_hashbuilder<'a>(value: toml::Table, mut hb: rustache::HashBuilder<'a>) -> rustache::HashBuilder<'a> {
    for (k, v) in value {
        match v {
            toml::Value::String(s) => hb.insert_string(k, s),
            toml::Value::Integer(i) => hb.insert_int(k, i),
            toml::Value::Float(f) => hb.insert_float(k, f),
            toml::Value::Boolean(b) => hb.insert_bool(k, b),
            toml::Value::Datetime(s) => hb.insert_string(k, s),
            toml::Value::Array(arr) => hb.insert_vector(k, |vb| toml_into_vecbuilder(arr.clone(), vb)),
            toml::Value::Table(tbl) => hb.insert_hash(k, |hb| toml_into_hashbuilder(tbl.clone(), hb))
        }
    }
    hb
}

fn toml_into_vecbuilder<'a>(value: toml::Array, mut vb: rustache::VecBuilder<'a>) -> rustache::VecBuilder<'a> {
    for v in value {
        match v {
            toml::Value::String(s) => vb.push_string(s),
            toml::Value::Integer(i) => vb.push_int(i),
            toml::Value::Float(f) => vb.push_float(f),
            toml::Value::Boolean(b) => vb.push_bool(b),
            toml::Value::Datetime(s) => vb.push_string(s),
            toml::Value::Array(arr) => vb.push_vector(|vb| toml_into_vecbuilder(arr.clone(), vb)),
            toml::Value::Table(tbl) => vb.push_hash(|hb| toml_into_hashbuilder(tbl.clone(), hb))
        }
    }
    vb
}

let value: toml::Table = Parser::new(input).parse().unwrap();
let hb = toml_into_hashbuilder(value, rustache::HashBuilder::new());
let result = rustache::render_text(your_template, hb);

- rustache. , clone() , move.