Macro context 

macro_rules! context {
    ($($key:ident => $value:expr),* $(,)?) => { ... };
}

Build a HashMap<String, Value> context from key => value pairs.

The map can be passed directly to Engine::render. For nested objects, wrap an inner context! call in Value::from.

use gracile_core::{Engine, Value, context};

let ctx = context! {
    name => "Alice",
    score => 42,
    active => true,
};
let out = Engine::new().render("{= name}: {= score}", ctx).unwrap();
assert_eq!(out, "Alice: 42");

Nested example:

use gracile_core::{Value, context};

let ctx = context! {
    user => Value::from(context! { name => "Alice", age => 30 }),
};