Macro expression

macro_rules! expression {
    ($($expr:tt)+) => { ... };
}

Construct an hcl::Expression from an HCL attribute value expression literal.

For supported syntax see the body! macro documentation.

Example

use hcl::{Expression, Identifier, Object, ObjectKey};

let other = "hello";

let expression = hcl::expression!({
    foo       = true
    "baz qux" = [1, 2]
    (other)   = "world"
});

let expected = Expression::Object(Object::from([
    (ObjectKey::from(Identifier::new("foo")?), true.into()),
    (ObjectKey::from("baz qux"), vec![1u64, 2].into()),
    (ObjectKey::from("hello"), "world".into()),
]));

assert_eq!(expression, expected);