Macro extendr_api::call[−][src]

macro_rules! call {
    ($($toks: tt)*) => { ... };
}

The call! macro calls an R function with Rust parameters. Equivalent to lang!(sym, params).eval() This returns a Rust Result.

Example:

use extendr_api::prelude::*;
test! {
    let vec = call!("c", 1.0, 2.0, 3.0).unwrap();
    assert_eq!(vec, r!([1., 2., 3.]));
    assert_eq!(vec.is_owned(), true);

    let list = call!("list", a=1, b=2).unwrap();
    assert_eq!(list.len(), 2);

    let three = call!("+", 1, 2).unwrap();
    assert_eq!(three, r!(3));
}