Struct extendr_api::wrapper::Func

pub struct Func<F, B, E> {
    pub formals: F,
    pub body: B,
    pub env: E,
}

Wrapper for creating functions (CLOSSXP).

use extendr_api::prelude::*;
test! {
    let expr = R!(function(a = 1, b) {c <- a + b}).unwrap();
    let func = expr.as_func().unwrap();

    let expected_formals = Pairlist {
        names_and_values: vec![("a", r!(1.0)), ("b", missing_arg())] };
    let expected_body = lang!(
        "{", lang!("<-", sym!(c), lang!("+", sym!(a), sym!(b))));
    assert_eq!(func.formals.as_pairlist().unwrap(), expected_formals);
    assert_eq!(func.body, expected_body);
    assert_eq!(func.env, global_env());
}

Fields

formals: F

body: B

env: E

Trait Implementations

impl<F: Clone, B: Clone, E: Clone> Clone for Func<F, B, E>

fn clone(&self) -> Func<F, B, E>

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<F: Debug, B: Debug, E: Debug> Debug for Func<F, B, E>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<F: PartialEq, B: PartialEq, E: PartialEq> PartialEq<Func<F, B, E>> for Func<F, B, E>

fn eq(&self, other: &Func<F, B, E>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Func<F, B, E>) -> bool

This method tests for !=.

impl<F, B, E> StructuralPartialEq for Func<F, B, E>