You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: implicit.rs
    path of file: ./repos/artichoke/artichoke-backend/src/convert
    
    the code of the file until where you have to start completion: use core::mem;

use artichoke_core::debug::Debug as _;
use artichoke_core::value::Value as _;
use spinoso_exception::TypeError;

use crate::convert::{BoxUnboxVmValue, UnboxedValueGuard};
use crate::error::Error;
use crate::types::Ruby;
use crate::value::Value;
use crate::Artichoke;

/// Attempt to implicitly convert a [`Value`] to an integer.
///
/// Attempt to extract an [`i64`] from the given `Value` by trying the following
/// conversions
    
/// # fn example() -> Result<(), Error> {
/// let mut interp = artichoke_backend::interpreter()?;
/// // successful conversions
/// let integer = interp.convert(17);
/// let a = interp.eval(b"class A; def to_int; 3; end; end; A.new")?;
///
/// assert!(matches!(
///     implicitly_convert_to_int(&mut interp, integer),
///     Ok(17)
/// ));
/// assert!(matches!(implicitly_convert_to_int(&mut interp, a), Ok(3)));
///
/// // failed conversions
/// let nil = Value::nil();
/// let b = interp.eval(b"class B; end; B.new")?;
/// let c = interp.eval(b"class C; def to_int; nil; end; end; C.new")?;
/// let d = interp.eval(b"class D; def to_int; 'not an integer'; end; end; D.new")?;
/// let e = interp.eval(b"class E; def to_int; 3.2; end; end; E.new")?;
/// let f = interp
///     .eval(b"class F; def to_int; raise ArgumentError, 'not an integer'; end; end; F.new")?;
///
/// assert!(implicitly_convert_to_int(&mut interp, nil).is_err());
/// assert!(implicitly_convert_to_int(&mut interp, b).is_err());
/// assert!(implicitly_convert_to_int(&mut interp, c).is_err());
/// assert!(implicitly_convert_to_int(&mut interp, d).is_err());
/// assert!(implicitly_convert_to_int(&mut interp, e).is_err());
/// assert!(implicitly_convert_to_int(&mut interp, f).is_err());
/// # Ok(())
/// # }