Function serde_aux::field_attributes::deserialize_ref_cell_option_number_from_string

pub fn deserialize_ref_cell_option_number_from_string<'de, T, D>(
    deserializer: D
) -> Result<RefCell<Option<T>>, D::Error> where
    D: Deserializer<'de>,
    T: FromStr + Deserialize<'de>,
    <T as FromStr>::Err: Display, 

Deserializes a RefCell option number from string or a number. Same logic as "deserialize_option_number_from_string".

Example:

use serde_aux::prelude::*;
use std::cell::RefCell;

#[derive(Debug, serde::Deserialize)]
struct MyStruct {
    #[serde(default, deserialize_with = "deserialize_ref_cell_option_number_from_string")]
    v: RefCell<Option<f32>>
}

let a = serde_qs::from_str::<MyStruct>("v=-0.1").unwrap();
assert_eq!(a.v, RefCell::new(Some(-0.1)));