estring/std/
number.rs

1use crate::core::{EString, ParseFragment, ToEString};
2use crate::error::{Error, Reason};
3
4#[doc(hidden)]
5macro_rules! from_env_string_numbers_impl {
6    ($($ty:ty),+$(,)?) => {
7        $(
8            impl ParseFragment for $ty {
9                #[inline]
10                fn parse_frag(s: EString) -> crate::Result<Self> {
11                    s.0.parse::<Self>().map_err(|_| Error(s, Reason::Parse))
12                }
13            }
14
15            impl ToEString for $ty {
16                #[inline]
17                fn to_estring(&self) -> EString {
18                    EString(self.to_string())
19                }
20            }
21
22            #[cfg(feature = "aggs")]
23            impl crate::core::Aggregatable for $ty {
24                type Item = Self;
25
26                #[inline]
27                fn items(self) -> Vec<Self::Item> {
28                    vec![self]
29                }
30            }
31        )+
32    };
33}
34
35#[rustfmt::skip]
36from_env_string_numbers_impl![
37    i8, i16, i32, i64, i128, isize,
38    u8, u16, u32, u64, u128, usize,
39    f32, f64
40];
41
42#[cfg(test)]
43mod tests {
44    use super::*;
45
46    #[test]
47    fn should_parse_number() {
48        let estr = EString::from("-10");
49        match estr.parse::<i32>() {
50            Ok(res) => assert_eq!(res, -10),
51            _ => unreachable!(),
52        };
53    }
54
55    #[test]
56    fn should_parse_float_number() {
57        let estr = EString::from("-0.15");
58        match estr.parse::<f32>() {
59            #[allow(clippy::float_cmp)]
60            Ok(res) => assert_eq!(res, -0.15),
61            _ => unreachable!(),
62        };
63    }
64
65    #[test]
66    fn should_throw_parse_error() {
67        let estr = EString::from("-10");
68        match estr.parse::<u32>() {
69            Err(Error(orig, reason)) => {
70                assert_eq!(orig, EString::from("-10"));
71                assert_eq!(reason, Reason::Parse);
72            }
73            _ => unreachable!(),
74        };
75    }
76
77    #[test]
78    fn should_format_number() {
79        assert_eq!((-1).to_estring(), EString(String::from("-1")));
80        assert_eq!(10.to_estring(), EString(String::from("10")));
81        assert_eq!(1.1.to_estring(), EString(String::from("1.1")));
82    }
83}
estring/std/number.rs

estring/std/
number.rs
