valence_command/parsers/
numbers.rs

Help
1use super::Parser;
2use crate::parsers::{CommandArg, CommandArgParseError, ParseInput};
3macro_rules! impl_parser_for_number {
4    ($type:ty, $name:expr, $parser:ident) => {
5        impl CommandArg for $type {
6            fn parse_arg(input: &mut ParseInput) -> Result<Self, CommandArgParseError> {
7                input.skip_whitespace();
8                let s = input.pop_word();
9
10                let parsed = s.parse::<$type>();
11
12                parsed.map_err(|_| CommandArgParseError::InvalidArgument {
13                    expected: $name.to_owned(),
14                    got: s.to_owned(),
15                })
16            }
17
18            fn display() -> Parser {
19                Parser::$parser {
20                    min: None,
21                    max: None,
22                }
23            }
24        }
25    };
26}
27
28impl_parser_for_number!(f32, "float", Float);
29impl_parser_for_number!(f64, "double", Double);
30impl_parser_for_number!(i32, "integer", Integer);
31impl_parser_for_number!(i64, "long", Long);
32impl_parser_for_number!(u32, "unsigned integer", Integer);
33
34#[cfg(test)]
35mod tests {
36    use super::*;
37
38    #[test]
39    fn test_number() {
40        let mut input = ParseInput::new("1");
41        assert_eq!(1, i32::parse_arg(&mut input).unwrap());
42        assert!(input.is_done());
43
44        let mut input = ParseInput::new("1");
45        assert_eq!(1, i64::parse_arg(&mut input).unwrap());
46        assert!(input.is_done());
47
48        let mut input = ParseInput::new("1.0");
49        assert_eq!(1.0, f32::parse_arg(&mut input).unwrap());
50        assert!(input.is_done());
51
52        let mut input = ParseInput::new("1.0");
53        assert_eq!(1.0, f64::parse_arg(&mut input).unwrap());
54        assert!(input.is_done());
55
56        let mut input = ParseInput::new("3.40282347e+38 ");
57        assert_eq!(f32::MAX, f32::parse_arg(&mut input).unwrap());
58        assert!(!input.is_done());
59    }
60}
valence_command/parsers/numbers.rs

valence_command/parsers/
numbers.rs
