xsd_types/lexical/
g_month.rs

1use static_regular_grammar::RegularGrammar;
2
3use crate::lexical::parse_timezone;
4
5use super::{Lexical, LexicalFormOf};
6
7/// GMonth.
8///
9/// ```abnf
10/// g-month = "--" month [timezone]
11///
12/// month = "0" NZDIGIT
13///       / "1" ( "0" / "1" / "2" )
14///
15/// minute = ("0" / "1" / "2" / "3" / "4" / "5") DIGIT
16///
17/// timezone = ("+" / "-") ((("0" DIGIT / "1" ("0" / "1" / "2" / "3")) ":" minute) / "14:00")
18///          / %s"Z"
19///
20/// NZDIGIT = "1" / "2" / "3" / "4" / "5" / "6" / "7" / "8" / "9"
21/// ```
22#[derive(RegularGrammar, PartialEq, Eq, PartialOrd, Ord, Hash)]
23#[grammar(sized(GMonthBuf, derive(PartialEq, Eq, PartialOrd, Ord, Hash)))]
24pub struct GMonth(str);
25
26impl GMonth {
27	pub fn parts(&self) -> Parts {
28		Parts {
29			month: &self.0[2..4],
30			timezone: if self.0.len() > 4 {
31				Some(&self.0[4..])
32			} else {
33				None
34			},
35		}
36	}
37}
38
39impl Lexical for GMonth {
40	type Error = InvalidGMonth<String>;
41
42	fn parse(value: &str) -> Result<&Self, Self::Error> {
43		Self::new(value).map_err(|_| InvalidGMonth(value.to_owned()))
44	}
45}
46
47impl LexicalFormOf<crate::GMonth> for GMonth {
48	type ValueError = std::convert::Infallible;
49
50	fn try_as_value(&self) -> Result<crate::GMonth, Self::ValueError> {
51		Ok(self.parts().to_g_month())
52	}
53}
54
55#[derive(Debug, PartialEq, Eq)]
56pub struct Parts<'a> {
57	pub month: &'a str,
58	pub timezone: Option<&'a str>,
59}
60
61impl<'a> Parts<'a> {
62	pub fn new(month: &'a str, timezone: Option<&'a str>) -> Self {
63		Self { month, timezone }
64	}
65
66	fn to_g_month(&self) -> crate::GMonth {
67		crate::GMonth::new(
68			self.month.parse().unwrap(),
69			self.timezone.map(parse_timezone),
70		)
71		.unwrap()
72	}
73}
74
75#[cfg(test)]
76mod tests {
77	use super::*;
78
79	#[test]
80	fn parsing() {
81		let vectors = [
82			("--01", Parts::new("01", None)),
83			("--02Z", Parts::new("02", Some("Z"))),
84			("--03+05:00", Parts::new("03", Some("+05:00"))),
85		];
86
87		for (input, parts) in vectors {
88			let lexical_repr = GMonth::new(input).unwrap();
89			assert_eq!(lexical_repr.parts(), parts);
90
91			let value = lexical_repr.try_as_value().unwrap();
92			assert_eq!(value.to_string().as_str(), input)
93		}
94	}
95}
xsd_types/lexical/g_month.rs

xsd_types/lexical/
g_month.rs
