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Commit | Line | Data |
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f20569fa XL |
1 | use crate::date::{self, Date}; |
2 | use crate::error::{Error, Result}; | |
3 | use crate::iter::Iter; | |
4 | use crate::release::{self, Release}; | |
5 | use crate::time; | |
6 | use crate::version::{Channel::*, Version}; | |
7 | use proc_macro::{Group, TokenTree}; | |
8 | use std::cmp::Ordering; | |
9 | ||
10 | pub enum Bound { | |
11 | Nightly(Date), | |
12 | Stable(Release), | |
13 | } | |
14 | ||
15 | pub fn parse(paren: Group, iter: Iter) -> Result<Bound> { | |
16 | if let Some(TokenTree::Literal(literal)) = iter.peek() { | |
17 | let repr = literal.to_string(); | |
18 | if repr.starts_with(|ch: char| ch.is_ascii_digit()) { | |
19 | if repr.contains('.') { | |
20 | return release::parse(paren, iter).map(Bound::Stable); | |
21 | } else { | |
22 | return date::parse(paren, iter).map(Bound::Nightly); | |
23 | } | |
24 | } | |
25 | } | |
26 | let msg = format!( | |
27 | "expected rustc release number like 1.31, or nightly date like {}", | |
28 | time::today(), | |
29 | ); | |
30 | Err(Error::group(paren, msg)) | |
31 | } | |
32 | ||
33 | impl PartialEq<Bound> for Version { | |
34 | fn eq(&self, rhs: &Bound) -> bool { | |
35 | match rhs { | |
36 | Bound::Nightly(date) => match self.channel { | |
37 | Stable | Beta | Dev => false, | |
38 | Nightly(nightly) => nightly == *date, | |
39 | }, | |
40 | Bound::Stable(release) => { | |
41 | self.minor == release.minor | |
42 | && release.patch.map_or(true, |patch| self.patch == patch) | |
43 | } | |
44 | } | |
45 | } | |
46 | } | |
47 | ||
48 | impl PartialOrd<Bound> for Version { | |
49 | fn partial_cmp(&self, rhs: &Bound) -> Option<Ordering> { | |
50 | match rhs { | |
51 | Bound::Nightly(date) => match self.channel { | |
52 | Stable | Beta => Some(Ordering::Less), | |
53 | Nightly(nightly) => Some(nightly.cmp(date)), | |
54 | Dev => Some(Ordering::Greater), | |
55 | }, | |
56 | Bound::Stable(release) => { | |
57 | let version = (self.minor, self.patch); | |
58 | let bound = (release.minor, release.patch.unwrap_or(0)); | |
59 | Some(version.cmp(&bound)) | |
60 | } | |
61 | } | |
62 | } | |
63 | } |