/rust/registry/src/index.crates.io-6f17d22bba15001f/time-0.3.41/src/weekday.rs

Source (jump to first uncovered line)
//! Days of the week.

use core::fmt;
use core::str::FromStr;

use powerfmt::smart_display::{FormatterOptions, Metadata, SmartDisplay};

use self::Weekday::*;
use crate::error;

/// Days of the week.
///
/// As order is dependent on context (Sunday could be either two days after or five days before
/// Friday), this type does not implement `PartialOrd` or `Ord`.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum Weekday {
    #[allow(missing_docs)]
    Monday,
    #[allow(missing_docs)]
    Tuesday,
    #[allow(missing_docs)]
    Wednesday,
    #[allow(missing_docs)]
    Thursday,
    #[allow(missing_docs)]
    Friday,
    #[allow(missing_docs)]
    Saturday,
    #[allow(missing_docs)]
    Sunday,
}

impl Weekday {
    /// Get the previous weekday.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Tuesday.previous(), Weekday::Monday);
    /// ```
    pub const fn previous(self) -> Self {
        match self {
            Monday => Sunday,
            Tuesday => Monday,
            Wednesday => Tuesday,
            Thursday => Wednesday,
            Friday => Thursday,
            Saturday => Friday,
            Sunday => Saturday,
        }
    }

    /// Get the next weekday.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Monday.next(), Weekday::Tuesday);
    /// ```
    pub const fn next(self) -> Self {
        match self {
            Monday => Tuesday,
            Tuesday => Wednesday,
            Wednesday => Thursday,
            Thursday => Friday,
            Friday => Saturday,
            Saturday => Sunday,
            Sunday => Monday,
        }
    }

    /// Get n-th next day.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Monday.nth_next(1), Weekday::Tuesday);
    /// assert_eq!(Weekday::Sunday.nth_next(10), Weekday::Wednesday);
    /// ```
    pub const fn nth_next(self, n: u8) -> Self {
        match (self.number_days_from_monday() + n % 7) % 7 {
            0 => Monday,
            1 => Tuesday,
            2 => Wednesday,
            3 => Thursday,
            4 => Friday,
            5 => Saturday,
            val => {
                debug_assert!(val == 6);
                Sunday
            }
        }
    }

    /// Get n-th previous day.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Monday.nth_prev(1), Weekday::Sunday);
    /// assert_eq!(Weekday::Sunday.nth_prev(10), Weekday::Thursday);
    /// ```
    pub const fn nth_prev(self, n: u8) -> Self {
        match self.number_days_from_monday() as i8 - (n % 7) as i8 {
            1 | -6 => Tuesday,
            2 | -5 => Wednesday,
            3 | -4 => Thursday,
            4 | -3 => Friday,
            5 | -2 => Saturday,
            6 | -1 => Sunday,
            val => {
                debug_assert!(val == 0);
                Monday
            }
        }
    }

    /// Get the one-indexed number of days from Monday.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Monday.number_from_monday(), 1);
    /// ```
    #[doc(alias = "iso_weekday_number")]
    pub const fn number_from_monday(self) -> u8 {
        self.number_days_from_monday() + 1
    }

    /// Get the one-indexed number of days from Sunday.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Monday.number_from_sunday(), 2);
    /// ```
    pub const fn number_from_sunday(self) -> u8 {
        self.number_days_from_sunday() + 1
    }

    /// Get the zero-indexed number of days from Monday.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Monday.number_days_from_monday(), 0);
    /// ```
    pub const fn number_days_from_monday(self) -> u8 {
        self as u8
    }

    /// Get the zero-indexed number of days from Sunday.
    ///
    /// ```rust
    /// # use time::Weekday;
    /// assert_eq!(Weekday::Monday.number_days_from_sunday(), 1);
    /// ```
    pub const fn number_days_from_sunday(self) -> u8 {
        match self {
            Monday => 1,
            Tuesday => 2,
            Wednesday => 3,
            Thursday => 4,
            Friday => 5,
            Saturday => 6,
            Sunday => 0,
        }
    }
}

mod private {
    #[non_exhaustive]
    #[derive(Debug, Clone, Copy)]
    pub struct WeekdayMetadata;
}
use private::WeekdayMetadata;

impl SmartDisplay for Weekday {
    type Metadata = WeekdayMetadata;

    fn metadata(&self, _: FormatterOptions) -> Metadata<'_, Self> {
        match self {
            Monday => Metadata::new(6, self, WeekdayMetadata),
            Tuesday => Metadata::new(7, self, WeekdayMetadata),
            Wednesday => Metadata::new(9, self, WeekdayMetadata),
            Thursday => Metadata::new(8, self, WeekdayMetadata),
            Friday => Metadata::new(6, self, WeekdayMetadata),
            Saturday => Metadata::new(8, self, WeekdayMetadata),
            Sunday => Metadata::new(6, self, WeekdayMetadata),
        }
    }

    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.pad(match self {
            Monday => "Monday",
            Tuesday => "Tuesday",
            Wednesday => "Wednesday",
            Thursday => "Thursday",
            Friday => "Friday",
            Saturday => "Saturday",
            Sunday => "Sunday",
        })
    }
}

impl fmt::Display for Weekday {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        SmartDisplay::fmt(self, f)
    }
}

impl FromStr for Weekday {
    type Err = error::InvalidVariant;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "Monday" => Ok(Monday),
            "Tuesday" => Ok(Tuesday),
            "Wednesday" => Ok(Wednesday),
            "Thursday" => Ok(Thursday),
            "Friday" => Ok(Friday),
            "Saturday" => Ok(Saturday),
            "Sunday" => Ok(Sunday),
            _ => Err(error::InvalidVariant),
        }
    }
}

Coverage Report

Created: 2025-07-18 06:52

Line	Count	Source (jump to first uncovered line)
1		//! Days of the week.
2
3		use core::fmt;
4		use core::str::FromStr;
5
6		use powerfmt::smart_display::{FormatterOptions, Metadata, SmartDisplay};
7
8		use self::Weekday::*;
9		use crate::error;
10
11		/// Days of the week.
12		///
13		/// As order is dependent on context (Sunday could be either two days after or five days before
14		/// Friday), this type does not implement `PartialOrd` or `Ord`.
15		#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
16		pub enum Weekday {
17		#[allow(missing_docs)]
18		Monday,
19		#[allow(missing_docs)]
20		Tuesday,
21		#[allow(missing_docs)]
22		Wednesday,
23		#[allow(missing_docs)]
24		Thursday,
25		#[allow(missing_docs)]
26		Friday,
27		#[allow(missing_docs)]
28		Saturday,
29		#[allow(missing_docs)]
30		Sunday,
31		}
32
33		impl Weekday {
34		/// Get the previous weekday.
35		///
36		/// ```rust
37		/// # use time::Weekday;
38		/// assert_eq!(Weekday::Tuesday.previous(), Weekday::Monday);
39		/// ```
40	0	pub const fn previous(self) -> Self {
41	0	match self {
42	0	Monday => Sunday,
43	0	Tuesday => Monday,
44	0	Wednesday => Tuesday,
45	0	Thursday => Wednesday,
46	0	Friday => Thursday,
47	0	Saturday => Friday,
48	0	Sunday => Saturday,
49		}
50	0	}
51
52		/// Get the next weekday.
53		///
54		/// ```rust
55		/// # use time::Weekday;
56		/// assert_eq!(Weekday::Monday.next(), Weekday::Tuesday);
57		/// ```
58	0	pub const fn next(self) -> Self {
59	0	match self {
60	0	Monday => Tuesday,
61	0	Tuesday => Wednesday,
62	0	Wednesday => Thursday,
63	0	Thursday => Friday,
64	0	Friday => Saturday,
65	0	Saturday => Sunday,
66	0	Sunday => Monday,
67		}
68	0	}
69
70		/// Get n-th next day.
71		///
72		/// ```rust
73		/// # use time::Weekday;
74		/// assert_eq!(Weekday::Monday.nth_next(1), Weekday::Tuesday);
75		/// assert_eq!(Weekday::Sunday.nth_next(10), Weekday::Wednesday);
76		/// ```
77	0	pub const fn nth_next(self, n: u8) -> Self {
78	0	match (self.number_days_from_monday() + n % 7) % 7 {
79	0	0 => Monday,
80	0	1 => Tuesday,
81	0	2 => Wednesday,
82	0	3 => Thursday,
83	0	4 => Friday,
84	0	5 => Saturday,
85	0	val => {
86	0	debug_assert!(val == 6);
87	0	Sunday
88		}
89		}
90	0	}
91
92		/// Get n-th previous day.
93		///
94		/// ```rust
95		/// # use time::Weekday;
96		/// assert_eq!(Weekday::Monday.nth_prev(1), Weekday::Sunday);
97		/// assert_eq!(Weekday::Sunday.nth_prev(10), Weekday::Thursday);
98		/// ```
99	0	pub const fn nth_prev(self, n: u8) -> Self {
100	0	match self.number_days_from_monday() as i8 - (n % 7) as i8 {
101	0	1 \| -6 => Tuesday,
102	0	2 \| -5 => Wednesday,
103	0	3 \| -4 => Thursday,
104	0	4 \| -3 => Friday,
105	0	5 \| -2 => Saturday,
106	0	6 \| -1 => Sunday,
107	0	val => {
108	0	debug_assert!(val == 0);
109	0	Monday
110		}
111		}
112	0	}
113
114		/// Get the one-indexed number of days from Monday.
115		///
116		/// ```rust
117		/// # use time::Weekday;
118		/// assert_eq!(Weekday::Monday.number_from_monday(), 1);
119		/// ```
120		#[doc(alias = "iso_weekday_number")]
121	0	pub const fn number_from_monday(self) -> u8 {
122	0	self.number_days_from_monday() + 1
123	0	}
124
125		/// Get the one-indexed number of days from Sunday.
126		///
127		/// ```rust
128		/// # use time::Weekday;
129		/// assert_eq!(Weekday::Monday.number_from_sunday(), 2);
130		/// ```
131	0	pub const fn number_from_sunday(self) -> u8 {
132	0	self.number_days_from_sunday() + 1
133	0	}
134
135		/// Get the zero-indexed number of days from Monday.
136		///
137		/// ```rust
138		/// # use time::Weekday;
139		/// assert_eq!(Weekday::Monday.number_days_from_monday(), 0);
140		/// ```
141	0	pub const fn number_days_from_monday(self) -> u8 {
142	0	self as u8
143	0	}
144
145		/// Get the zero-indexed number of days from Sunday.
146		///
147		/// ```rust
148		/// # use time::Weekday;
149		/// assert_eq!(Weekday::Monday.number_days_from_sunday(), 1);
150		/// ```
151	0	pub const fn number_days_from_sunday(self) -> u8 {
152	0	match self {
153	0	Monday => 1,
154	0	Tuesday => 2,
155	0	Wednesday => 3,
156	0	Thursday => 4,
157	0	Friday => 5,
158	0	Saturday => 6,
159	0	Sunday => 0,
160		}
161	0	}
162		}
163
164		mod private {
165		#[non_exhaustive]
166		#[derive(Debug, Clone, Copy)]
167		pub struct WeekdayMetadata;
168		}
169		use private::WeekdayMetadata;
170
171		impl SmartDisplay for Weekday {
172		type Metadata = WeekdayMetadata;
173
174	0	fn metadata(&self, _: FormatterOptions) -> Metadata<'_, Self> {
175	0	match self {
176	0	Monday => Metadata::new(6, self, WeekdayMetadata),
177	0	Tuesday => Metadata::new(7, self, WeekdayMetadata),
178	0	Wednesday => Metadata::new(9, self, WeekdayMetadata),
179	0	Thursday => Metadata::new(8, self, WeekdayMetadata),
180	0	Friday => Metadata::new(6, self, WeekdayMetadata),
181	0	Saturday => Metadata::new(8, self, WeekdayMetadata),
182	0	Sunday => Metadata::new(6, self, WeekdayMetadata),
183		}
184	0	}
185
186	0	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
187	0	f.pad(match self {
188	0	Monday => "Monday",
189	0	Tuesday => "Tuesday",
190	0	Wednesday => "Wednesday",
191	0	Thursday => "Thursday",
192	0	Friday => "Friday",
193	0	Saturday => "Saturday",
194	0	Sunday => "Sunday",
195		})
196	0	}
197		}
198
199		impl fmt::Display for Weekday {
200	0	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
201	0	SmartDisplay::fmt(self, f)
202	0	}
203		}
204
205		impl FromStr for Weekday {
206		type Err = error::InvalidVariant;
207
208	0	fn from_str(s: &str) -> Result<Self, Self::Err> {
209	0	match s {
210	0	"Monday" => Ok(Monday),
211	0	"Tuesday" => Ok(Tuesday),
212	0	"Wednesday" => Ok(Wednesday),
213	0	"Thursday" => Ok(Thursday),
214	0	"Friday" => Ok(Friday),
215	0	"Saturday" => Ok(Saturday),
216	0	"Sunday" => Ok(Sunday),
217	0	_ => Err(error::InvalidVariant),
218		}
219	0	}
220		}