refactor: remove month_from_n function

src/timeago.rs

@@ -18,7 +18,7 @@
 use std::ops::Mul;
 
 use serde::{Deserialize, Serialize};
-use time::{Date, Duration, OffsetDateTime};
+use time::{Date, Duration, Month, OffsetDateTime};
 
 use crate::{
     param::Language,
@@ -261,7 +261,8 @@ pub fn parse_textual_date(lang: Language, textual_date: &str) -> Option<ParsedDa
                 }
 
                 match (y, m, d) {
-                    (Some(y), Some(m), Some(d)) => util::month_from_n(m as u8)
+                    (Some(y), Some(m), Some(d)) => Month::try_from(m as u8)
+                        .ok()
                         .and_then(|m| Date::from_calendar_date(y.into(), m, d as u8).ok())
                         .map(ParsedDate::Absolute),
                     _ => None,

src/util/date.rs

@@ -1,23 +1,5 @@
 use time::{Date, Month, OffsetDateTime};
 
-pub const fn month_from_n(n: u8) -> Option<Month> {
-    match n {
-        1 => Some(Month::January),
-        2 => Some(Month::February),
-        3 => Some(Month::March),
-        4 => Some(Month::April),
-        5 => Some(Month::May),
-        6 => Some(Month::June),
-        7 => Some(Month::July),
-        8 => Some(Month::August),
-        9 => Some(Month::September),
-        10 => Some(Month::October),
-        11 => Some(Month::November),
-        12 => Some(Month::December),
-        _ => None,
-    }
-}
-
 /// Shift a date by the given number of months.
 /// Ambiguous month-ends are shifted backwards as necessary.
 pub fn shift_months(date: Date, months: i32) -> Date {
@@ -30,7 +12,7 @@ pub fn shift_months(date: Date, months: i32) -> Date {
         month += 12;
     }
 
-    let month = month_from_n(month as u8).unwrap();
+    let month = Month::try_from(month as u8).unwrap();
     let month_days = time::util::days_in_year_month(year, month);
 
     day = day.min(month_days);

src/util/mod.rs

@@ -3,7 +3,7 @@ mod protobuf;
 
 pub mod dictionary;
 
-pub use date::{month_from_n, now_sec, shift_months, shift_years};
+pub use date::{now_sec, shift_months, shift_years};
 pub use protobuf::{string_from_pb, ProtoBuilder};
 
 use std::{