build(rust): vendor googletest crate

third_party/crates/rustversion-1.0.23/src/date.rs

@@ -0,0 +1,50 @@
+use crate::error::{Error, Result};
+use crate::iter::Iter;
+use crate::{time, token};
+use proc_macro::Group;
+use std::fmt::{self, Display};
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Date {
+    pub year: u16,
+    pub month: u8,
+    pub day: u8,
+}
+
+impl Display for Date {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            formatter,
+            "{:04}-{:02}-{:02}",
+            self.year, self.month, self.day,
+        )
+    }
+}
+
+pub fn parse(paren: Group, iter: Iter) -> Result<Date> {
+    try_parse(iter).map_err(|()| {
+        let msg = format!("expected nightly date, like {}", time::today());
+        Error::group(paren, msg)
+    })
+}
+
+fn try_parse(iter: Iter) -> Result<Date, ()> {
+    let year = token::parse_literal(iter).map_err(drop)?;
+    token::parse_punct(iter, '-').map_err(drop)?;
+    let month = token::parse_literal(iter).map_err(drop)?;
+    token::parse_punct(iter, '-').map_err(drop)?;
+    let day = token::parse_literal(iter).map_err(drop)?;
+
+    let year = year.to_string().parse::<u64>().map_err(drop)?;
+    let month = month.to_string().parse::<u64>().map_err(drop)?;
+    let day = day.to_string().parse::<u64>().map_err(drop)?;
+    if year >= 3000 || month > 12 || day > 31 {
+        return Err(());
+    }
+
+    Ok(Date {
+        year: year as u16,
+        month: month as u8,
+        day: day as u8,
+    })
+}