chore: checkpoint before Python removal

vendor/time-macros/src/utc_datetime.rs

@@ -0,0 +1,38 @@
+use std::iter::Peekable;
+
+use proc_macro::{TokenStream, token_stream};
+
+use crate::date::Date;
+use crate::error::Error;
+use crate::time::Time;
+use crate::to_tokens::ToTokenStream;
+use crate::{date, time};
+
+pub(crate) struct UtcDateTime {
+    date: Date,
+    time: Time,
+}
+
+pub(crate) fn parse(chars: &mut Peekable<token_stream::IntoIter>) -> Result<UtcDateTime, Error> {
+    let date = date::parse(chars)?;
+    let time = time::parse(chars)?;
+
+    if let Some(token) = chars.peek() {
+        return Err(Error::UnexpectedToken {
+            tree: token.clone(),
+        });
+    }
+
+    Ok(UtcDateTime { date, time })
+}
+
+impl ToTokenStream for UtcDateTime {
+    fn append_to(self, ts: &mut TokenStream) {
+        quote_append! { ts
+            ::time::UtcDateTime::new(
+                #S(self.date),
+                #S(self.time),
+            )
+        }
+    }
+}