Translate TOML datetime properly

library/src/compute/data.rs

@@ -1,4 +1,5 @@
 use typst::diag::{format_xml_like_error, FileError};
+use typst::eval::Datetime;
 
 use crate::prelude::*;
 
@@ -268,8 +269,24 @@ fn convert_toml(value: toml::Value) -> Value {
             .map(|(key, value)| (key.into(), convert_toml(value)))
             .collect::<Dict>()
             .into_value(),
-        // TODO: Make it use native date/time object(s) once it is implemented.
+        toml::Value::Datetime(v) => match (v.date, v.time) {
-        toml::Value::Datetime(v) => v.to_string().into_value(),
+            (None, None) => Value::None,
+            (Some(date), None) => {
+                Datetime::from_ymd(date.year as i32, date.month, date.day).into_value()
+            }
+            (None, Some(time)) => {
+                Datetime::from_hms(time.hour, time.minute, time.second).into_value()
+            }
+            (Some(date), Some(time)) => Datetime::from_ymd_hms(
+                date.year as i32,
+                date.month,
+                date.day,
+                time.hour,
+                time.minute,
+                time.second,
+            )
+            .into_value(),
+        },
     }
 }
 

src/eval/datetime.rs

@@ -16,9 +16,9 @@ pub enum Datetime {
     /// Representation as a date.
     Date(time::Date),
     /// Representation as a time.
-    Datetime(time::PrimitiveDateTime),
-    /// Representation as a combination of date and time.
     Time(time::Time),
+    /// Representation as a combination of date and time.
+    Datetime(time::PrimitiveDateTime),
 }
 
 impl Datetime {

tests/typ/compute/data.typ

@@ -48,11 +48,18 @@
 #test(data.integer, 42)
 #test(data.float, 3.14)
 #test(data.boolean, true)
-#test(data.date_time, "2023-02-01T15:38:57Z")
 #test(data.array, (1, "string", 3.0, false))
 #test(data.inline_table, ("first": "amazing", "second": "greater") )
 #test(data.table.element, 5)
 #test(data.table.others, (false, "indeed", 7))
+#test(data.date_time, datetime(
+  year: 2023,
+  month: 2,
+  day: 1,
+  hour: 15,
+  minute: 38,
+  second: 57,
+))
 
 ---
 // Error: 7-18 failed to parse toml file: expected `.`, `=`, index 15-15