Ensure parsing throws with unknown critical annotations (#63)

Author: jedel1043

src/components/date.rs

@@ -847,4 +847,20 @@ mod tests {
             assert!(Date::<()>::from_str(s).is_err())
         }
     }
+
+    // test262/test/built-ins/Temporal/Calendar/prototype/day/argument-string-critical-unknown-annotation.js
+    #[test]
+    fn argument_string_critical_unknown_annotation() {
+        const INVALID_STRINGS: [&str; 6] = [
+            "1970-01-01[!foo=bar]",
+            "1970-01-01T00:00[!foo=bar]",
+            "1970-01-01T00:00[UTC][!foo=bar]",
+            "1970-01-01T00:00[u-ca=iso8601][!foo=bar]",
+            "1970-01-01T00:00[UTC][!foo=bar][u-ca=iso8601]",
+            "1970-01-01T00:00[foo=bar][!_foo-bar0=Dont-Ignore-This-99999999999]",
+        ];
+        for s in INVALID_STRINGS {
+            assert!(Date::<()>::from_str(s).is_err())
+        }
+    }
 }

src/parsers.rs

@@ -38,13 +38,14 @@ fn parse_ixdtf(source: &str, variant: ParseVariant) -> TemporalResult<IxdtfParse
                 }
                 None => first_calendar = Some(annotation),
             }
+            return None;
         }
 
-        // Ignore all invalid annotations
-        None
+        // Make the parser handle any unknown annotation.
+        Some(annotation)
     });
 
-    let mut result = match variant {
+    let mut record = match variant {
         ParseVariant::YearMonth => parser.parse_year_month_with_annotation_handler(handler),
         ParseVariant::MonthDay => parser.parse_month_day_with_annotation_handler(handler),
         ParseVariant::DateTime => parser.parse_with_annotation_handler(handler),
@@ -59,15 +60,15 @@ fn parse_ixdtf(source: &str, variant: ParseVariant) -> TemporalResult<IxdtfParse
     }
 
     // Validate that the DateRecord exists.
-    if result.date.is_none() {
+    if record.date.is_none() {
         return Err(
             TemporalError::syntax().with_message("DateTime strings must contain a Date value.")
         );
     }
 
-    result.calendar = first_calendar.map(|v| v.value);
+    record.calendar = first_calendar.map(|v| v.value);
 
-    Ok(result)
+    Ok(record)
 }
 
 /// A utility function for parsing a `DateTime` string