LibJS: Reflect recent editorial changes in the Temporal proposal

See:

- https://github.com/tc39/proposal-temporal/commit/2148441
- https://github.com/tc39/proposal-temporal/commit/08c04cc
- https://github.com/tc39/proposal-temporal/commit/b77da58

Userland/Libraries/LibJS/Runtime/DatePrototype.cpp

@@ -874,7 +874,7 @@ JS_DEFINE_NATIVE_FUNCTION(DatePrototype::to_temporal_instant)
         return {};
     ns = js_bigint(vm.heap(), ns->big_integer().multiplied_by(Crypto::UnsignedBigInteger { 1'000'000 }));
 
-    // 3. Return ? CreateTemporalInstant(ns).
+    // 3. Return ! CreateTemporalInstant(ns).
     return Temporal::create_temporal_instant(global_object, *ns);
 }
 

Userland/Libraries/LibJS/Runtime/Temporal/Instant.cpp

@@ -96,6 +96,7 @@ Instant* to_temporal_instant(GlobalObject& global_object, Value item)
     if (vm.exception())
         return {};
 
+    // 4. Return ! CreateTemporalInstant(ℤ(epochNanoseconds)).
     return create_temporal_instant(global_object, *epoch_nanoseconds);
 }
 
@@ -186,7 +187,10 @@ BigInt* round_temporal_instant(GlobalObject& global_object, BigInt const& nanose
     }
     // 7. Else,
     else {
-        // a. Let incrementNs be increment.
+        // a. Assert: unit is "nanosecond".
+        VERIFY(unit == "nanosecond");
+
+        // b. Let incrementNs be increment.
         increment_nanoseconds = increment;
     }
 

Userland/Libraries/LibJS/Runtime/Temporal/InstantConstructor.cpp

@@ -76,7 +76,7 @@ JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from)
 
     // 1. If Type(item) is Object and item has an [[InitializedTemporalInstant]] internal slot, then
     if (item.is_object() && is<Instant>(item.as_object())) {
-        // a. Return ? CreateTemporalInstant(item.[[Nanoseconds]]).
+        // a. Return ! CreateTemporalInstant(item.[[Nanoseconds]]).
         return create_temporal_instant(global_object, *js_bigint(vm.heap(), static_cast<Instant&>(item.as_object()).nanoseconds().big_integer()));
     }
 
@@ -106,7 +106,7 @@ JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_seconds)
         return {};
     }
 
-    // 5. Return ? CreateTemporalInstant(epochNanoseconds).
+    // 5. Return ! CreateTemporalInstant(epochNanoseconds).
     return create_temporal_instant(global_object, *epoch_nanoseconds);
 }
 
@@ -132,7 +132,7 @@ JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_milliseconds)
         return {};
     }
 
-    // 5. Return ? CreateTemporalInstant(epochNanoseconds).
+    // 5. Return ! CreateTemporalInstant(epochNanoseconds).
     return create_temporal_instant(global_object, *epoch_nanoseconds);
 }
 
@@ -153,7 +153,7 @@ JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_microseconds)
         return {};
     }
 
-    // 4. Return ? CreateTemporalInstant(epochNanoseconds).
+    // 4. Return ! CreateTemporalInstant(epochNanoseconds).
     return create_temporal_instant(global_object, *epoch_nanoseconds);
 }
 
@@ -171,7 +171,7 @@ JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_nanoseconds)
         return {};
     }
 
-    // 3. Return ? CreateTemporalInstant(epochNanoseconds).
+    // 3. Return ! CreateTemporalInstant(epochNanoseconds).
     return create_temporal_instant(global_object, *epoch_nanoseconds);
 }
 

Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp

@@ -200,7 +200,7 @@ JS_DEFINE_NATIVE_FUNCTION(InstantPrototype::round)
     if (vm.exception())
         return {};
 
-    // 15. Return ? CreateTemporalInstant(roundedNs).
+    // 15. Return ! CreateTemporalInstant(roundedNs).
     return create_temporal_instant(global_object, *rounded_ns);
 }
 

Userland/Libraries/LibJS/Runtime/Temporal/Now.cpp

@@ -33,14 +33,14 @@ void Now::initialize(GlobalObject& global_object)
 // 2.1.1 Temporal.now.timeZone ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.timezone
 JS_DEFINE_NATIVE_FUNCTION(Now::time_zone)
 {
-    // 1. Return ? SystemTimeZone().
+    // 1. Return ! SystemTimeZone().
     return system_time_zone(global_object);
 }
 
 // 2.1.2 Temporal.now.instant ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.instant
 JS_DEFINE_NATIVE_FUNCTION(Now::instant)
 {
-    // 1. Return ? SystemInstant().
+    // 1. Return ! SystemInstant().
     return system_instant(global_object);
 }
 
@@ -50,7 +50,7 @@ TimeZone* system_time_zone(GlobalObject& global_object)
     // 1. Let identifier be ! DefaultTimeZone().
     auto identifier = default_time_zone();
 
-    // 2. Return ? CreateTemporalTimeZone(identifier).
+    // 2. Return ! CreateTemporalTimeZone(identifier).
     return create_temporal_time_zone(global_object, identifier);
 }
 
@@ -83,7 +83,7 @@ Instant* system_instant(GlobalObject& global_object)
     // 1. Let ns be ! SystemUTCEpochNanoseconds().
     auto* ns = system_utc_epoch_nanoseconds(global_object);
 
-    // 2. Return ? CreateTemporalInstant(ns).
+    // 2. Return ! CreateTemporalInstant(ns).
     return create_temporal_instant(global_object, *ns);
 }