feat: Date 增加 toTemporalInstant 与 toPrimitive 方法

This commit is contained in:
2026-10-15 14:19:54 +00:00
parent d6b08eea40
commit 5d1426f2b2
6 changed files with 433 additions and 23 deletions
+106
View File
@@ -1181,3 +1181,109 @@ pub fn date_value_of<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
let ms = get_timestamp(obj);
NativeResult::Ok(JsValue::float(ms))
}
/// `Date.prototype.toTemporalInstant()`:把时间戳换算为 epoch 纳秒并构造 Instant。
///
/// # 步骤
/// 1. `date_this` 品牌守卫(非 Date 对象抛 TypeError)。
/// 2. 取 `[[DateValue]]`,非有限(Invalid Date)抛 RangeError。
/// 3. 毫秒 × 10^6 得纳秒,交 `make_instant` 构造 Instant 对象。
///
/// # 边界
/// 有效 Date 时间戳恒为整数毫秒且在 TimeClip 包络内(|t| ≤ 8.64e15),
/// 乘积恒在 i128 内,无溢出面。
pub fn date_to_temporal_instant<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
let obj = unsafe { &*native_try!(date_this(vm, args)) };
let ms = get_timestamp(obj);
if !ms.is_finite() {
return NativeResult::Err(crate::error::create_range_error(vm, "invalid date"));
}
let ns = (ms as i128) * 1_000_000;
crate::temporal::make_instant(vm, ns)
}
/// OrdinaryToPrimitive:按 [first, second] 序逐个查 `toString`/`valueOf`,
/// 首个产出非对象结果的方法返回其结果;两臂均不产出原始值抛 TypeError。
///
/// # 步骤
/// 1. 按 hint 定方法序(string 族 toString 优先,number 族 valueOf 优先)。
/// 2. 逐臂 `Get(O, name)`(receiver = O),null/undefined/非可调用跳过。
/// 3. 调用方法(this = O),结果非对象即返回。
///
/// # 注意事项
/// 用户 getter 与调用抛错经 `take_uncaught_value` 恢复原始异常值,不降级。
fn ordinary_to_primitive<H: VmHost>(vm: &mut H, obj: &JsObject, this_val: JsValue, try_first: &str) -> NativeResult {
let (first, second) = if try_first == "string" {
("toString", "valueOf")
} else {
("valueOf", "toString")
};
for name in [first, second] {
let si = vm.perm_intern(name);
let method = match vm.ordinary_get(obj, si, this_val) {
Ok(m) => m,
Err(msg) => {
return NativeResult::Err(
vm.take_uncaught_value()
.unwrap_or_else(|| crate::error::create_type_error(vm, &msg)),
);
}
};
if method.is_undefined() || method.is_null() {
continue;
}
if !crate::iterator::is_callable(method) {
continue;
}
let result = match vm.call_function_sync(method, this_val, &[]) {
Ok(r) => r,
Err(msg) => {
return NativeResult::Err(
vm.take_uncaught_value()
.unwrap_or_else(|| crate::error::create_type_error(vm, &msg)),
);
}
};
if !result.is_object() {
return NativeResult::Ok(result);
}
}
NativeResult::Err(crate::error::create_type_error(vm, "Cannot convert object to primitive value"))
}
/// `Date.prototype[Symbol.toPrimitive](hint)`:OrdinaryToPrimitive 原始值转换。
///
/// # 步骤
/// 1. this 非对象抛 TypeError(不做 Date 品牌检查,普通对象合法)。
/// 2. hint 须为原始字符串值,严格比较("string"/"default"/"number"),
/// 其余(含 String 对象、带 toString 的对象)抛 TypeError,不做强转。
/// 3. 按 hint 定 tryFirst 走 OrdinaryToPrimitive。
///
/// # 注意事项
/// 不复用 runtime `to_primitive`:其先查 @@toPrimitive 再走 OrdinaryToPrimitive,
/// 语义漂移且对 Date 自身会递归。
pub fn date_to_primitive<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
let this_val = vm.reg(if args.is_empty() { 0 } else { args[0] });
if !this_val.is_object() {
return NativeResult::Err(crate::error::create_type_error(vm, "called on incompatible receiver"));
}
let obj_ptr = this_val.as_js_object_ptr();
if obj_ptr.is_null() {
return NativeResult::Err(crate::error::create_type_error(vm, "called on incompatible receiver"));
}
let obj = unsafe { &*obj_ptr };
let hint_val = if args.len() > 1 { vm.reg(args[1]) } else { JsValue::undefined() };
if !hint_val.is_string() {
return NativeResult::Err(crate::error::create_type_error(vm, "invalid hint"));
}
// SAFETY: hint_val 已确认是字符串值。
let hint = unsafe { (*hint_val.as_string_ptr()).to_owned_string() };
let try_first = match hint.as_str() {
"string" | "default" => "string",
"number" => "number",
_ => return NativeResult::Err(crate::error::create_type_error(vm, "invalid hint")),
};
ordinary_to_primitive(vm, obj, this_val, try_first)
}
@@ -11,6 +11,7 @@ mod time_zone;
mod zoned_date_time;
use common::*;
pub(crate) use common::make_instant;
use difference::*;
pub use duration::*;
pub use instant::*;