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feat: Iterator.prototype 返回迭代器方法（map/filter/take/drop/flatMap）

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彭俊皓
2026-08-16 16:38:45 +08:00
parent 4ea723764f
commit f1c4b33735
4 changed files with 1696 additions and 4 deletions
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crates/oxide_vm/src/bindings/mod.rs
+50
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@@ -458,6 +458,56 @@ fn bind_iterator_protos(core: &Arc<KernelCore>, session: &KernelSession) {
);
}
// %IteratorPrototype% 的 5 个返回迭代器方法（建 wrapper 挂
// %IteratorHelperPrototype%）：map/filter/take/drop/flatMap，length 均为 1。
let si_map = core.perm_interner().intern("map").0;
if core.shape_forge().lookup_position(iter_proto.shape_id(), si_map).is_none() {
apply_binding_table(
world,
iter_proto,
core,
&[
("map", oxide_builtins::iterator::iterator_map::<crate::vm::Vm> as *const (), 1),
("filter", oxide_builtins::iterator::iterator_filter::<crate::vm::Vm> as *const (), 1),
("take", oxide_builtins::iterator::iterator_take::<crate::vm::Vm> as *const (), 1),
("drop", oxide_builtins::iterator::iterator_drop::<crate::vm::Vm> as *const (), 1),
("flatMap", oxide_builtins::iterator::iterator_flat_map::<crate::vm::Vm> as *const (), 1),
],
);
}
// %IteratorHelperPrototype%：wrapper 结果对象的共享原型（链到
// %IteratorPrototype%），绑 next/return/throw 三方法（throw length=1，
// next/return 为 0）+ @@toStringTag 数据属性 "Iterator Helper"。
let helper_proto_ptr = world.iterator_helper_proto.as_ptr() as *mut JsObject;
let helper_proto = unsafe { &mut *helper_proto_ptr };
let si_next = core.perm_interner().intern("next").0;
if core.shape_forge().lookup_position(helper_proto.shape_id(), si_next).is_none() {
apply_binding_table(
world,
helper_proto,
core,
&[
("next", oxide_builtins::iterator::iterator_helper_next::<crate::vm::Vm> as *const (), 0),
(
"return",
oxide_builtins::iterator::iterator_helper_return::<crate::vm::Vm> as *const (),
0,
),
("throw", oxide_builtins::iterator::iterator_helper_throw::<crate::vm::Vm> as *const (), 1),
],
);
}
if core
.shape_forge()
.lookup_position(helper_proto.shape_id(), sym_to_string_tag)
.is_none()
{
let sf = core.perm_interner().as_ref();
let tag = JsValue::perm_string(sf.string_ptr(sf.intern("Iterator Helper").0));
bind_well_known_data_property(core, helper_proto, 9, tag, PropAttributes::new(false, false, true));
}
// %ArrayIteratorPrototype% 服务 Array/TA 两族；Map/Set 共用按 `__mode__`
// 分发的实现；%RegExpStringIteratorPrototype% 供 matchAll。
bind_iterator_proto_next(