pjh123
c230edeb57
@@hasInstance 按 OrdinaryHasInstance 实现（非可调用 this 返回 false、 prototype 非对象抛 TypeError、bound 链递归到最内层 target）； new boundFn() 解包 [[BoundTargetFunction]] 链后转发构造：绑定实参前置、 新对象原型取 target.prototype、new.target 替换为最内层 target。
43 lines
2.0 KiB
Rust
43 lines
2.0 KiB
Rust
use std::sync::Arc;
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use oxide_kernel::builtin::FunctionMethods;
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use oxide_kernel::kernel::{KernelCore, KernelSession};
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use oxide_types::object::{JsObject, PropAttributes};
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use oxide_types::value::JsValue;
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use super::bind_global_value;
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use super::configure_native_constructor;
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/// 把 Function 构造器与原型方法绑定到 global。
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pub fn bind_function(core: &Arc<KernelCore>, session: &KernelSession, global: &mut JsObject) {
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let function_methods = FunctionMethods {
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call: oxide_builtins::function::function_call::<crate::vm::Vm> as *const (),
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apply: oxide_builtins::function::function_apply::<crate::vm::Vm> as *const (),
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bind: oxide_builtins::function::function_bind::<crate::vm::Vm> as *const (),
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to_string: oxide_builtins::function::function_to_string::<crate::vm::Vm> as *const (),
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has_instance: oxide_builtins::function::function_symbol_has_instance::<crate::vm::Vm> as *const (),
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};
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session.builtin_world().bind_function_methods(
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&function_methods,
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core.perm_interner().as_ref(),
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core.shape_forge().as_ref(),
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);
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let function_ctor = session.builtin_world().function_constructor.as_ptr() as *mut JsObject;
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configure_native_constructor(
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unsafe { &mut *function_ctor },
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oxide_builtins::function::function_constructor::<crate::vm::Vm> as *const (),
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1,
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);
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// 设置 Function.length = 1（configure_native_constructor 不写 length 属性），
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// 属性为不可写不可枚举可配置。
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let length_si = core.perm_interner().intern("length").0;
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let length_shape = core.shape_forge().make_shape(unsafe { &*function_ctor }.shape_id(), length_si);
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let ctor = unsafe { &mut *function_ctor };
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ctor.set_shape_id(length_shape);
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ctor.ensure_hash_props().push(JsValue::int(1));
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let length_pos = ctor.hash_props_vec().map_or(0, |v| v.len() as u32).saturating_sub(1);
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ctor.set_data_meta(length_pos, PropAttributes::new(false, false, true));
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bind_global_value(core, global, "Function", JsValue::from_js_object(function_ctor));
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}
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