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fix: matchAll 入口 flags 单读与构造路径收口

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彭俊皓
2026-09-22 02:45:25 +00:00
parent 29bad1e582
commit bb8a722cf7
1 changed files with 137 additions and 138 deletions
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crates/oxide_builtins/src/string/regex.rs
+137 -138
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@@ -662,9 +662,24 @@ pub(crate) const MALL_RE: &str = "__mal_re__";
/// `String.prototype.matchAll(pattern)`：返回带 `next` 的迭代器，逐步产出全部匹配
/// （要求 RegExp 带 global 标志；普通字符串会被转义成等效正则）。包装器 input
/// 属性存原始字符串值（单元保真），index 属性为码元游标。
///
/// # 步骤
/// 1. receiver 前置校验（RequireObjectCoercible，纯 is_* 读取）。
/// 2. pattern 为 null/undefined：跳过对象分支，直接构造路径。
/// 3. pattern 为对象：真 RegExp 先 flags 单读 g 判定；GetMethod 全链单读，
/// undefined/null 落构造路径，非 callable 非空值抛 TypeError，可调用则
/// Call(matcher, pattern, « thisValue ») 原值返回。
/// 4. 非对象 pattern：跳过对象分支，按字面文本编译载体正则。
///
/// # 边界与前提
/// - ToString(thisValue) 延迟到构造路径实际消费（matcher 直调臂不触发）。
/// - 构造路径（RegExpCreate(pattern, "g") + Invoke）复用
/// `match_all_construct_invoke`，无 callable @@matchAll 时抛 TypeError。
pub fn string_match_all<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
builtins_debug!("String.prototype.matchAll called with {} args", args.len());
let this_val = vm.reg(args[0]);
// receiver 前置校验：null/undefined/symbol 抛 TypeError（规范第 1-2 步
// RequireObjectCoercible，纯 is_* 读取无用户代码，先于一切分叉）。
if this_val.is_null() || this_val.is_undefined() {
return NativeResult::Err(crate::error::create_type_error(
vm,
@@ -674,162 +689,80 @@ pub fn string_match_all<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
if this_val.is_symbol() {
return NativeResult::Err(crate::error::create_type_error(vm, "Cannot convert a Symbol value to a string"));
}
let input_val = match oxide_runtime_api::to_string_value_full(this_val, vm) {
Ok(v) => v,
Err(_) => {
if let Some(exc) = vm.take_uncaught_value() {
return NativeResult::Err(exc);
}
return NativeResult::Err(crate::error::create_type_error(vm, "Cannot convert value to a string"));
}
};
if args.len() < 2 {
builtins_error!("String.prototype.matchAll: invalid receiver");
return NativeResult::Err(JsValue::undefined());
}
let pattern_val = vm.reg(args[1]);
// 规范步骤 2-5：pattern 为 null/undefined 时跳过 IsRegExp 分支，
// 直接 RegExpCreate(this, "g") + Invoke(rx, @@matchAll, « S »)。
// 对象分支条件（IsObject）为假：null/undefined pattern 跳过 flags/GetMethod
// 全部步骤，直接落构造路径。
if pattern_val.is_null() || pattern_val.is_undefined() {
// rx = new RegExp(ToString(this), "g")。
let g_str = vm.new_string("g");
let rx_val = match vm.construct_ctor(
JsValue::from_js_object(vm.session().builtin_world().regexp_constructor.as_ptr() as *mut JsObject),
&[input_val, g_str],
) {
Ok(v) => v,
Err(e) => return NativeResult::Err(e),
};
// Invoke(rx, @@matchAll, « S »)。
let match_all_key = oxide_types::private_key::make_well_known_symbol_key(7);
let rx_ptr = rx_val.as_js_object_ptr();
let proto_val = unsafe { &*rx_ptr }.proto();
let rx_this = JsValue::from_js_object(rx_ptr);
let matcher = match vm.ordinary_get(unsafe { &*rx_ptr }, match_all_key, rx_this) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
if matcher.is_undefined() || matcher.is_null() {
// 查原型链。
if proto_val.is_object() {
let p_ptr = proto_val.as_js_object_ptr();
let p_this = proto_val;
let proto_matcher = match vm.ordinary_get(unsafe { &*p_ptr }, match_all_key, p_this) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
if crate::iterator::is_callable(proto_matcher) {
return match vm.call_function_sync(proto_matcher, rx_this, &[input_val]) {
Ok(v) => NativeResult::Ok(v),
Err(e) => NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
}
}
// 无 callable @@matchAll：构建包装器。
return builder_wrapper(vm, input_val, rx_this);
}
if crate::iterator::is_callable(matcher) {
return match vm.call_function_sync(matcher, rx_this, &[input_val]) {
Ok(v) => NativeResult::Ok(v),
Err(e) => NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
}
return builder_wrapper(vm, input_val, rx_this);
return match_all_construct_invoke(vm, this_val, pattern_val);
}
// 规范：IsRegExp(pattern) 时先检查 g 标志（Node.js 先行校验，早于
// GetMethod 调用），不满足则抛 TypeError；满足后查 GetMethod(pattern,
// @@matchAll)，可调用则直调，否则构建包装器。
if is_regexp_obj(pattern_val, vm) {
let re_ptr = pattern_val.as_js_object_ptr();
// 规范步骤 3.a-c：Get(rx, "flags") → RequireObjectCoercible →
// ToString 含 "g" 判定；getter 抛错传播。
let flags = match crate::regexp::rx_get_flags(vm, re_ptr, pattern_val) {
Ok(f) => f,
Err(e) => return NativeResult::Err(e),
};
// RequireObjectCoercible：flags 为 undefined/null 时抛 TypeError。
// rx_get_flags 已将 undefined 转为 "undefined" 字符串，需额外检查。
let flags_val =
match vm.ordinary_get(unsafe { &*re_ptr }, vm.kernel_core().perm_interner().intern("flags").0, pattern_val)
{
if pattern_val.is_object() {
// 真 RegExp：flags 单读原始值（getter 副作用/抛错只观察一次）→
// RequireObjectCoercible → ToString 含 "g" 判定；g 判定先于 GetMethod。
if is_regexp_obj(pattern_val, vm) {
let re_ptr = pattern_val.as_js_object_ptr();
// SAFETY: pattern_val 已校验为非空对象值。
let re_obj = unsafe { &*re_ptr };
let flags_si = vm.kernel_core().perm_interner().intern("flags").0;
let flags_val = match vm.ordinary_get(re_obj, flags_si, pattern_val) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
if flags_val.is_undefined() || flags_val.is_null() {
return NativeResult::Err(crate::error::create_type_error(
vm,
"String.prototype.matchAll: regex must have global flag",
));
}
if !flags.contains('g') {
return NativeResult::Err(crate::error::create_type_error(
vm,
"String.prototype.matchAll: regex must have global flag",
));
}
// 标志检查通过：查 GetMethod(pattern, @@matchAll)。
let match_all_key = oxide_types::private_key::make_well_known_symbol_key(7);
let re_obj = unsafe { &*re_ptr };
// 先查实例 own。
let own_match_all = match vm.get_own_property_slot(re_obj, match_all_key) {
Some(_) => match vm.ordinary_get(re_obj, match_all_key, pattern_val) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
},
None => JsValue::undefined(),
};
if crate::iterator::is_callable(own_match_all) {
return match vm.call_function_sync(own_match_all, pattern_val, &[input_val]) {
Ok(v) => NativeResult::Ok(v),
Err(e) => NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
}
// 实例 @@matchAll 不存在/undefined/null：回退原型链（GetMethod 对 null/undefined 均返 undefined）。
if own_match_all.is_undefined() || own_match_all.is_null() {
let proto_val = re_obj.proto();
if proto_val.is_object() {
let proto_ptr = proto_val.as_js_object_ptr();
let proto_match_all = match vm.ordinary_get(unsafe { &*proto_ptr }, match_all_key, proto_val) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
if crate::iterator::is_callable(proto_match_all) {
return match vm.call_function_sync(proto_match_all, pattern_val, &[input_val]) {
Ok(v) => NativeResult::Ok(v),
Err(e) => NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
}
// 原型链也无 callable @@matchAll：规范 Invoke 抛 TypeError。
if flags_val.is_undefined() || flags_val.is_null() {
return NativeResult::Err(crate::error::create_type_error(
vm,
"RegExp.prototype[Symbol.matchAll] is not a function",
"String.prototype.matchAll: regex must have global flag",
));
}
let flags_sv = match oxide_runtime_api::to_string_value_full(flags_val, vm) {
Ok(v) => v,
Err(_) => {
if let Some(exc) = vm.take_uncaught_value() {
return NativeResult::Err(exc);
}
return NativeResult::Err(crate::error::create_type_error(vm, "Cannot convert value to a string"));
}
};
if !String::from_utf16_lossy(&vm.string_units(flags_sv)).contains('g') {
return NativeResult::Err(crate::error::create_type_error(
vm,
"String.prototype.matchAll: regex must have global flag",
));
}
}
// 无 callable @@matchAll：规范 Invoke 抛 TypeError。
NativeResult::Err(crate::error::create_type_error(vm, "RegExp.prototype[Symbol.matchAll] is not a function"))
} else {
// 非 RegExp：先查 @@matchAll（规范步骤 6-8，IsRegExp 为 false 时
// 先 ToString(pattern) 转正则，但规范步骤 8 是 Invoke(rx, @@matchAll)。
// 实际上，若 pattern 是对象且有 callable @@matchAll，应直调（类似 RegExp 分支）。
if pattern_val.is_object() {
let match_all_key = oxide_types::private_key::make_well_known_symbol_key(7);
let p_ptr = pattern_val.as_js_object_ptr();
let p_this = pattern_val;
let matcher = match vm.ordinary_get(unsafe { &*p_ptr }, match_all_key, p_this) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
if crate::iterator::is_callable(matcher) {
return match vm.call_function_sync(matcher, p_this, &[input_val]) {
Ok(v) => NativeResult::Ok(v),
Err(e) => NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
}
// GetMethod(pattern, @@matchAll) 全链单次 Get：own 命中 undefined/null
// 即停（Get 语义），不回退原型链。
let match_all_key = oxide_types::private_key::make_well_known_symbol_key(7);
let matcher = match vm.ordinary_get(unsafe { &*pattern_val.as_js_object_ptr() }, match_all_key, pattern_val) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
// GetMethod 返 undefined/null：落构造路径（ToString(thisValue) →
// RegExpCreate(pattern, "g") → Invoke 产物 @@matchAll）。
if matcher.is_undefined() || matcher.is_null() {
return match_all_construct_invoke(vm, this_val, pattern_val);
}
// 按文本编译为 stub（非捕获组，免额外 capture）。
if !crate::iterator::is_callable(matcher) {
return NativeResult::Err(crate::error::create_type_error(
vm,
"String.prototype.matchAll: matcher is not a function",
));
}
// Call(matcher, pattern, « thisValue »)：实参为原始 this 值。
return match vm.call_function_sync(matcher, pattern_val, &[this_val]) {
Ok(v) => NativeResult::Ok(v),
Err(e) => NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
}
// 非对象 pattern：对象分支整体跳过，按文本编译为 stub（非捕获组，免额外
// capture）。
{
let pattern_units = try_string!(as_units(vm, pattern_val)).into_owned();
let pattern_str = String::from_utf16_lossy(&pattern_units);
let escaped = regress::escape(&pattern_str);
@@ -853,10 +786,76 @@ pub fn string_match_all<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
let raw = Box::into_raw(boxed) as *const u8;
stub.set_native_fn(Some(unsafe { oxide_types::object::NativeFnPtr::from_raw(raw as *const ()) }));
let stub_ptr = vm.alloc_object(stub);
// string = ToString(thisValue)：构造路径消费点，仅此臂实际转换。
let input_val = match oxide_runtime_api::to_string_value_full(this_val, vm) {
Ok(v) => v,
Err(_) => {
if let Some(exc) = vm.take_uncaught_value() {
return NativeResult::Err(exc);
}
return NativeResult::Err(crate::error::create_type_error(vm, "Cannot convert value to a string"));
}
};
builder_wrapper(vm, input_val, JsValue::from_js_object(stub_ptr))
}
}
/// 构造路径（规范步骤 4-6）：string = ToString(thisValue) →
/// regexp = RegExpCreate(pattern, "g") → Invoke(regexp, @@matchAll, « string »)。
///
/// # 边界与前提
/// - pattern 为 null/undefined 时构造器内部映射（null → "null" 文本、
/// undefined → 空模式），不在此处重复转换
/// - 构造产物无 callable @@matchAll（含原型链删除）时 Invoke 抛 TypeError
/// - 对象 toString/valueOf 抛出的原始异常原样传播
fn match_all_construct_invoke<H: VmHost>(vm: &mut H, this_val: JsValue, pattern_val: JsValue) -> NativeResult {
// string = ToString(thisValue)。
let input_val = match oxide_runtime_api::to_string_value_full(this_val, vm) {
Ok(v) => v,
Err(_) => {
if let Some(exc) = vm.take_uncaught_value() {
return NativeResult::Err(exc);
}
return NativeResult::Err(crate::error::create_type_error(vm, "Cannot convert value to a string"));
}
};
// regexp = RegExpCreate(pattern, "g")。
let g_str = vm.new_string("g");
let rx_val = match vm.construct_ctor(
JsValue::from_js_object(vm.session().builtin_world().regexp_constructor.as_ptr() as *mut JsObject),
&[pattern_val, g_str],
) {
Ok(v) => v,
Err(e) => return NativeResult::Err(e),
};
if !rx_val.is_object() {
return NativeResult::Err(crate::error::create_type_error(
vm,
"match pattern constructor must return an object",
));
}
// Invoke(regexp, @@matchAll, « string »)：产物全链 Get，无 callable 抛 TypeError。
let match_all_key = oxide_types::private_key::make_well_known_symbol_key(7);
let rx_ptr = rx_val.as_js_object_ptr();
let rx_this = JsValue::from_js_object(rx_ptr);
let matcher = match vm.ordinary_get(unsafe { &*rx_ptr }, match_all_key, rx_this) {
Ok(v) => v,
Err(e) => return NativeResult::err(crate::iterator::engine_error(vm, &e)),
};
if matcher.is_undefined() || matcher.is_null() || !crate::iterator::is_callable(matcher) {
return NativeResult::Err(crate::error::create_type_error(
vm,
"RegExp.prototype[Symbol.matchAll] is not a function",
));
}
match vm.call_function_sync(matcher, rx_this, &[input_val]) {
Ok(v) => NativeResult::Ok(v),
Err(e) => NativeResult::err(crate::iterator::engine_error(vm, &e)),
}
}
/// 构造 matchAll 包装对象：原型挂 `%RegExpStringIteratorPrototype%`，
/// own 属性为 input/index(0)/re 三槽，next 由原型提供。
fn builder_wrapper<H: VmHost>(vm: &mut H, input_val: JsValue, re_obj: JsValue) -> NativeResult {