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feat: 解构模式语义补齐（REST 枚举/getter/computed 排除、IteratorClose、RegAlloc def 干涉、for-in 捕获遮蔽）

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This commit is contained in:
彭俊皓
2026-08-09 15:01:31 +08:00
parent c65f3be179
commit 36fb61fc74
12 changed files with 294 additions and 61 deletions
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crates/oxide_emit/src/shared/binding.rs
+86 -8
View File
@@ -190,23 +190,74 @@ impl Emitter {
fn emit_object_binding(
&self, op: &ObjectPattern, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, ctx: &mut CompileCtx,
) -> Result<(), String> {
// 对象解构先 ToObject(rhs)：null/undefined 抛 TypeError（含空 pattern），
// 原始值包装为对应对象，保证属性读取与 rest 都以对象为源。
// 写到临时寄存器，保留 src_reg 原值（声明初始化路径的返回值语义）。
let obj_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(obj_reg), Operand::Reg(src_reg), Operand::None));
ctx.inst(Inst::new(OpCode::TO_OBJECT, Operand::Reg(obj_reg), Operand::None, Operand::None));
// 有 rest 时构建运行时 excluded 数组：静态 key 直接 push 常量，computed key 求值结果 push 值。
let mut excluded = Vec::new();
let mut excl_arr_reg = None;
let mut excl_push = 0usize;
if op.rest.is_some() {
excl_arr_reg = Some(self.emit_new_excluded_array(ctx));
}
for prop in &op.properties {
let (prop_reg, static_key) = self.emit_object_property_read_key(src_reg, &prop.key, prop.computed, ctx)?;
let (prop_reg, static_key, key_reg) =
self.emit_object_property_read_key(obj_reg, &prop.key, prop.computed, ctx)?;
if let Some(key) = static_key {
excluded.push(key);
excluded.push(key.clone());
if let Some(arr) = excl_arr_reg {
self.emit_push_excluded_key(arr, None, &key, excl_push, ctx);
excl_push += 1;
}
} else if let (Some(arr), Some(key_reg)) = (excl_arr_reg, key_reg) {
self.emit_push_excluded_key(arr, Some(key_reg), "", excl_push, ctx);
excl_push += 1;
}
self.emit_binding_pattern(&prop.value, prop_reg, kind, is_const, ctx)?;
}
if let Some(rest) = &op.rest {
let rest_reg = ctx.alloc_reg();
let excluded_idx = ctx.add_constant(Constant::String(excluded.join("\0")));
ctx.inst(Inst::rest_object(Operand::Reg(rest_reg), Operand::Reg(src_reg), excluded_idx as u32));
ctx.inst(Inst::rest_object(
Operand::Reg(rest_reg),
Operand::Reg(obj_reg),
excluded_idx as u32,
excl_arr_reg.map(Operand::Reg),
));
self.emit_binding_pattern(&rest.argument, rest_reg, kind, is_const, ctx)?;
}
Ok(())
}
/// 新建运行时 excluded 数组（NEW_ARRAY），供 REST_OBJECT 排除 computed key。
fn emit_new_excluded_array(&self, ctx: &mut CompileCtx) -> u32 {
let arr = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::NEW_ARRAY, Operand::Reg(arr), Operand::None, Operand::None));
arr
}
/// 向 excluded 数组下标 `idx` 写入一个键：`key_val` 为运行时寄存器值，否则用 `key_str` 常量。
fn emit_push_excluded_key(
&self, arr: u32, key_val: Option<u32>, key_str: &str, idx: usize, ctx: &mut CompileCtx,
) {
let val_reg = match key_val {
Some(kv) => kv,
None => {
let ki = ctx.add_constant(Constant::String(key_str.to_string()));
let kr = ctx.alloc_reg();
ctx.inst(Inst::load_const(Operand::Reg(kr), ki));
kr
}
};
let elem_idx = ctx.alloc_reg();
let cidx = ctx.add_constant(Constant::Int(idx as i32));
ctx.inst(Inst::load_const(Operand::Reg(elem_idx), cidx));
ctx.inst(Inst::new(OpCode::SET_ELEM, Operand::Reg(arr), Operand::Reg(elem_idx), Operand::Reg(val_reg)));
}
fn emit_assignment_maybe_default(
&self, target: &AssignmentTargetMaybeDefault, src_reg: u32, ctx: &mut CompileCtx,
) -> Result<(), String> {
@@ -260,13 +311,28 @@ impl Emitter {
pub(crate) fn emit_object_assignment(
&self, op: &ObjectAssignmentTarget, src_reg: u32, ctx: &mut CompileCtx,
) -> Result<(), String> {
// 对象解构先 ToObject(rhs)：null/undefined 抛 TypeError（含空 pattern），
// 原始值包装为对应对象，保证属性读取与 rest 都以对象为源。
// 写到临时寄存器，保留 src_reg 原值（解构赋值表达式返回值 = rhs）。
let obj_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(obj_reg), Operand::Reg(src_reg), Operand::None));
ctx.inst(Inst::new(OpCode::TO_OBJECT, Operand::Reg(obj_reg), Operand::None, Operand::None));
let mut excluded = Vec::new();
let mut excl_arr_reg = None;
let mut excl_push = 0usize;
if op.rest.is_some() {
excl_arr_reg = Some(self.emit_new_excluded_array(ctx));
}
for prop in &op.properties {
match prop {
AssignmentTargetProperty::AssignmentTargetPropertyIdentifier(id) => {
let key = id.binding.name.as_str().to_string();
excluded.push(key.clone());
let mut prop_reg = self.emit_object_property_read(src_reg, &key, ctx);
if let Some(arr) = excl_arr_reg {
self.emit_push_excluded_key(arr, None, &key, excl_push, ctx);
excl_push += 1;
}
let mut prop_reg = self.emit_object_property_read(obj_reg, &key, ctx);
if let Some(default_expr) = &id.init {
let name = id.binding.name.as_str();
prop_reg = self.emit_default_if_undefined(prop_reg, default_expr, Some(name), ctx)?;
@@ -281,10 +347,17 @@ impl Emitter {
));
}
AssignmentTargetProperty::AssignmentTargetPropertyProperty(prop) => {
let (prop_reg, static_key) =
self.emit_object_property_read_key(src_reg, &prop.name, prop.computed, ctx)?;
let (prop_reg, static_key, key_reg) =
self.emit_object_property_read_key(obj_reg, &prop.name, prop.computed, ctx)?;
if let Some(key) = static_key {
excluded.push(key);
excluded.push(key.clone());
if let Some(arr) = excl_arr_reg {
self.emit_push_excluded_key(arr, None, &key, excl_push, ctx);
excl_push += 1;
}
} else if let (Some(arr), Some(key_reg)) = (excl_arr_reg, key_reg) {
self.emit_push_excluded_key(arr, Some(key_reg), "", excl_push, ctx);
excl_push += 1;
}
self.emit_assignment_maybe_default(&prop.binding, prop_reg, ctx)?;
}
@@ -293,7 +366,12 @@ impl Emitter {
if let Some(rest) = &op.rest {
let rest_reg = ctx.alloc_reg();
let excluded_idx = ctx.add_constant(Constant::String(excluded.join("\0")));
ctx.inst(Inst::rest_object(Operand::Reg(rest_reg), Operand::Reg(src_reg), excluded_idx as u32));
ctx.inst(Inst::rest_object(
Operand::Reg(rest_reg),
Operand::Reg(obj_reg),
excluded_idx as u32,
excl_arr_reg.map(Operand::Reg),
));
self.emit_assign_target(&rest.target, rest_reg, ctx)?;
}
Ok(())
crates/oxide_emit/src/shared/chain.rs
+3 -3
View File
@@ -281,11 +281,11 @@ impl Emitter {
pub(crate) fn emit_object_property_read_key(
&self, src_reg: u32, key: &PropertyKey, computed: bool, ctx: &mut CompileCtx,
) -> Result<(u32, Option<String>), String> {
) -> Result<(u32, Option<String>, Option<u32>), String> {
if !computed {
let key_name = self.static_property_name(key)?;
let prop_reg = self.emit_object_property_read(src_reg, &key_name, ctx);
return Ok((prop_reg, Some(key_name)));
return Ok((prop_reg, Some(key_name), None));
}
let prop_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(prop_reg), Operand::Reg(src_reg), Operand::None));
@@ -297,6 +297,6 @@ impl Emitter {
Operand::Reg(key_reg),
Operand::Reg(val_reg),
));
Ok((val_reg, None))
Ok((val_reg, None, Some(key_reg)))
}
}