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feat: 循环 let/const 每迭代绑定（MAKE_CELL_FRESH + 解构捕获修复）

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This commit is contained in:
彭俊皓
2026-08-10 10:18:39 +08:00
parent e03ec0f635
commit 80cb1c2feb
17 changed files with 320 additions and 46 deletions
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crates/oxide_emit/src/shared/binding.rs
+19 -13
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@@ -48,8 +48,11 @@ impl Emitter {
Ok(val_reg)
}
/// 绑定单个标识符到槽位。`fresh_cell` 为 true 时对被捕获绑定用 MAKE_CELL_FRESH
/// （循环每迭代绑定：无条件新建 cell，本迭代闭包捕获新 cell）。
fn emit_bind_target(
&self, name: &str, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, ctx: &mut CompileCtx,
&self, name: &str, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, fresh_cell: bool,
ctx: &mut CompileCtx,
) -> Result<(), String> {
let target_reg = if matches!(kind, VariableDeclarationKind::Var) {
// `var` 名已预声明（hoisting），复用预登记槽位而非新分配，使 n_registers 与 let/const 一致。
@@ -66,8 +69,9 @@ impl Emitter {
var_reg
};
if let Some(&cell_idx) = ctx.captured_bindings.get(name) {
let op = if fresh_cell { OpCode::MAKE_CELL_FRESH } else { OpCode::MAKE_CELL };
ctx.inst(Inst::new(
OpCode::MAKE_CELL,
op,
Operand::Reg(src_reg),
Operand::Imm(cell_idx as u16),
Operand::None,
@@ -119,14 +123,14 @@ impl Emitter {
pub(crate) fn emit_binding_pattern(
&self, pattern: &BindingPattern, src_reg: u32, kind: VariableDeclarationKind, is_const: bool,
ctx: &mut CompileCtx,
fresh_cell: bool, ctx: &mut CompileCtx,
) -> Result<(), String> {
match pattern {
BindingPattern::BindingIdentifier(bi) => {
self.emit_bind_target(bi.name.as_str(), src_reg, kind, is_const, ctx)
self.emit_bind_target(bi.name.as_str(), src_reg, kind, is_const, fresh_cell, ctx)
}
BindingPattern::ArrayPattern(ap) => self.emit_array_binding(ap, src_reg, kind, is_const, ctx),
BindingPattern::ObjectPattern(op) => self.emit_object_binding(op, src_reg, kind, is_const, ctx),
BindingPattern::ArrayPattern(ap) => self.emit_array_binding(ap, src_reg, kind, is_const, fresh_cell, ctx),
BindingPattern::ObjectPattern(op) => self.emit_object_binding(op, src_reg, kind, is_const, fresh_cell, ctx),
BindingPattern::AssignmentPattern(ap) => {
// `[x = fn]`：默认值函数按绑定名推断 name。
let name = match &ap.left {
@@ -134,13 +138,14 @@ impl Emitter {
_ => None,
};
let val_reg = self.emit_default_if_undefined(src_reg, &ap.right, name, ctx)?;
self.emit_binding_pattern(&ap.left, val_reg, kind, is_const, ctx)
self.emit_binding_pattern(&ap.left, val_reg, kind, is_const, fresh_cell, ctx)
}
}
}
fn emit_array_binding(
&self, ap: &ArrayPattern, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, ctx: &mut CompileCtx,
&self, ap: &ArrayPattern, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, fresh_cell: bool,
ctx: &mut CompileCtx,
) -> Result<(), String> {
ctx.inst(Inst::new(OpCode::FOR_OF_INIT, Operand::None, Operand::Reg(src_reg), Operand::None));
for elem in &ap.elements {
@@ -149,12 +154,12 @@ impl Emitter {
let val_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::FOR_OF_NEXT, Operand::Reg(val_reg), Operand::None, Operand::None));
if let Some(pattern) = elem {
self.emit_binding_pattern(pattern, val_reg, kind, is_const, ctx)?;
self.emit_binding_pattern(pattern, val_reg, kind, is_const, fresh_cell, ctx)?;
}
}
if let Some(rest) = &ap.rest {
let rest_reg = self.emit_collect_rest_array(ctx)?;
self.emit_binding_pattern(&rest.argument, rest_reg, kind, is_const, ctx)?;
self.emit_binding_pattern(&rest.argument, rest_reg, kind, is_const, fresh_cell, ctx)?;
}
ctx.inst(Inst::new(OpCode::FOR_OF_CLOSE, Operand::None, Operand::None, Operand::None));
Ok(())
@@ -193,7 +198,8 @@ impl Emitter {
}
fn emit_object_binding(
&self, op: &ObjectPattern, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, ctx: &mut CompileCtx,
&self, op: &ObjectPattern, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, fresh_cell: 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。
@@ -221,7 +227,7 @@ impl Emitter {
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)?;
self.emit_binding_pattern(&prop.value, prop_reg, kind, is_const, fresh_cell, ctx)?;
}
if let Some(rest) = &op.rest {
let rest_reg = ctx.alloc_reg();
@@ -232,7 +238,7 @@ impl Emitter {
excluded_idx as u32,
excl_arr_reg.map(Operand::Reg),
));
self.emit_binding_pattern(&rest.argument, rest_reg, kind, is_const, ctx)?;
self.emit_binding_pattern(&rest.argument, rest_reg, kind, is_const, fresh_cell, ctx)?;
}
Ok(())
}