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docs: 补充注释与格式化

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爱特每羊队
2026-08-06 23:10:27 +08:00
parent 4e0fd762c2
commit 328b8a3ddc
156 changed files with 2393 additions and 1687 deletions
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crates/oxide_emit/src/shared/binding.rs
+40 -11
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@@ -3,10 +3,10 @@
//! `emit_object_binding`、`emit_assign_target` 等。
use crate::{CompileCtx, Emitter};
use oxide_ir::inst::Inst;
use oxide_ir::operand::Operand;
use oxide_bytecode::module::Constant;
use oxide_bytecode::opcode::OpCode;
use oxide_ir::inst::Inst;
use oxide_ir::operand::Operand;
use oxide_parser::{
ArrayAssignmentTarget, ArrayPattern, AssignmentTarget, AssignmentTargetMaybeDefault, AssignmentTargetProperty,
BindingPattern, Expression, ObjectAssignmentTarget, ObjectPattern, VariableDeclarationKind,
@@ -18,12 +18,22 @@ impl Emitter {
) -> Result<u32, String> {
let undef_reg = self.emit_undefined(ctx);
let eq_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::STRICT_EQ, Operand::Reg(eq_reg), Operand::Reg(val_reg), Operand::Reg(undef_reg)));
ctx.inst(Inst::new(
OpCode::STRICT_EQ,
Operand::Reg(eq_reg),
Operand::Reg(val_reg),
Operand::Reg(undef_reg),
));
// val != undefined（eq 为 false）→ 跳过默认值
let end_label = ctx.next_label_id();
ctx.inst(Inst::jmp_if_false(eq_reg, end_label));
let default_reg = self.emit_expression(default_expr, ctx)?;
ctx.inst(Inst::new(OpCode::LOAD_VAR, Operand::Reg(val_reg), Operand::Reg(default_reg), Operand::None));
ctx.inst(Inst::new(
OpCode::LOAD_VAR,
Operand::Reg(val_reg),
Operand::Reg(default_reg),
Operand::None,
));
ctx.labels.set_label_pos(end_label, ctx.insts.len());
Ok(val_reg)
}
@@ -32,8 +42,7 @@ impl Emitter {
&self, name: &str, src_reg: u32, kind: VariableDeclarationKind, is_const: bool, ctx: &mut CompileCtx,
) -> Result<(), String> {
let target_reg = if matches!(kind, VariableDeclarationKind::Var) {
// `var` names are pre-declared (hoisting); reuse the pre-registered slot
// instead of allocating a new one so n_registers matches let/const.
// `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。
if let Some(reg) = ctx.scopes.symbols.lookup_any(name) {
reg
} else {
@@ -47,13 +56,23 @@ impl Emitter {
var_reg
};
if let Some(&cell_idx) = ctx.captured_bindings.get(name) {
ctx.inst(Inst::new(OpCode::MAKE_CELL, Operand::Reg(src_reg), Operand::Imm(cell_idx as u16), Operand::None));
ctx.inst(Inst::new(
OpCode::MAKE_CELL,
Operand::Reg(src_reg),
Operand::Imm(cell_idx as u16),
Operand::None,
));
} else {
// B011: const 声明路径 STORE_VAR 恒 b=0，不查运行时 guard。
// const 声明路径 STORE_VAR 恒 b=0，不查运行时 guard。
// guard 读 regs[rd] 判断槽是否已初始化，依赖槽初始为 undefined；
// 声明冗余检查由编译期 declare() 完成（重复声明编译报错），
// 运行时 guard 只服务"对 const 再赋值"（赋值路径，见 emit_assign_target）。
ctx.inst(Inst::new(OpCode::STORE_VAR, Operand::Reg(target_reg), Operand::Reg(src_reg), Operand::Imm(0)));
ctx.inst(Inst::new(
OpCode::STORE_VAR,
Operand::Reg(target_reg),
Operand::Reg(src_reg),
Operand::Imm(0),
));
}
ctx.init_var(name);
Ok(())
@@ -132,9 +151,19 @@ impl Emitter {
ctx.inst(Inst::jmp_if_false(has_reg, loop_end));
let val_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::FOR_OF_NEXT, Operand::Reg(val_reg), Operand::None, Operand::None));
ctx.inst(Inst::new(OpCode::SET_ELEM, Operand::Reg(rest_reg), Operand::Reg(idx_reg), Operand::Reg(val_reg)));
ctx.inst(Inst::new(
OpCode::SET_ELEM,
Operand::Reg(rest_reg),
Operand::Reg(idx_reg),
Operand::Reg(val_reg),
));
let tmp_reg = ctx.alloc_reg();
ctx.inst(Inst::new(OpCode::INC_PRE, Operand::Reg(idx_reg), Operand::Reg(tmp_reg), Operand::Reg(tmp_reg)));
ctx.inst(Inst::new(
OpCode::INC_PRE,
Operand::Reg(idx_reg),
Operand::Reg(tmp_reg),
Operand::Reg(tmp_reg),
));
ctx.inst(Inst::jmp(loop_start));
ctx.labels.set_label_pos(loop_end, ctx.insts.len());
Ok(rest_reg)