mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-27 20:21:12 +08:00
feat: class 公有字段 define 语义 + computed key 类定义期求值一次
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@@ -1,6 +1,7 @@
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//! 类静态字段/元素 emit:`emit_class_static_elements`。
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use crate::{CompileCtx, Emitter};
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use oxide_ir::inst::Inst;
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use oxide_ir::operand::Operand;
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use oxide_parser::{ClassElement, PropertyKey};
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@@ -10,14 +11,14 @@ impl Emitter {
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/// static z = this.y + 1` 必须按此顺序),若全部字段先于静态块发出,
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/// `z` 会在 `y` 赋值前读到它。
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pub(crate) fn emit_class_static_elements(
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&self, elements: &[ClassElement], ctor_reg: u32, ctx: &mut CompileCtx,
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&self, elements: &[ClassElement], ctor_reg: u32, key_slots: &[Option<u8>], ctx: &mut CompileCtx,
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) -> Result<(), String> {
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let saved_static_this = ctx.static_block_this_reg;
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// static_block_this_reg 保留 u8(this 槽语义,254 特判),ctor_reg 超 u8 界时报错而非静默截断。
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ctx.static_block_this_reg = Some(
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u8::try_from(ctor_reg).map_err(|_| format!("class constructor register {ctor_reg} exceeds u8 limit"))?,
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);
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for element in elements {
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for (element, &key_slot) in elements.iter().zip(key_slots) {
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match element {
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ClassElement::PropertyDefinition(prop) => {
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let prop = prop.as_ref();
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@@ -30,13 +31,18 @@ impl Emitter {
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ctx,
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)?;
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} else {
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self.emit_public_field_init(
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// 静态字段在类定义期求值:computed key 从类定义期数组取,其余用常量。
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let key_reg = if prop.computed {
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self.emit_class_array_key_reg(key_slot.unwrap_or(0), ctx)?
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} else {
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self.emit_class_key_reg(&prop.key, false, ctx)?
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};
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let value_reg = self.emit_field_value(prop.value.as_ref(), ctx)?;
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ctx.inst(Inst::define_prop(
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Operand::Reg(ctor_reg),
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&prop.key,
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prop.computed,
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prop.value.as_ref(),
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ctx,
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)?;
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Operand::Reg(value_reg),
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Operand::Reg(key_reg),
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));
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}
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}
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}
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