mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-24 10:41:11 +08:00
470 lines
20 KiB
Rust
470 lines
20 KiB
Rust
//! emit 前置 pass：builtin 引用预扫描 + 声明预登记。
|
||
//!
|
||
//! 在生成临时寄存器前遍历 AST，把内置全局标识符预先登记到固定寄存器槽
|
||
//! （builtin_reg_map），避免与临时寄存器池冲突；同时预声明函数/var 声明，
|
||
//! 支持提升语义。
|
||
|
||
use crate::{CompileCtx, Emitter};
|
||
use oxide_parser::{BindingPattern, Expression, Statement, VariableDeclarationKind};
|
||
|
||
impl Emitter {
|
||
/// 在临时寄存器池之前分配 builtin 槽位。
|
||
pub(crate) fn pre_register_builtin_references(&self, stmts: &[Statement], ctx: &mut CompileCtx) {
|
||
for stmt in stmts {
|
||
self.pre_scan_builtin_stmt(stmt, ctx);
|
||
}
|
||
}
|
||
|
||
fn pre_scan_builtin_stmt(&self, stmt: &Statement, ctx: &mut CompileCtx) {
|
||
match stmt {
|
||
Statement::ExpressionStatement(es) => self.pre_scan_builtin_expr(&es.expression, ctx),
|
||
Statement::VariableDeclaration(vd) => {
|
||
for d in &vd.declarations {
|
||
if let Some(init) = &d.init {
|
||
self.pre_scan_builtin_expr(init, ctx);
|
||
}
|
||
}
|
||
}
|
||
Statement::ReturnStatement(rs) => {
|
||
if let Some(a) = &rs.argument {
|
||
self.pre_scan_builtin_expr(a, ctx);
|
||
}
|
||
}
|
||
Statement::IfStatement(is) => {
|
||
self.pre_scan_builtin_expr(&is.test, ctx);
|
||
self.pre_scan_builtin_stmt(&is.consequent, ctx);
|
||
if let Some(alt) = &is.alternate {
|
||
self.pre_scan_builtin_stmt(alt, ctx);
|
||
}
|
||
}
|
||
Statement::WhileStatement(wh) => {
|
||
self.pre_scan_builtin_expr(&wh.test, ctx);
|
||
self.pre_scan_builtin_stmt(&wh.body, ctx);
|
||
}
|
||
Statement::DoWhileStatement(dw) => {
|
||
self.pre_scan_builtin_stmt(&dw.body, ctx);
|
||
self.pre_scan_builtin_expr(&dw.test, ctx);
|
||
}
|
||
Statement::ForStatement(fs) => {
|
||
if let Some(init) = &fs.init {
|
||
if let Some(e) = init.as_expression() {
|
||
self.pre_scan_builtin_expr(e, ctx);
|
||
} else if let oxide_parser::ForStatementInit::VariableDeclaration(decl) = init {
|
||
for d in &decl.declarations {
|
||
if let Some(init_expr) = &d.init {
|
||
self.pre_scan_builtin_expr(init_expr, ctx);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if let Some(t) = &fs.test {
|
||
self.pre_scan_builtin_expr(t, ctx);
|
||
}
|
||
if let Some(u) = &fs.update {
|
||
self.pre_scan_builtin_expr(u, ctx);
|
||
}
|
||
self.pre_scan_builtin_stmt(&fs.body, ctx);
|
||
}
|
||
Statement::ForInStatement(fi) => {
|
||
self.pre_scan_builtin_expr(&fi.right, ctx);
|
||
self.pre_scan_builtin_stmt(&fi.body, ctx);
|
||
}
|
||
Statement::ForOfStatement(fo) => {
|
||
self.pre_scan_builtin_expr(&fo.right, ctx);
|
||
self.pre_scan_builtin_stmt(&fo.body, ctx);
|
||
}
|
||
Statement::SwitchStatement(sw) => {
|
||
self.pre_scan_builtin_expr(&sw.discriminant, ctx);
|
||
for case in &sw.cases {
|
||
if let Some(test) = &case.test {
|
||
self.pre_scan_builtin_expr(test, ctx);
|
||
}
|
||
for s in &case.consequent {
|
||
self.pre_scan_builtin_stmt(s, ctx);
|
||
}
|
||
}
|
||
}
|
||
Statement::ThrowStatement(ts) => {
|
||
self.pre_scan_builtin_expr(&ts.argument, ctx);
|
||
}
|
||
Statement::TryStatement(ts) => {
|
||
for s in &ts.block.body {
|
||
self.pre_scan_builtin_stmt(s, ctx);
|
||
}
|
||
if let Some(handler) = &ts.handler {
|
||
for s in &handler.body.body {
|
||
self.pre_scan_builtin_stmt(s, ctx);
|
||
}
|
||
}
|
||
if let Some(finalizer) = &ts.finalizer {
|
||
for s in &finalizer.body {
|
||
self.pre_scan_builtin_stmt(s, ctx);
|
||
}
|
||
}
|
||
}
|
||
Statement::BlockStatement(bs) => {
|
||
for s in &bs.body {
|
||
self.pre_scan_builtin_stmt(s, ctx);
|
||
}
|
||
}
|
||
Statement::LabeledStatement(ls) => self.pre_scan_builtin_stmt(&ls.body, ctx),
|
||
Statement::WithStatement(ws) => {
|
||
self.pre_scan_builtin_expr(&ws.object, ctx);
|
||
self.pre_scan_builtin_stmt(&ws.body, ctx);
|
||
}
|
||
Statement::ClassDeclaration(cd) => {
|
||
if let Some(super_class) = &cd.super_class {
|
||
self.pre_scan_builtin_expr(super_class, ctx);
|
||
}
|
||
}
|
||
Statement::FunctionDeclaration(_) | Statement::BreakStatement(_) | Statement::ContinueStatement(_) => {}
|
||
_ => {}
|
||
}
|
||
}
|
||
|
||
fn pre_scan_builtin_expr(&self, expr: &Expression, ctx: &mut CompileCtx) {
|
||
match expr {
|
||
Expression::Identifier(ident) => {
|
||
if CompileCtx::is_known_builtin(ident.name.as_str()) {
|
||
let _ = ctx.lookup_or_builtin(ident.name.as_str());
|
||
}
|
||
}
|
||
Expression::BinaryExpression(bin) => {
|
||
self.pre_scan_builtin_expr(&bin.left, ctx);
|
||
self.pre_scan_builtin_expr(&bin.right, ctx);
|
||
}
|
||
Expression::UnaryExpression(un) => {
|
||
self.pre_scan_builtin_expr(&un.argument, ctx);
|
||
}
|
||
Expression::CallExpression(call) => {
|
||
self.pre_scan_builtin_expr(&call.callee, ctx);
|
||
for arg in &call.arguments {
|
||
self.pre_scan_builtin_arg(arg, ctx);
|
||
}
|
||
}
|
||
Expression::NewExpression(ne) => {
|
||
self.pre_scan_builtin_expr(&ne.callee, ctx);
|
||
for arg in &ne.arguments {
|
||
self.pre_scan_builtin_arg(arg, ctx);
|
||
}
|
||
}
|
||
Expression::LogicalExpression(log) => {
|
||
self.pre_scan_builtin_expr(&log.left, ctx);
|
||
self.pre_scan_builtin_expr(&log.right, ctx);
|
||
}
|
||
Expression::ConditionalExpression(cond) => {
|
||
self.pre_scan_builtin_expr(&cond.test, ctx);
|
||
self.pre_scan_builtin_expr(&cond.consequent, ctx);
|
||
self.pre_scan_builtin_expr(&cond.alternate, ctx);
|
||
}
|
||
Expression::PrivateInExpression(pin) => {
|
||
self.pre_scan_builtin_expr(&pin.right, ctx);
|
||
}
|
||
Expression::SequenceExpression(seq) => {
|
||
for e in &seq.expressions {
|
||
self.pre_scan_builtin_expr(e, ctx);
|
||
}
|
||
}
|
||
Expression::AssignmentExpression(assign) => {
|
||
if let Some(target) = assign.left.as_simple_assignment_target() {
|
||
self.pre_scan_builtin_target(target, ctx);
|
||
}
|
||
self.pre_scan_builtin_expr(&assign.right, ctx);
|
||
}
|
||
Expression::UpdateExpression(update) => {
|
||
self.pre_scan_builtin_target(&update.argument, ctx);
|
||
}
|
||
Expression::TemplateLiteral(tl) => {
|
||
for e in &tl.expressions {
|
||
self.pre_scan_builtin_expr(e, ctx);
|
||
}
|
||
}
|
||
Expression::TaggedTemplateExpression(tt) => {
|
||
self.pre_scan_builtin_expr(&tt.tag, ctx);
|
||
for e in &tt.quasi.expressions {
|
||
self.pre_scan_builtin_expr(e, ctx);
|
||
}
|
||
}
|
||
Expression::ObjectExpression(obj) => {
|
||
for prop in &obj.properties {
|
||
match prop {
|
||
oxide_parser::ObjectPropertyKind::ObjectProperty(p) => {
|
||
if p.computed {
|
||
self.pre_scan_builtin_expr(p.key.to_expression(), ctx);
|
||
}
|
||
self.pre_scan_builtin_expr(&p.value, ctx);
|
||
}
|
||
oxide_parser::ObjectPropertyKind::SpreadProperty(spread) => {
|
||
self.pre_scan_builtin_expr(&spread.argument, ctx);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
Expression::ArrayExpression(arr) => {
|
||
for e in &arr.elements {
|
||
if let Some(e) = e.as_expression() {
|
||
self.pre_scan_builtin_expr(e, ctx);
|
||
}
|
||
}
|
||
}
|
||
Expression::PrivateFieldExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
}
|
||
Expression::StaticMemberExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
}
|
||
Expression::ComputedMemberExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
self.pre_scan_builtin_expr(&member.expression, ctx);
|
||
}
|
||
Expression::ChainExpression(chain) => {
|
||
self.pre_scan_builtin_chain(&chain.expression, ctx);
|
||
}
|
||
Expression::ParenthesizedExpression(p) => self.pre_scan_builtin_expr(&p.expression, ctx),
|
||
Expression::YieldExpression(ye) => {
|
||
if let Some(a) = &ye.argument {
|
||
self.pre_scan_builtin_expr(a, ctx);
|
||
}
|
||
}
|
||
Expression::AwaitExpression(ae) => self.pre_scan_builtin_expr(&ae.argument, ctx),
|
||
Expression::ArrowFunctionExpression(_)
|
||
| Expression::FunctionExpression(_)
|
||
| Expression::ClassExpression(_) => {}
|
||
_ => {}
|
||
}
|
||
}
|
||
|
||
fn pre_scan_builtin_target(&self, target: &oxide_parser::SimpleAssignmentTarget, ctx: &mut CompileCtx) {
|
||
match target {
|
||
oxide_parser::SimpleAssignmentTarget::StaticMemberExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
}
|
||
oxide_parser::SimpleAssignmentTarget::ComputedMemberExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
self.pre_scan_builtin_expr(&member.expression, ctx);
|
||
}
|
||
oxide_parser::SimpleAssignmentTarget::PrivateFieldExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
}
|
||
_ => {}
|
||
}
|
||
}
|
||
|
||
fn pre_scan_builtin_chain(&self, element: &oxide_parser::ChainElement, ctx: &mut CompileCtx) {
|
||
match element {
|
||
oxide_parser::ChainElement::StaticMemberExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
}
|
||
oxide_parser::ChainElement::ComputedMemberExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
self.pre_scan_builtin_expr(&member.expression, ctx);
|
||
}
|
||
oxide_parser::ChainElement::PrivateFieldExpression(member) => {
|
||
self.pre_scan_builtin_expr(&member.object, ctx);
|
||
}
|
||
oxide_parser::ChainElement::CallExpression(call) => {
|
||
self.pre_scan_builtin_expr(&call.callee, ctx);
|
||
for arg in &call.arguments {
|
||
self.pre_scan_builtin_arg(arg, ctx);
|
||
}
|
||
}
|
||
_ => {}
|
||
}
|
||
}
|
||
|
||
/// 遍历调用实参：spread 内部表达式也纳入 builtin 预扫描。
|
||
fn pre_scan_builtin_arg(&self, arg: &oxide_parser::Argument, ctx: &mut CompileCtx) {
|
||
if let Some(e) = arg.as_expression() {
|
||
self.pre_scan_builtin_expr(e, ctx);
|
||
} else if let oxide_parser::Argument::SpreadElement(sp) = arg {
|
||
self.pre_scan_builtin_expr(&sp.argument, ctx);
|
||
}
|
||
}
|
||
|
||
pub(crate) fn predeclare_function_declarations(&self, statements: &[Statement], ctx: &mut CompileCtx) {
|
||
for statement in statements {
|
||
let Statement::FunctionDeclaration(function) = statement else {
|
||
continue;
|
||
};
|
||
let Some(identifier) = &function.id else {
|
||
continue;
|
||
};
|
||
let reg = ctx.alloc_reg();
|
||
let _ = ctx.declare_initialized(identifier.name.as_str(), reg, VariableDeclarationKind::Var, false);
|
||
}
|
||
}
|
||
|
||
/// 预声明语句列表中的全部 `var` 绑定，使先发的提升函数声明能解析它们。
|
||
/// 顶层 `var` 名在编译闭包捕获它的函数体时必须可见。
|
||
pub(crate) fn predeclare_var_declarations(&self, statements: &[Statement], ctx: &mut CompileCtx) {
|
||
for statement in statements {
|
||
match statement {
|
||
Statement::VariableDeclaration(decl) => {
|
||
if !matches!(decl.kind, VariableDeclarationKind::Var) {
|
||
continue;
|
||
}
|
||
for d in &decl.declarations {
|
||
if let oxide_parser::BindingPattern::BindingIdentifier(bi) = &d.id {
|
||
let reg = ctx.alloc_reg();
|
||
let _ = ctx.declare_initialized(bi.name.as_str(), reg, VariableDeclarationKind::Var, false);
|
||
}
|
||
}
|
||
}
|
||
Statement::BlockStatement(bs) => self.predeclare_var_declarations(&bs.body, ctx),
|
||
Statement::IfStatement(is) => {
|
||
self.predeclare_var_declarations(std::slice::from_ref(&is.consequent), ctx);
|
||
if let Some(alt) = &is.alternate {
|
||
self.predeclare_var_declarations(std::slice::from_ref(alt), ctx);
|
||
}
|
||
}
|
||
Statement::WhileStatement(wh) => {
|
||
self.predeclare_var_declarations(std::slice::from_ref(&wh.body), ctx);
|
||
}
|
||
Statement::DoWhileStatement(dw) => {
|
||
self.predeclare_var_declarations(std::slice::from_ref(&dw.body), ctx);
|
||
}
|
||
Statement::ForStatement(fs) => {
|
||
if let Some(oxide_parser::ForStatementInit::VariableDeclaration(decl)) = &fs.init {
|
||
if matches!(decl.kind, VariableDeclarationKind::Var) {
|
||
for d in &decl.declarations {
|
||
if let oxide_parser::BindingPattern::BindingIdentifier(bi) = &d.id {
|
||
let reg = ctx.alloc_reg();
|
||
let _ = ctx.declare_initialized(
|
||
bi.name.as_str(),
|
||
reg,
|
||
VariableDeclarationKind::Var,
|
||
false,
|
||
);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
self.predeclare_var_declarations(std::slice::from_ref(&fs.body), ctx);
|
||
}
|
||
Statement::SwitchStatement(sw) => {
|
||
for case in &sw.cases {
|
||
self.predeclare_var_declarations(&case.consequent, ctx);
|
||
}
|
||
}
|
||
Statement::TryStatement(ts) => {
|
||
self.predeclare_var_declarations(&ts.block.body, ctx);
|
||
if let Some(handler) = &ts.handler {
|
||
self.predeclare_var_declarations(&handler.body.body, ctx);
|
||
}
|
||
if let Some(finalizer) = &ts.finalizer {
|
||
self.predeclare_var_declarations(&finalizer.body, ctx);
|
||
}
|
||
}
|
||
Statement::LabeledStatement(ls) => {
|
||
self.predeclare_var_declarations(std::slice::from_ref(&ls.body), ctx);
|
||
}
|
||
Statement::WithStatement(ws) => {
|
||
self.predeclare_var_declarations(std::slice::from_ref(&ws.body), ctx);
|
||
}
|
||
_ => {}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// 预声明当前作用域直接子语句中的 `let`/`const`/`class` 绑定（未初始化，
|
||
/// 建立 TDZ 占位）。使声明点之前的读取在编译期可分辨为 TDZ 而非隐式全局，
|
||
/// 声明点复用预登记槽位。
|
||
///
|
||
/// # 边界与前提
|
||
/// - 只扫描直接子语句 + 递归 switch case（switch 不推 scope，case 内 lexical
|
||
/// 声明属于外层作用域）；不递归块/if/for/while body（嵌套块自预声明，
|
||
/// 单语句 body 不含 lexical 声明）。
|
||
/// - 跳过 for 头声明（循环作用域由 for 分支内联 declare）。
|
||
pub(crate) fn predeclare_lexical_declarations(&self, statements: &[Statement], ctx: &mut CompileCtx) {
|
||
for statement in statements {
|
||
match statement {
|
||
Statement::VariableDeclaration(decl) => {
|
||
if matches!(decl.kind, VariableDeclarationKind::Var) {
|
||
continue;
|
||
}
|
||
let is_const = matches!(decl.kind, VariableDeclarationKind::Const);
|
||
for d in &decl.declarations {
|
||
self.predeclare_lexical_pattern(&d.id, is_const, ctx);
|
||
}
|
||
}
|
||
Statement::ClassDeclaration(cd) => {
|
||
if let Some(id) = &cd.id {
|
||
let reg = ctx.alloc_reg();
|
||
let _ = ctx.declare_predeclared(id.name.as_str(), reg, VariableDeclarationKind::Const, true);
|
||
}
|
||
}
|
||
Statement::SwitchStatement(sw) => {
|
||
for case in &sw.cases {
|
||
for s in &case.consequent {
|
||
self.predeclare_lexical_stmt(s, ctx);
|
||
}
|
||
}
|
||
}
|
||
_ => {}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// 预声明单个语句中的 lexical 声明（供 switch case 递归；`let`/`const`/`class` 分支）。
|
||
fn predeclare_lexical_stmt(&self, stmt: &Statement, ctx: &mut CompileCtx) {
|
||
match stmt {
|
||
Statement::VariableDeclaration(decl) => {
|
||
if matches!(decl.kind, VariableDeclarationKind::Var) {
|
||
return;
|
||
}
|
||
let is_const = matches!(decl.kind, VariableDeclarationKind::Const);
|
||
for d in &decl.declarations {
|
||
self.predeclare_lexical_pattern(&d.id, is_const, ctx);
|
||
}
|
||
}
|
||
Statement::ClassDeclaration(cd) => {
|
||
if let Some(id) = &cd.id {
|
||
let reg = ctx.alloc_reg();
|
||
let _ = ctx.declare_predeclared(id.name.as_str(), reg, VariableDeclarationKind::Const, true);
|
||
}
|
||
}
|
||
_ => {}
|
||
}
|
||
}
|
||
|
||
/// 递归预声明绑定 pattern 内的全部标识符（含数组/对象/默认值解构）。
|
||
fn predeclare_lexical_pattern(&self, pattern: &BindingPattern, is_const: bool, ctx: &mut CompileCtx) {
|
||
match pattern {
|
||
BindingPattern::BindingIdentifier(bi) => {
|
||
let reg = ctx.alloc_reg();
|
||
let _ = ctx.declare_predeclared(
|
||
bi.name.as_str(),
|
||
reg,
|
||
if is_const {
|
||
VariableDeclarationKind::Const
|
||
} else {
|
||
VariableDeclarationKind::Let
|
||
},
|
||
is_const,
|
||
);
|
||
}
|
||
BindingPattern::ArrayPattern(ap) => {
|
||
for elem in &ap.elements {
|
||
if let Some(e) = elem {
|
||
self.predeclare_lexical_pattern(e, is_const, ctx);
|
||
}
|
||
}
|
||
if let Some(rest) = &ap.rest {
|
||
self.predeclare_lexical_pattern(&rest.argument, is_const, ctx);
|
||
}
|
||
}
|
||
BindingPattern::ObjectPattern(op) => {
|
||
for prop in &op.properties {
|
||
self.predeclare_lexical_pattern(&prop.value, is_const, ctx);
|
||
}
|
||
if let Some(rest) = &op.rest {
|
||
self.predeclare_lexical_pattern(&rest.argument, is_const, ctx);
|
||
}
|
||
}
|
||
BindingPattern::AssignmentPattern(ap) => {
|
||
self.predeclare_lexical_pattern(&ap.left, is_const, ctx);
|
||
}
|
||
}
|
||
}
|
||
}
|