mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-23 18:21:13 +08:00
71 lines
3.1 KiB
Rust
71 lines
3.1 KiB
Rust
//! TDZ 错误消息绑定名钉：运行时 cell 的四个 TDZ 抛点（own cell 读/写、upvalue
|
||
//! 读/写）消息须携带被访问绑定名（`Cannot access 'x' before initialization`，
|
||
//! 与 node 口径一致）；取不到名时回退通用文本。每站点各钉一例：闭包读未初始化
|
||
//! 捕获 let（LOAD_UPVALUE）、闭包写未初始化捕获 let（STORE_UPVALUE）、同函数块级
|
||
//! let 声明前读（CELL_GET）、同函数块级 let 声明前写（CELL_SET）。
|
||
//!
|
||
//! 块级 let 用例的被捕获绑定须被嵌套闭包引用（捕获名跳过静态 TDZ 守卫、留运行时
|
||
//! 判定），故源例均含一个引用该绑定的嵌套闭包。顶层直读（无函数对象）取不到名，
|
||
//! 回退通用文本，属已知残面，单独钉住。
|
||
|
||
use std::sync::Arc;
|
||
|
||
use oxide_compiler::compiler::Compiler;
|
||
use oxide_vm::vm::Vm;
|
||
|
||
fn eval(source: &str) -> Result<oxide_types::value::JsValue, String> {
|
||
let allocator = oxide_parser::Allocator::default();
|
||
let program = oxide_parser::parse(&allocator, source).map_err(|e| format!("parse error: {}", e[0].message))?;
|
||
let module = Compiler::new().compile(&program).map_err(|e| format!("compile error: {e}"))?;
|
||
let mut vm = Vm::new();
|
||
vm.run(&Arc::new(module))
|
||
}
|
||
|
||
/// 断言程序抛错且未捕获错误消息含带名 TDZ 形态。
|
||
fn assert_tdz_message(source: &str, binding: &str) {
|
||
let err = match eval(source) {
|
||
Ok(v) => panic!("expected a TDZ throw, got completion value {v:?}\nsource: {source}"),
|
||
Err(e) => e,
|
||
};
|
||
let expected = format!("Cannot access '{binding}' before initialization");
|
||
assert!(err.contains(&expected), "expected {expected} in: {err}\nsource: {source}");
|
||
}
|
||
|
||
#[test]
|
||
fn tdz_upvalue_read_message_carries_binding_name() {
|
||
// 闭包读未初始化捕获 let（LOAD_UPVALUE 站点）：消息带绑定名。
|
||
assert_tdz_message("function f() { return x; } f(); let x = 1", "x");
|
||
}
|
||
|
||
#[test]
|
||
fn tdz_upvalue_write_message_carries_binding_name() {
|
||
// 闭包写未初始化捕获 let（STORE_UPVALUE 站点）：消息带绑定名。
|
||
assert_tdz_message("function f() { x = 1; } f(); let x = 1", "x");
|
||
}
|
||
|
||
#[test]
|
||
fn tdz_cell_read_message_carries_binding_name() {
|
||
// 同函数块级 let 声明前读（CELL_GET 站点）：绑定被块内闭包捕获，静态守卫
|
||
// 跳过，声明前读经运行时 cell 抛带名 TDZ。
|
||
assert_tdz_message("function f() { const g = () => x; return x; let x; } f()", "x");
|
||
}
|
||
|
||
#[test]
|
||
fn tdz_cell_write_message_carries_binding_name() {
|
||
// 同函数块级 let 声明前写（CELL_SET 站点）：同读例的捕获形态。
|
||
assert_tdz_message("function f() { const g = () => x; x = 1; let x; } f()", "x");
|
||
}
|
||
|
||
#[test]
|
||
fn tdz_top_level_read_falls_back_to_generic_message() {
|
||
// 顶层直读（无函数对象）取不到绑定名：回退通用文本（已知残面钉）。
|
||
let err = match eval("function f() { return x; } x; let x = 1") {
|
||
Ok(v) => panic!("expected a TDZ throw, got completion value {v:?}"),
|
||
Err(e) => e,
|
||
};
|
||
assert!(
|
||
err.contains("Cannot access variable before initialization"),
|
||
"expected generic TDZ message in: {err}"
|
||
);
|
||
}
|