pierrelf.com
we (web engine): Experimental web browser project to understand the limits of Claude
1//! JavaScript engine — lexer, parser, bytecode, register VM, GC, JIT (AArch64).
2
3pub mod ast;
4pub mod bytecode;
5pub mod compiler;
6pub mod lexer;
7pub mod parser;
8
9use std::fmt;
10
11/// An error produced by the JavaScript engine.
12#[derive(Debug)]
13pub enum JsError {
14 /// The engine does not yet support this feature or syntax.
15 NotImplemented,
16 /// A parse/syntax error in the source.
17 SyntaxError(String),
18 /// A runtime error during execution.
19 RuntimeError(String),
20}
21
22impl fmt::Display for JsError {
23 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
24 match self {
25 JsError::NotImplemented => write!(f, "not implemented"),
26 JsError::SyntaxError(msg) => write!(f, "SyntaxError: {}", msg),
27 JsError::RuntimeError(msg) => write!(f, "RuntimeError: {}", msg),
28 }
29 }
30}
31
32/// Evaluate a JavaScript source string and return the completion value.
33///
34/// This is a stub that always returns `NotImplemented`. The real
35/// implementation will lex, parse, compile to bytecode, and execute.
36pub fn evaluate(_source: &str) -> Result<(), JsError> {
37 Err(JsError::NotImplemented)
38}