is it possible using rust to generate jsx AST? - rust

Question

I'm not familiar with rust and trynna using swc to replace the babel
but I found #swc/core doesn't offer the api to generate code AST, so I want to write one using rust, is it possible to generate jsx ast?

Answer 1

Here is a good place to start: https://github.com/swc-project/swc/blob/main/crates/swc_ecma_parser/examples/typescript.rs
but link can get invalid so I also pasted the code:
use swc_common::{
self,
errors::{ColorConfig, Handler},
sync::Lrc,
FileName, SourceMap,
};
use swc_ecma_parser::{lexer::Lexer, Capturing, Parser, StringInput, Syntax};
fn main() {
let cm: Lrc<SourceMap> = Default::default();
let handler = Handler::with_tty_emitter(ColorConfig::Auto, true, false, Some(cm.clone()));
// Real usage
// let fm = cm
// .load_file(Path::new("test.js"))
// .expect("failed to load test.js");
let fm = cm.new_source_file(
FileName::Custom("test.js".into()),
"interface Foo {}".into(),
);
let lexer = Lexer::new(
Syntax::Typescript(Default::default()),
Default::default(),
StringInput::from(&*fm),
None,
);
let capturing = Capturing::new(lexer);
let mut parser = Parser::new_from(capturing);
for e in parser.take_errors() {
e.into_diagnostic(&handler).emit();
}
let _module = parser
.parse_typescript_module()
.map_err(|e| e.into_diagnostic(&handler).emit())
.expect("Failed to parse module.");
println!("Tokens: {:?}", parser.input().take());
}
I never really worked or cared about this. All it took was 5min of browsing the repository, all the resources are there but if you are new to rust, I recommend the rust book first.