es2019 parser

Features

Heavily tested

Passes almost all tests from tc39/test262.

Error reporting

error: 'implements', 'interface', 'let', 'package', 'private', 'protected',  'public', 'static', or 'yield' cannot be used as an identifier in strict mode
--> invalid.js:3:10
|
3 | function yield() {
|          ^^^^^

Example (lexer)

See lexer.rs in examples directory.

Example (parser)

#[macro_use]
extern crate swc_common;
extern crate swc_ecma_parser;
use std::sync::Arc;
use swc_common::{
errors::{ColorConfig, Handler},
FileName, FilePathMapping, SourceMap,
};
use swc_ecma_parser::{lexer::Lexer, Parser, Session, SourceFileInput, Syntax};

fn main() {
swc_common::GLOBALS.set(&swc_common::Globals::new(), || {
let cm: Arc<SourceMap> = Default::default();
let handler =
Handler::with_tty_emitter(ColorConfig::Auto, true, false, Some(cm.clone()));

let session = Session { handler: &handler };

// 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()),
"function foo() {}".into(),
);
let lexer = Lexer::new(
session,
Syntax::Es(Default::default()),
SourceFileInput::from(&*fm),
None,
);

let mut parser = Parser::new_from(session, lexer);


let _module = parser
.parse_module()
.map_err(|mut e| {
e.emit();
()
})
.expect("failed to parser module");
});
}