feat: support concurrent diagnostics

Author: spence

Cargo.lock

@@ -29,6 +29,7 @@ typescript = ["transforms", "swc_ecma_transforms_typescript"]
 utils = ["swc_ecma_utils"]
 view = ["dprint-swc-ext/view"]
 visit = ["swc_ecma_visit", "swc_visit", "swc_visit_macros", "swc_macros_common"]
+concurrent = ["swc_common/concurrent"]
 
 [dependencies]
 anyhow = { version = "1.0.64", optional = true }

Cargo.toml

@@ -1,9 +1,8 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
-use std::rc::Rc;
-
 use crate::swc::common::FileName;
 use crate::swc::common::SourceFile;
+use swc_common::sync::Lrc;
 
 use crate::ModuleSpecifier;
 
@@ -31,7 +30,7 @@ impl IntoSwcFileName for &str {
 
 #[derive(Clone, Default)]
 pub struct SourceMap {
-  inner: Rc<crate::swc::common::SourceMap>,
+  inner: Lrc<crate::swc::common::SourceMap>,
 }
 
 impl SourceMap {
@@ -43,15 +42,15 @@ impl SourceMap {
     map
   }
 
-  pub fn inner(&self) -> &Rc<crate::swc::common::SourceMap> {
+  pub fn inner(&self) -> &Lrc<crate::swc::common::SourceMap> {
     &self.inner
   }
 
   pub fn new_source_file(
     &self,
     file_name: impl IntoSwcFileName,
     source: String,
-  ) -> Rc<SourceFile> {
+  ) -> Lrc<SourceFile> {
     self
       .inner
       .new_source_file(file_name.into_file_name(), source)

src/source_map.rs

@@ -1,7 +1,7 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
-use std::rc::Rc;
 use std::sync::Arc;
+use swc_common::sync::{Lrc, Send, Sync};
 
 use anyhow::Result;
 use swc_ecma_visit::as_folder;
@@ -308,9 +308,12 @@ fn transpile(
 
 #[derive(Default, Clone)]
 struct DiagnosticCollector {
-  diagnostics_cell: Rc<RefCell<Vec<SwcDiagnostic>>>,
+  diagnostics_cell: Lrc<RefCell<Vec<SwcDiagnostic>>>,
 }
 
+unsafe impl Send for DiagnosticCollector {}
+unsafe impl Sync for DiagnosticCollector {}
+
 impl DiagnosticCollector {
   pub fn into_handler(self) -> crate::swc::common::errors::Handler {
     crate::swc::common::errors::Handler::with_emitter(