have a try on arc source (#44)

src/cached_source.rs

@@ -14,15 +14,16 @@ use crate::{helpers::StreamChunks, MapOptions, Source, SourceMap};
 /// ```
 /// use rspack_sources::{
 ///   BoxSource, CachedSource, ConcatSource, MapOptions, OriginalSource,
-///   RawSource, Source, SourceMap,
+///   RawSource, Source, SourceExt, SourceMap,
 /// };
 ///
 /// let mut concat = ConcatSource::new([
-///   Box::new(RawSource::from("Hello World\n".to_string())) as BoxSource,
-///   Box::new(OriginalSource::new(
+///   RawSource::from("Hello World\n".to_string()).boxed(),
+///   OriginalSource::new(
 ///     "console.log('test');\nconsole.log('test2');\n",
 ///     "console.js",
-///   )),
+///   )
+///   .boxed(),
 /// ]);
 /// concat.add(OriginalSource::new("Hello2\n", "hello.md"));
 ///

src/concat_source.rs

@@ -19,15 +19,16 @@ use crate::{
 /// ```
 /// use rspack_sources::{
 ///   BoxSource, ConcatSource, MapOptions, OriginalSource, RawSource, Source,
-///   SourceMap,
+///   SourceExt, SourceMap,
 /// };
 ///
 /// let mut source = ConcatSource::new([
-///   Box::new(RawSource::from("Hello World\n".to_string())) as BoxSource,
-///   Box::new(OriginalSource::new(
+///   RawSource::from("Hello World\n".to_string()).boxed(),
+///   OriginalSource::new(
 ///     "console.log('test');\nconsole.log('test2');\n",
 ///     "console.js",
-///   )),
+///   )
+///   .boxed(),
 /// ]);
 /// source.add(OriginalSource::new("Hello2\n", "hello.md"));
 ///
@@ -279,11 +280,12 @@ mod tests {
   #[test]
   fn should_concat_two_sources() {
     let mut source = ConcatSource::new([
-      Box::new(RawSource::from("Hello World\n".to_string())) as BoxSource,
-      Box::new(OriginalSource::new(
+      RawSource::from("Hello World\n".to_string()).boxed(),
+      OriginalSource::new(
         "console.log('test');\nconsole.log('test2');\n",
         "console.js",
-      )),
+      )
+      .boxed(),
     ]);
     source.add(OriginalSource::new("Hello2\n", "hello.md"));
 
@@ -328,11 +330,12 @@ mod tests {
   #[test]
   fn should_be_able_to_handle_strings_for_all_methods() {
     let mut source = ConcatSource::new([
-      Box::new(RawSource::from("Hello World\n".to_string())) as BoxSource,
-      Box::new(OriginalSource::new(
+      RawSource::from("Hello World\n".to_string()).boxed(),
+      OriginalSource::new(
         "console.log('test');\nconsole.log('test2');\n",
         "console.js",
-      )),
+      )
+      .boxed(),
     ]);
     let inner_source =
       ConcatSource::new([RawSource::from("("), "'string'".into(), ")".into()]);
@@ -382,14 +385,14 @@ mod tests {
   #[test]
   fn should_allow_to_concatenate_in_a_single_line() {
     let source = ConcatSource::new([
-      Box::new(OriginalSource::new("Hello", "hello.txt")) as BoxSource,
-      Box::new(RawSource::from(" ")),
-      Box::new(OriginalSource::new("World ", "world.txt")),
-      Box::new(RawSource::from("is here\n")),
-      Box::new(OriginalSource::new("Hello\n", "hello.txt")),
-      Box::new(RawSource::from(" \n")),
-      Box::new(OriginalSource::new("World\n", "world.txt")),
-      Box::new(RawSource::from("is here")),
+      OriginalSource::new("Hello", "hello.txt").boxed(),
+      RawSource::from(" ").boxed(),
+      OriginalSource::new("World ", "world.txt").boxed(),
+      RawSource::from("is here\n").boxed(),
+      OriginalSource::new("Hello\n", "hello.txt").boxed(),
+      RawSource::from(" \n").boxed(),
+      OriginalSource::new("World\n", "world.txt").boxed(),
+      RawSource::from("is here").boxed(),
     ]);
 
     assert_eq!(

src/source.rs

@@ -4,6 +4,7 @@ use std::{
   convert::{TryFrom, TryInto},
   fmt,
   hash::{Hash, Hasher},
+  sync::Arc,
 };
 
 use dyn_clone::DynClone;
@@ -15,7 +16,7 @@ use crate::{
 };
 
 /// An alias for [Box<dyn Source>].
-pub type BoxSource = Box<dyn Source>;
+pub type BoxSource = Arc<dyn Source>;
 
 /// [Source] abstraction, [webpack-sources docs](https://github.com/webpack/webpack-sources/#source).
 pub trait Source:
@@ -42,7 +43,7 @@ pub trait Source:
   fn to_writer(&self, writer: &mut dyn std::io::Write) -> std::io::Result<()>;
 }
 
-impl Source for Box<dyn Source> {
+impl Source for BoxSource {
   fn source(&self) -> Cow<str> {
     self.as_ref().source()
   }
@@ -66,7 +67,7 @@ impl Source for Box<dyn Source> {
 
 dyn_clone::clone_trait_object!(Source);
 
-impl StreamChunks for Box<dyn Source> {
+impl StreamChunks for BoxSource {
   fn stream_chunks(
     &self,
     options: &MapOptions,
@@ -137,7 +138,7 @@ pub trait SourceExt {
 
 impl<T: Source + 'static> SourceExt for T {
   fn boxed(self) -> BoxSource {
-    Box::new(self)
+    Arc::new(self)
   }
 }
 

src/source_map_source.rs

@@ -171,8 +171,7 @@ impl StreamChunks for SourceMapSource {
 #[cfg(test)]
 mod tests {
   use crate::{
-    BoxSource, ConcatSource, OriginalSource, RawSource, ReplaceSource,
-    SourceExt,
+    ConcatSource, OriginalSource, RawSource, ReplaceSource, SourceExt,
   };
 
   use super::*;
@@ -181,10 +180,9 @@ mod tests {
   fn map_correctly() {
     let inner_source_code = "Hello World\nis a test string\n";
     let inner_source = ConcatSource::new([
-      Box::new(OriginalSource::new(inner_source_code, "hello-world.txt"))
-        as BoxSource,
-      Box::new(OriginalSource::new("Translate: ", "header.txt")),
-      Box::new(RawSource::from("Other text")),
+      OriginalSource::new(inner_source_code, "hello-world.txt").boxed(),
+      OriginalSource::new("Translate: ", "header.txt").boxed(),
+      RawSource::from("Other text").boxed(),
     ]);
     let source_r_code =
       "Translated: Hallo Welt\nist ein test Text\nAnderer Text";