feat(common): Add an utiliy method for comments (#2002)

swc_common:
 - Add `SingleThreadedComments::from_leading_and_trailing`.

common/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2018"
 license = "Apache-2.0/MIT"
 name = "swc_common"
 repository = "https://github.com/swc-project/swc.git"
-version = "0.11.3"
+version = "0.11.4"
 
 [features]
 concurrent = ["parking_lot"]

common/src/comments.rs

@@ -230,6 +230,15 @@ impl Comments for SingleThreadedComments {
 }
 
 impl SingleThreadedComments {
+    /// Creates a new `SingleThreadedComments` from the provided leading and
+    /// trailing.
+    pub fn from_leading_and_trailing(
+        leading: SingleThreadedCommentsMap,
+        trailing: SingleThreadedCommentsMap,
+    ) -> Self {
+        SingleThreadedComments { leading, trailing }
+    }
+
     /// Takes all the comments as (leading, trailing).
     pub fn take_all(self) -> (SingleThreadedCommentsMap, SingleThreadedCommentsMap) {
         (self.leading, self.trailing)