Treat template literal tag as IIFE (#18541)

src/language-js/comments/will-print-own-comments.js

@@ -1,7 +1,7 @@
 import {
   createTypeCheckFunction,
   hasNodeIgnoreComment,
-  isIifeCallee,
+  isIifeCalleeOrTaggedTemplateExpressionTag,
   isJsxElement,
   isUnionType,
   shouldUnionTypePrintOwnComments,
@@ -40,7 +40,7 @@ function willPrintOwnComments(path) {
       isClassOrInterface(parent)) ||
     // Not tested, don't know how to
     (key === "patterns" && parent.type === "MatchOrPattern") ||
-    isIifeCallee(path)
+    isIifeCalleeOrTaggedTemplateExpressionTag(path)
   ) {
     return true;
   }

src/language-js/print/index.js

@@ -14,7 +14,7 @@ import {
   CommentCheckFlags,
   createTypeCheckFunction,
   hasComment,
-  isIifeCallee,
+  isIifeCalleeOrTaggedTemplateExpressionTag,
 } from "../utilities/index.js";
 import isIgnored from "../utilities/is-ignored.js";
 import { printAngular } from "./angular.js";
@@ -85,7 +85,7 @@ function print(path, options, print, args) {
     return doc;
   }
 
-  doc = printCommentsForIifeCallee(path, options, doc);
+  doc = printCommentsForFunction(path, options, doc);
 
   const hasDecorators = isNonEmptyArray(node.decorators);
   const decoratorsDoc = printDecorators(path, options, print);
@@ -112,13 +112,13 @@ function print(path, options, print, args) {
   ]);
 }
 
-function printCommentsForIifeCallee(path, options, doc) {
+function printCommentsForFunction(path, options, doc) {
   const { node } = path;
 
   if (
     (hasComment(node, CommentCheckFlags.Leading) ||
       hasComment(node, CommentCheckFlags.Trailing)) &&
-    isIifeCallee(path)
+    isIifeCalleeOrTaggedTemplateExpressionTag(path)
   ) {
     return [indent([softline, printComments(path, doc, options)]), softline];
   }

src/language-js/utilities/index.js

@@ -1103,13 +1103,13 @@ function isShorthandSpecifier(specifier) {
   }
 }
 
-function isIifeCallee(path) {
+function isIifeCalleeOrTaggedTemplateExpressionTag(path) {
   const { node } = path;
   return (
     (node.type === "FunctionExpression" ||
       node.type === "ArrowFunctionExpression") &&
-    path.key === "callee" &&
-    isCallExpression(path.parent)
+    ((path.key === "callee" && isCallExpression(path.parent)) ||
+      (path.key === "tag" && path.parent.type === "TaggedTemplateExpression"))
   );
 }
 
@@ -1142,7 +1142,7 @@ export {
   isFlowObjectTypePropertyAFunction,
   isFunctionCompositionArgs,
   isFunctionOrArrowExpression,
-  isIifeCallee,
+  isIifeCalleeOrTaggedTemplateExpressionTag,
   isIntersectionType,
   isJsxElement,
   isLiteral,