Warning message when jsDocParsingMode is not hacked.

As TypeScript starts skipping parsing `JSDocComment`s since TypeScript v5.3 update but it is possible to revive the `JSDocComment`s' parsing, by hacking the `jsDocParsingMode` value of `tsc.js`, I've decided to print a warning message from `typia` when the `jsDocParsingMode` value is not hacked.

Therefore, it is possible to running the `typia` as before even when the `jsDocParsingMode` is not hacked, and user can ignore the warning message if he (or she) does not use any comment tags or not generating JSON schema with description comments.

- Related issue: microsoft/TypeScript#55739

Author: samchon

package.json

@@ -1,6 +1,6 @@
 {
   "name": "typia",
-  "version": "5.3.0-dev.20231120",
+  "version": "5.3.0-dev.20231122",
   "description": "Superfast runtime validators with only one line",
   "main": "lib/index.js",
   "typings": "lib/index.d.ts",
@@ -97,7 +97,7 @@
     "@types/nested-error-stacks": "^2.1.0",
     "@types/node": "^18.15.12",
     "@types/physical-cpu-count": "^2.0.0",
-    "@types/ts-expose-internals": "npm:[email protected].0-beta",
+    "@types/ts-expose-internals": "npm:[email protected].2",
     "@types/uuid": "^8.3.4",
     "@typescript-eslint/eslint-plugin": "^5.59.11",
     "@typescript-eslint/parser": "^5.59.11",

packages/typescript-json/package.json

@@ -1,6 +1,6 @@
 {
   "name": "typescript-json",
-  "version": "5.3.0-dev.20231120",
+  "version": "5.3.0-dev.20231122",
   "description": "Superfast runtime validators with only one line",
   "main": "lib/index.js",
   "typings": "lib/index.d.ts",
@@ -72,7 +72,7 @@
   },
   "homepage": "https://typia.io",
   "dependencies": {
-    "typia": "5.3.0-dev.20231120"
+    "typia": "5.3.0-dev.20231122"
   },
   "peerDependencies": {
     "typescript": ">=4.8.0 <5.3.0"

src/transformers/FileTransformer.ts

@@ -1,30 +1,38 @@
 import ts from "typescript";
 
+import { Singleton } from "../utils/Singleton";
+
 import { IProject } from "./IProject";
 import { NodeTransformer } from "./NodeTransformer";
 import { TransformerError } from "./TransformerError";
 
 export namespace FileTransformer {
   export const transform =
-    (project: Omit<IProject, "context">) =>
+    (environments: Omit<IProject, "context">) =>
     (context: ts.TransformationContext) =>
     (file: ts.SourceFile): ts.SourceFile => {
       if (file.isDeclarationFile) return file;
+
+      const project: IProject = {
+        ...environments,
+        context,
+      };
+      checkJsDocParsingMode.get(project, file);
+
       return ts.visitEachChild(
         file,
-        (node) => iterate_node({ ...project, context })(context)(node),
+        (node) => iterate_node(project)(node),
         context,
       );
     };
 
   const iterate_node =
     (project: IProject) =>
-    (context: ts.TransformationContext) =>
     (node: ts.Node): ts.Node =>
       ts.visitEachChild(
         try_transform_node(project)(node) ?? node,
-        (child) => iterate_node(project)(context)(child),
-        context,
+        (child) => iterate_node(project)(child),
+        project.context,
       );
 
   const try_transform_node =
@@ -55,3 +63,29 @@ const isTransformerError = (error: any): error is TransformerError =>
   error.constructor.name === "TransformerError" &&
   typeof error.code === "string" &&
   typeof error.message === "string";
+
+const checkJsDocParsingMode = new Singleton(
+  (project: IProject, file: ts.SourceFile) => {
+    if (
+      typeof file.jsDocParsingMode === "number" &&
+      file.jsDocParsingMode !== 0
+    ) {
+      project.extras.addDiagnostic(
+        ts.createDiagnosticForNode(file, {
+          code: `(typia setup)` as any,
+          key: "jsDocParsingMode",
+          category: ts.DiagnosticCategory.Warning,
+          message: [
+            `Run "npx typia setup" or "npx ts-patch install" command again.`,
+            ``,
+            `Since TypeScript v5.3 update, "tsc" no more parses JSDoc comments. Therefore, "typia" also cannot utilize those JSDoc comments, and it would damage some features of "typia" like "comment tags" or "JSON schema" generator.`,
+            ``,
+            `To solve this problem, run "npx typia setup" or "ts-patch install" command again to hack the TypeScript compiler to revive the JSDoc parsing.`,
+            ``,
+            `  - reference: https://github.com/microsoft/TypeScript/pull/55739`,
+          ].join("\n"),
+        }),
+      );
+    }
+  },
+);