feat: $comment keyword (#604)

api.md

@@ -492,6 +492,21 @@ interface MyObject {
 ```
 
 
+## [comments-comment](./test/programs/comments-comment)
+
+```ts
+/**
+ * @$comment Object comment
+ */
+interface MyObject {
+  /**
+   * @$comment Property comment
+   */
+  text: string;
+}
+```
+
+
 ## [comments-from-lib](./test/programs/comments-from-lib)
 
 ```ts
@@ -607,6 +622,15 @@ export interface MyObject {
 ```
 
 
+## [const-as-enum](./test/programs/const-as-enum)
+
+```ts
+export interface MyObject {
+    reference: true;
+}
+```
+
+
 ## [const-keyword](./test/programs/const-keyword)
 
 ```ts

test/programs/comments-comment/main.ts

@@ -0,0 +1,9 @@
+/**
+ * @$comment Object comment
+ */
+interface MyObject {
+  /**
+   * @$comment Property comment
+   */
+  text: string;
+}

test/programs/comments-comment/schema.json

@@ -0,0 +1,16 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "additionalProperties": false,
+    "$comment": "Object comment",
+    "properties": {
+        "text": {
+            "$comment": "Property comment",
+            "type": "string"
+        }
+    },
+    "required": [
+        "text"
+    ],
+    "type": "object"
+}
+

test/schema.test.ts

@@ -371,6 +371,7 @@ describe("schema", () => {
 
     describe("comments", () => {
         assertSchema("comments", "MyObject");
+        assertSchema("comments-comment", "MyObject");
         assertSchema("comments-override", "MyObject");
         assertSchema("comments-imports", "MyObject", {
             aliasRef: true,

typescript-json-schema.ts

@@ -426,6 +426,7 @@ const validationKeywords = {
     $ref: true,
     id: true,
     $id: true,
+    $comment: true,
     title: true
 };