Improve @throws {@link CustomError} handling

Author: Andarist

src/compiler/parser.ts

@@ -9444,15 +9444,13 @@ namespace Parser {
             }
 
             function parseSeeTag(start: number, tagName: Identifier, indent?: number, indentText?: string): JSDocSeeTag {
-                const isMarkdownOrJSDocLink = token() === SyntaxKind.OpenBracketToken
-                    || lookAhead(() => nextTokenJSDoc() === SyntaxKind.AtToken && tokenIsIdentifierOrKeyword(nextTokenJSDoc()) && isJSDocLinkTag(scanner.getTokenValue()));
-                const nameExpression = isMarkdownOrJSDocLink ? undefined : parseJSDocNameReference();
+                const nameExpression = isMarkdownOrJSDocLink() ? undefined : parseJSDocNameReference();
                 const comments = indent !== undefined && indentText !== undefined ? parseTrailingTagComments(start, getNodePos(), indent, indentText) : undefined;
                 return finishNode(factory.createJSDocSeeTag(tagName, nameExpression, comments), start);
             }
 
             function parseThrowsTag(start: number, tagName: Identifier, indent: number, indentText: string): JSDocThrowsTag {
-                const typeExpression = tryParseTypeExpression();
+                const typeExpression = isMarkdownOrJSDocLink() ? undefined : tryParseTypeExpression();
                 const comment = parseTrailingTagComments(start, getNodePos(), indent, indentText);
                 return finishNode(factory.createJSDocThrowsTag(tagName, typeExpression, comment), start);
             }
@@ -9881,6 +9879,10 @@ namespace Parser {
                 nextTokenJSDoc();
                 return result;
             }
+
+            function isMarkdownOrJSDocLink() {
+                return token() === SyntaxKind.OpenBracketToken || lookAhead(() => nextTokenJSDoc() === SyntaxKind.AtToken && tokenIsIdentifierOrKeyword(nextTokenJSDoc()) && isJSDocLinkTag(scanner.getTokenValue()));
+            }
         }
     }
 }

tests/baselines/reference/jsdocLink7.baseline

@@ -0,0 +1,119 @@
+// === QuickInfo ===
+=== /tests/cases/fourslash/jsdocLink7.ts ===
+// type Book = any;
+// 
+// class IsbnSyntaxError extends Error {}
+// 
+// /**
+//  * @throws {@link IsbnSyntaxError}
+//  * This exception is thrown if the input is not a valid ISBN number.
+//  */
+// function fetchBookByIsbn(isbnCode: string): Book {}
+//          ^^^^^^^^^^^^^^^
+// | ----------------------------------------------------------------------
+// | function fetchBookByIsbn(isbnCode: string): Book
+// | @throws {@link IsbnSyntaxError}This exception is thrown if the input is not a valid ISBN number.
+// | ----------------------------------------------------------------------
+
+[
+  {
+    "marker": {
+      "fileName": "/tests/cases/fourslash/jsdocLink7.ts",
+      "position": 194,
+      "name": ""
+    },
+    "item": {
+      "kind": "function",
+      "kindModifiers": "",
+      "textSpan": {
+        "start": 179,
+        "length": 15
+      },
+      "displayParts": [
+        {
+          "text": "function",
+          "kind": "keyword"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "fetchBookByIsbn",
+          "kind": "functionName"
+        },
+        {
+          "text": "(",
+          "kind": "punctuation"
+        },
+        {
+          "text": "isbnCode",
+          "kind": "parameterName"
+        },
+        {
+          "text": ":",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "string",
+          "kind": "keyword"
+        },
+        {
+          "text": ")",
+          "kind": "punctuation"
+        },
+        {
+          "text": ":",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "Book",
+          "kind": "aliasName"
+        }
+      ],
+      "documentation": [],
+      "tags": [
+        {
+          "name": "throws",
+          "text": [
+            {
+              "text": "",
+              "kind": "text"
+            },
+            {
+              "text": "{@link ",
+              "kind": "link"
+            },
+            {
+              "text": "IsbnSyntaxError",
+              "kind": "linkName",
+              "target": {
+                "fileName": "/tests/cases/fourslash/jsdocLink7.ts",
+                "textSpan": {
+                  "start": 18,
+                  "length": 38
+                }
+              }
+            },
+            {
+              "text": "}",
+              "kind": "link"
+            },
+            {
+              "text": "This exception is thrown if the input is not a valid ISBN number.",
+              "kind": "text"
+            }
+          ]
+        }
+      ]
+    }
+  }
+]

tests/cases/fourslash/jsdocLink7.ts

@@ -0,0 +1,15 @@
+/// <reference path='fourslash.ts' />
+
+// https://github.com/microsoft/TypeScript/issues/58599
+
+//// type Book = any;
+////
+//// class IsbnSyntaxError extends Error {}
+////
+//// /**
+////  * @throws {@link IsbnSyntaxError}
+////  * This exception is thrown if the input is not a valid ISBN number.
+////  */
+//// function fetchBookByIsbn/**/(isbnCode: string): Book {}
+
+verify.baselineQuickInfo();