From e45a719cd09ad08a5b08ee3b195579c754bba936 Mon Sep 17 00:00:00 2001
From: Jeff Williams <jeffrey.l.williams@gmail.com>
Date: Sun, 16 Jul 2017 18:21:19 -0700
Subject: [PATCH] support the `implicitCast` tag (Closure Compiler only) (#605)

---
 lib/jsdoc/tag/dictionary/definitions.js |  4 +++
 test/fixtures/implicitcasttag.js        |  7 +++++
 test/specs/tags/implicitcasttag.js      | 42 +++++++++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 test/fixtures/implicitcasttag.js
 create mode 100644 test/specs/tags/implicitcasttag.js

diff --git a/lib/jsdoc/tag/dictionary/definitions.js b/lib/jsdoc/tag/dictionary/definitions.js
index d52bc434..39a66dd2 100644
--- a/lib/jsdoc/tag/dictionary/definitions.js
+++ b/lib/jsdoc/tag/dictionary/definitions.js
@@ -882,6 +882,10 @@ exports.closureTags = {
     },
     final: cloneTagDef(baseTags.readonly),
     implements: cloneTagDef(baseTags.implements),
+    // Closure Compiler only
+    implicitcast: {
+        onTagged: ignore
+    },
     inheritdoc: cloneTagDef(baseTags.inheritdoc),
     interface: cloneTagDef(baseTags.interface, {
         canHaveName: false,
diff --git a/test/fixtures/implicitcasttag.js b/test/fixtures/implicitcasttag.js
new file mode 100644
index 00000000..3bd8b8df
--- /dev/null
+++ b/test/fixtures/implicitcasttag.js
@@ -0,0 +1,7 @@
+function Foo() {}
+
+/**
+ * @type {string}
+ * @implicitCast
+ */
+Foo.prototype.bar;
diff --git a/test/specs/tags/implicitcasttag.js b/test/specs/tags/implicitcasttag.js
new file mode 100644
index 00000000..7b8d2bbd
--- /dev/null
+++ b/test/specs/tags/implicitcasttag.js
@@ -0,0 +1,42 @@
+'use strict';
+
+describe('@implicitCast tag', function() {
+    var env = require('jsdoc/env');
+    var logger = require('jsdoc/util/logger');
+
+    var allowUnknownTags = Boolean(env.conf.tags.allowUnknownTags);
+
+    beforeEach(function() {
+        env.conf.tags.allowUnknownTags = false;
+        spyOn(logger, 'error');
+    });
+
+    afterEach(function() {
+        jasmine.restoreTagDictionary();
+        env.conf.tags.allowUnknownTags = allowUnknownTags;
+    });
+
+    describe('JSDoc tags', function() {
+        beforeEach(function() {
+            jasmine.replaceTagDictionary('jsdoc');
+        });
+
+        it('should not recognize the @implicitCast tag', function() {
+            jasmine.getDocSetFromFile('test/fixtures/implicitcasttag.js');
+
+            expect(logger.error).toHaveBeenCalled();
+        });
+    });
+
+    describe('Closure Compiler tags', function() {
+        beforeEach(function() {
+            jasmine.replaceTagDictionary('closure');
+        });
+
+        it('should recognize the @implicitCast tag', function() {
+            jasmine.getDocSetFromFile('test/fixtures/implicitcasttag.js');
+
+            expect(logger.error).not.toHaveBeenCalled();
+        });
+    });
+});