diff --git a/README.md b/README.md
index 982210b3..c68f5233 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,8 @@ potentially very difficult to debug due to dissimilar or unsupported package ver
     - [Composer Plugins](docs/limitations.md#composer-plugins)
     - [PSR-0 Partial support](docs/limitations.md#psr-0-partial-support)
     - [Files autoloading](docs/limitations.md#files-autoloading)
+    - [Exposing/Excluding traits](docs/limitations.md#exposingexcluding-traits)
+    - [Exposing/Excluding enums](docs/limitations.md#exposingexcluding-enums)
 - [Contributing](#contributing)
 - [Credits](#credits)
 
diff --git a/docs/limitations.md b/docs/limitations.md
index d5fd2034..efc43417 100644
--- a/docs/limitations.md
+++ b/docs/limitations.md
@@ -10,6 +10,8 @@
 - [Composer Plugins](#composer-plugins)
 - [PSR-0 Partial support](#psr-0-partial-support)
 - [Files autoloading](#files-autoloading)
+- [Exposing/Excluding traits](#exposingexcluding-traits)
+- [Exposing/Excluding enums](#exposingexcluding-enums)
 
 
 ### Dynamic symbols
@@ -240,6 +242,19 @@ the scoped file and non-scoped file will have the same hash resulting in errors.
 This is a limitation that should be fixable, check [#298] for the progress.
 
 
+### Exposing/Excluding traits
+
+There is currently no way to expose or exclude a trait. Since there is no
+aliasing mechanism for traits, it could be still possible by declaring a trait
+that extends the scoped trait, but this is currently not implemented.
+
+
+### Exposing/Excluding enums
+
+There is currently no way to expose or exclude an enum. The problem being there
+is no way to alias one.
+
+
 <br />
 <hr />
 
diff --git a/specs/enum/declaration.php b/specs/enum/declaration.php
new file mode 100644
index 00000000..eca35693
--- /dev/null
+++ b/specs/enum/declaration.php
@@ -0,0 +1,213 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the humbug/php-scoper package.
+ *
+ * Copyright (c) 2017 Théo FIDRY <theo.fidry@gmail.com>,
+ *                    Pádraic Brady <padraic.brady@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+return [
+    'meta' => [
+        'title' => 'Enum declaration',
+        // Default values. If not specified will be the one used
+        'prefix' => 'Humbug',
+
+        'expose-global-constants' => false,
+        'expose-global-classes' => false,
+        'expose-global-functions' => false,
+        'expose-namespaces' => [],
+        'expose-constants' => [],
+        'expose-classes' => [],
+        'expose-functions' => [],
+
+        'exclude-namespaces' => [],
+        'exclude-constants' => [],
+        'exclude-classes' => [],
+        'exclude-functions' => [],
+
+        'expected-recorded-classes' => [],
+        'expected-recorded-functions' => [],
+    ],
+
+    'minimal enum declaration' => <<<'PHP'
+    <?php
+    
+    enum Status {
+        case DRAFT;
+        case PUBLISHED;
+        case ARCHIVED;
+    }
+    
+    ----
+    <?php
+    
+    namespace Humbug;
+
+    enum Status
+    {
+        case DRAFT;
+        case PUBLISHED;
+        case ARCHIVED;
+    }
+    
+    PHP,
+
+    'enum with methods' => <<<'PHP'
+    <?php
+    
+    enum Status {
+        case DRAFT;
+        case PUBLISHED;
+        case ARCHIVED;
+        
+        public function color(): string {
+            return match($this) {
+                Status::DRAFT => 'grey',   
+                Status::PUBLISHED => 'green',   
+                self::ARCHIVED => 'red',   
+            };
+        }
+    }
+    
+    ----
+    <?php
+    
+    namespace Humbug;
+
+    enum Status
+    {
+        case DRAFT;
+        case PUBLISHED;
+        case ARCHIVED;
+        public function color() : string
+        {
+            return match ($this) {
+                Status::DRAFT => 'grey',
+                Status::PUBLISHED => 'green',
+                self::ARCHIVED => 'red',
+            };
+        }
+    }
+    
+    PHP,
+
+    'enum with interface' => <<<'PHP'
+    <?php
+    
+    enum Status implements HasColor {
+        case DRAFT = 'draft';
+        case PUBLISHED = 'published';
+        case ARCHIVED = 'archived';
+    }
+    
+    ----
+    <?php
+    
+    namespace Humbug;
+
+    enum Status implements \HasColor
+    {
+        case DRAFT = 'draft';
+        case PUBLISHED = 'published';
+        case ARCHIVED = 'archived';
+    }
+    
+    PHP,
+
+    'class with Enum name' => <<<'PHP'
+    <?php
+    
+    class Enum {}
+    
+    ----
+    <?php
+    
+    namespace Humbug;
+
+    class Enum
+    {
+    }
+    
+    PHP,
+
+    'backed enum' => <<<'PHP'
+    <?php
+    
+    enum Status: string {
+        case DRAFT = 'draft';
+        case PUBLISHED = 'published';
+        case ARCHIVED = 'archived';
+    }
+    
+    ----
+    <?php
+    
+    namespace Humbug;
+
+    enum Status : string
+    {
+        case DRAFT = 'draft';
+        case PUBLISHED = 'published';
+        case ARCHIVED = 'archived';
+    }
+
+    PHP,
+
+    'excluded enum (doesn\'t work)' => [
+        'exclude-classes' => ['Status'],
+        'payload' => <<<'PHP'
+            <?php
+            
+            enum Status {
+                case DRAFT;
+                case PUBLISHED;
+                case ARCHIVED;
+            }
+            
+            ----
+            <?php
+            
+            namespace Humbug;
+
+            enum Status
+            {
+                case DRAFT;
+                case PUBLISHED;
+                case ARCHIVED;
+            }
+            
+            PHP
+    ],
+
+    'exposed enum (doesn\'t work)' => [
+        'expose-classes' => ['Status'],
+        'payload' => <<<'PHP'
+            <?php
+            
+            enum Status {
+                case DRAFT;
+                case PUBLISHED;
+                case ARCHIVED;
+            }
+            
+            ----
+            <?php
+            
+            namespace Humbug;
+
+            enum Status
+            {
+                case DRAFT;
+                case PUBLISHED;
+                case ARCHIVED;
+            }
+            
+            PHP
+    ],
+];
diff --git a/specs/enum/usage.php b/specs/enum/usage.php
new file mode 100644
index 00000000..3c2c7842
--- /dev/null
+++ b/specs/enum/usage.php
@@ -0,0 +1,105 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the humbug/php-scoper package.
+ *
+ * Copyright (c) 2017 Théo FIDRY <theo.fidry@gmail.com>,
+ *                    Pádraic Brady <padraic.brady@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+return [
+    'meta' => [
+        'title' => 'Enum declaration',
+        // Default values. If not specified will be the one used
+        'prefix' => 'Humbug',
+
+        'expose-global-constants' => false,
+        'expose-global-classes' => false,
+        'expose-global-functions' => false,
+        'expose-namespaces' => [],
+        'expose-constants' => [],
+        'expose-classes' => [],
+        'expose-functions' => [],
+
+        'exclude-namespaces' => [],
+        'exclude-constants' => [],
+        'exclude-classes' => [],
+        'exclude-functions' => [],
+
+        'expected-recorded-classes' => [],
+        'expected-recorded-functions' => [],
+    ],
+
+    'typehint and create an enum' => <<<'PHP'
+    <?php
+
+    namespace Acme;
+    
+    use Status;
+
+    class BlogPost
+    {
+        public function __construct(
+            public Status $status, 
+        ) {}
+    }
+    $post = new BlogPost(Status::DRAFT);
+
+    ----
+    <?php
+    
+    namespace Humbug\Acme;
+    
+    use Humbug\Status;
+    class BlogPost
+    {
+        public function __construct(public Status $status)
+        {
+        }
+    }
+    $post = new BlogPost(Status::DRAFT);
+    
+    PHP,
+
+    'use an enum method' => <<<'PHP'
+    <?php
+
+    namespace Acme;
+    
+    use Status;
+
+    $status = Status::ARCHIVED;
+    $status->color();
+
+    ----
+    <?php
+    
+    namespace Humbug\Acme;
+    
+    use Humbug\Status;
+    $status = Status::ARCHIVED;
+    $status->color();
+    
+    PHP,
+
+    'use instance of enum' => <<<'PHP'
+    <?php
+
+    namespace Acme;
+    
+    $statusC instanceof \Post\Status;
+
+    ----
+    <?php
+    
+    namespace Humbug\Acme;
+
+    $statusC instanceof \Humbug\Post\Status;
+
+    PHP,
+];