Support $this.

Create the sub-library `Hoa\Praspel\AssertionChecker` and introduce
$this support through “implicit variables”.

1 files changed, 23 insertions, 0 deletions

diff --git a/Model/Specification.php b/Model/Specification.php
index 09b52cf..ad348af 100644
--- a/Model/Specification.php
+++ b/Model/Specification.php
@@ -87,6 +87,13 @@ class Specification extends Behavior {
         'description'
     );
 
+    /**
+     * Implicit variables.
+     *
+     * @var \Hoa\Praspel\Model\Specification array
+     */
+    protected $_implicitVariables     = array();
+
 
 
     /**
@@ -101,6 +108,22 @@ class Specification extends Behavior {
     }
 
     /**
+     * Get an implicit variable.
+     *
+     * @access  public
+     * @param   string  $identifier    Identifier.
+     * @return  \Hoa\Praspel\Model\Variable\Implicit
+     */
+    public function getImplicitVariable ( $identifier ) {
+
+        if(isset($this->_implicitVariables[$identifier]))
+            return $this->_implicitVariables[$identifier];
+
+        return $this->_implicitVariables[$identifier]
+                   = new Variable\Implicit($identifier, false, $this);
+    }
+
+    /**
      * Get identifier (fallback).
      *
      * @access  protected