Introduce collection of clauses.

Clauses can have variables, so that they extend Declaration. But a
specification or a behavior can have a collection of other clauses, such
as a collection of behavior, represented by an identifier.

To build a collection of clauses, we need to instance the Collection
class with a preset clause and post-clone function. For each new offset
in the collection, the associated value is a clone from the preset
clause with the post-clone function applied on this clone. This
mechanism allows us to build modular collection of clauses.

1 files changed, 9 insertions, 1 deletions

diff --git a/Model/Specification.php b/Model/Specification.php
index 351d3e1..b5ac837 100644
--- a/Model/Specification.php
+++ b/Model/Specification.php
@@ -132,7 +132,15 @@ class Specification extends Behavior {
               break;
 
             case 'behavior':
-                $handle = new Behavior($this);
+                $handle = new Collection(
+                    new Behavior($this),
+                    function ( Behavior $clause, $identifier ) {
+
+                        $clause->setIdentifier($identifier);
+
+                        return;
+                    }
+                );
               break;
 
             case 'description':