From b059212e326ebc11ee3cbf83e64994aea6eeb326 Mon Sep 17 00:00:00 2001
From: Ruben Ayrapetyan <r.ayrapetyan@samsung.com>
Date: Wed, 30 Jul 2014 17:48:28 +0400
Subject: [PATCH] Implementing IsCallable operation.

---
 src/libecmaoperations/ecma-function-object.c | 31 ++++++++++++++++----
 src/libecmaoperations/ecma-function-object.h |  2 ++
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/src/libecmaoperations/ecma-function-object.c b/src/libecmaoperations/ecma-function-object.c
index 6e703a558..b48e43867 100644
--- a/src/libecmaoperations/ecma-function-object.c
+++ b/src/libecmaoperations/ecma-function-object.c
@@ -25,6 +25,30 @@
  * @{
  */
 
+/**
+ * IsCallable operation.
+ *
+ * See also: ECMA-262 v5, 9.11
+ *
+ * @return true, if value is callable object;
+ *         false - otherwise.
+ */
+bool
+ecma_op_is_callable( ecma_value_t value) /**< ecma-value */
+{
+  if ( value.value_type != ECMA_TYPE_OBJECT )
+    {
+      return false;
+    }
+
+  ecma_object_t *obj_p = ecma_get_pointer( value.value);
+
+  JERRY_ASSERT( obj_p != NULL );
+  JERRY_ASSERT( !obj_p->is_lexical_environment );
+
+  return true;
+} /* ecma_op_is_callable */
+
 /**
  * Function object creation operation.
  *
@@ -44,9 +68,9 @@ ecma_op_create_function_object( const ecma_char_t* formal_parameter_list_p[], /*
 
   ecma_object_t *f = ecma_create_object( NULL, true, ECMA_OBJECT_TYPE_FUNCTION);
 
-  // 2., 8
+  // 2., 6., 7., 8.
   /*
-   * We don't setup [[Get]], [[HasInstance]] for each function object.
+   * We don't setup [[Get]], [[Call]], [[Construct]], [[HasInstance]] for each function object.
    * Instead we set the object's type to ECMA_OBJECT_TYPE_FUNCTION
    * that defines which version of [[Get]] routine should be used on demand.
    */
@@ -55,9 +79,6 @@ ecma_op_create_function_object( const ecma_char_t* formal_parameter_list_p[], /*
   ecma_property_t *class_prop_p = ecma_create_internal_property( f, ECMA_INTERNAL_PROPERTY_CLASS);
   class_prop_p->u.internal_property.value = ECMA_OBJECT_CLASS_FUNCTION;
 
-  // 6., 7.
-  TODO( Decide how to setup [[Call]] and [[Construct]] );
-
   // 9.
   ecma_ref_object( scope_p);
 
diff --git a/src/libecmaoperations/ecma-function-object.h b/src/libecmaoperations/ecma-function-object.h
index a57019a22..76b492b8c 100644
--- a/src/libecmaoperations/ecma-function-object.h
+++ b/src/libecmaoperations/ecma-function-object.h
@@ -26,6 +26,8 @@
  * @{
  */
 
+extern bool ecma_op_is_callable( ecma_value_t value);
+
 extern ecma_object_t*
 ecma_op_create_function_object( const ecma_char_t* formal_parameter_list_p[],
                                 size_t formal_parameters_number,