Support dynamic import calls (#4652)

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/include/jerryscript-core.h

@@ -279,6 +279,7 @@ void jerry_module_set_state_changed_callback (jerry_module_state_changed_callbac
 size_t jerry_module_get_number_of_requests (const jerry_value_t module_val);
 jerry_value_t jerry_module_get_request (const jerry_value_t module_val, size_t request_index);
 jerry_value_t jerry_module_get_namespace (const jerry_value_t module_val);
+void jerry_module_set_import_callback (jerry_module_import_callback_t callback_p, void *user_p);
 
 jerry_value_t jerry_native_module_create (jerry_native_module_evaluate_callback_t callback,
                                           const jerry_value_t * const exports_p, size_t number_of_exports);

jerry-core/include/jerryscript-snapshot.h

@@ -30,7 +30,7 @@ extern "C"
 /**
  * Jerry snapshot format version.
  */
-#define JERRY_SNAPSHOT_VERSION (66u)
+#define JERRY_SNAPSHOT_VERSION (67u)
 
 /**
  * Flags for jerry_generate_snapshot and jerry_generate_function_snapshot.

jerry-core/include/jerryscript-types.h

@@ -555,6 +555,13 @@ typedef jerry_value_t (*jerry_module_resolve_callback_t) (const jerry_value_t sp
                                                           const jerry_value_t referrer,
                                                           void *user_p);
 
+/**
+ * Callback which is called when an import is resolved dynamically to get the referenced module.
+ */
+typedef jerry_value_t (*jerry_module_import_callback_t) (const jerry_value_t specifier,
+                                                         const jerry_value_t user_value,
+                                                         void *user_p);
+
 /**
  * Callback which is called after the module enters into linked, evaluated or error state.
  */