### Method

# JavaScriptCore Class add_constructorv

#### Declaration [src]

    JSCValue*
    jsc_class_add_constructorv (
      JSCClass* jsc_class,
      const char* name,
      GCallback callback,
      gpointer user_data,
      GDestroyNotify destroy_notify,
      GType return_type,
      guint n_parameters,
      GType* parameter_types
    )

#### Description [src]

Add a constructor to `jsc_class`. If `name` is `NULL`, the class name will be used. When new is used with the constructor or `jsc_value_constructor_call()` is called, `callback` is invoked receiving the parameters and `user_data` as the last parameter. When the constructor object is cleared in the `JSCClass` context, `destroy_notify` is called with `user_data` as parameter.

This function creates the constructor, which needs to be added to an object as a property to be able to use it. Use `jsc_context_set_value()` to make the constructor available in the global object.

Note that the value returned by `callback` is adopted by `jsc_class`, and the `GDestroyNotify` passed to `jsc_context_register_class()` is responsible for disposing of it.

This method is renamed to `jsc_class_add_constructor()` in language bindings

#### Parameters

`name` | `const char*`
| The constructor name or `NULL`.
| The argument can be `NULL`.
| The data is owned by the caller of the function.
| The value is a NUL terminated UTF-8 string.
`callback` | `GCallback`
| A `GCallback` to be called to create an instance of `jsc_class`.
`user_data` | `gpointer`
| User data to pass to `callback`.
| The argument can be `NULL`.
| The data is owned by the caller of the function.
`destroy_notify` | `GDestroyNotify`
| Destroy notifier for `user_data`.
| The argument can be `NULL`.
`return_type` | `GType`
| The `GType` of the constructor return value.
`n_parameters` | `guint`
| The number of parameters.
`parameter_types` | An array of `GType`
| A list of `GType`s, one for each parameter, or `NULL`.
| The argument can be `NULL`.
| The length of the array is specified in the `n_parameters` argument.
| The data is owned by the caller of the function.

#### Return value

Returns: | `JSCValue`
| A `JSCValue` representing the class constructor.
| The caller of the method takes ownership of the data, and is responsible for freeing it.