Special values of the chooser index

Detailed Description

Used in the following contexts: 1.

as the return value of the choose() function 2. as the `idx` field of the return value of the get_item_index(), ins(), del(), edit(), enter(), refresh() callbacks of the `chooser_t` structure 3. as the parameter `n` of the chooser_t::refresh() callback Usage matrix

Variables
static constexpr ssize_t	chooser_base_t::NO_SELECTION = -1
	there is no selected item
static constexpr ssize_t	chooser_base_t::EMPTY_CHOOSER = -2
	the chooser has no data and cannot be displayed
static constexpr ssize_t	chooser_base_t::ALREADY_EXISTS = -3
	the non-modal chooser with the same data is already open
static constexpr ssize_t	chooser_base_t::NO_ATTR = -4
	reserved for IDAPython