XrResult(3) Manual Page

typedef enum XrResult {
    XR_SUCCESS = 0,
    XR_TIMEOUT_EXPIRED = 1,
    XR_SESSION_VISIBILITY_UNAVAILABLE = 2,
    XR_SESSION_LOSS_PENDING = 3,
    XR_EVENT_UNAVAILABLE = 4,
    XR_STATE_UNAVAILABLE = 5,
    XR_STATE_TYPE_UNAVAILABLE = 6,
    XR_SPACE_BOUNDS_UNAVAILABLE = 7,
    XR_SESSION_NOT_FOCUSED = 8,
    XR_FRAME_DISCARDED = 9,
    XR_ERROR_VALIDATION_FAILURE = -1,
    XR_ERROR_RUNTIME_FAILURE = -2,
    XR_ERROR_OUT_OF_MEMORY = -3,
    XR_ERROR_RUNTIME_VERSION_INCOMPATIBLE = -4,
    XR_ERROR_DRIVER_INCOMPATIBLE = -5,
    XR_ERROR_INITIALIZATION_FAILED = -6,
    XR_ERROR_FUNCTION_UNSUPPORTED = -7,
    XR_ERROR_EXTENSION_NOT_PRESENT = -9,
    XR_ERROR_LIMIT_REACHED = -10,
    XR_ERROR_SIZE_INSUFFICIENT = -11,
    XR_ERROR_HANDLE_INVALID = -12,
    XR_ERROR_INSTANCE_LOST = -13,
    XR_ERROR_SESSION_RUNNING = -14,
    XR_ERROR_SESSION_NOT_RUNNING = -16,
    XR_ERROR_SESSION_LOST = -17,
    XR_ERROR_SYSTEM_INVALID = -18,
    XR_ERROR_PATH_INVALID = -19,
    XR_ERROR_PATH_COUNT_EXCEEDED = -20,
    XR_ERROR_PATH_FORMAT_INVALID = -21,
    XR_ERROR_LAYER_INVALID = -22,
    XR_ERROR_LAYER_LIMIT_EXCEEDED = -23,
    XR_ERROR_SWAPCHAIN_RECT_INVALID = -25,
    XR_ERROR_SWAPCHAIN_FORMAT_UNSUPPORTED = -26,
    XR_ERROR_ACTION_TYPE_MISMATCH = -27,
    XR_ERROR_REFERENCE_SPACE_UNSUPPORTED = -31,
    XR_ERROR_FILE_ACCESS_ERROR = -32,
    XR_ERROR_FILE_CONTENTS_INVALID = -33,
    XR_ERROR_FORM_FACTOR_UNSUPPORTED = -34,
    XR_ERROR_FORM_FACTOR_UNAVAILABLE = -35,
    XR_ERROR_API_LAYER_NOT_PRESENT = -36,
    XR_ERROR_CALL_ORDER_INVALID = -37,
    XR_ERROR_GRAPHICS_DEVICE_INVALID = -38,
    XR_ERROR_POSE_INVALID = -39,
    XR_ERROR_INDEX_OUT_OF_RANGE = -40,
    XR_ERROR_VIEW_CONFIGURATION_TYPE_UNSUPPORTED = -41,
    XR_ERROR_ENVIRONMENT_BLEND_MODE_UNSUPPORTED = -42,
    XR_ERROR_BINDINGS_DUPLICATED = -43,
    XR_ERROR_NAME_DUPLICATED = -44,
    XR_ERROR_NAME_INVALID = -45,
    XR_ERROR_ANDROID_THREAD_SETTINGS_ID_INVALID_KHR = -1000003000,
    XR_ERROR_ANDROID_THREAD_SETTINGS_FAILURE_KHR = -1000003001,
    XR_ERROR_DEBUG_UTILS_MESSENGER_INVALID_EXT = -1000019000,
    XR_RESULT_MAX_ENUM = 0x7FFFFFFF
} XrResult;