Struct YEventKeyChange 

#[repr(C)]
pub struct YEventKeyChange {
    pub key: *const c_char,
    pub tag: c_char,
    pub old_value: *const YOutput,
    pub new_value: *const YOutput,
}

A data type representing a single change made over a map component of shared collection types, such as YMap entries or YXmlText/YXmlElement attributes. A key field provides a corresponding unique key string of a changed entry, while tag field informs about specific type of change being done:

1. Y_EVENT_KEY_CHANGE_ADD used to identify a newly added entry. In this case an old_value field is NULL, while new_value field contains an inserted value.
2. Y_EVENT_KEY_CHANGE_DELETE used to identify an existing entry being removed. In this case an old_value field contains the removed value.
3. Y_EVENT_KEY_CHANGE_UPDATE used to identify an existing entry, which value has been changed. In this case old_value field contains replaced value, while new_value contains a newly inserted one.

Fields

key: *const c_char

A UTF8-encoded null-terminated string containing a key of a changed entry.

tag: c_char

Tag field informing about type of change current struct refers to:

1. Y_EVENT_KEY_CHANGE_ADD used to identify a newly added entry. In this case an old_value field is NULL, while new_value field contains an inserted value.
2. Y_EVENT_KEY_CHANGE_DELETE used to identify an existing entry being removed. In this case an old_value field contains the removed value.
3. Y_EVENT_KEY_CHANGE_UPDATE used to identify an existing entry, which value has been changed. In this case old_value field contains replaced value, while new_value contains a newly inserted one.

old_value: *const YOutput

Contains a removed entry’s value or replaced value of an updated entry.

new_value: *const YOutput

Contains a value of newly inserted entry or an updated entry’s new value.

Trait Implementations

impl Drop for YEventKeyChange

fn drop(&mut self)

Executes the destructor for this type.