Enum CandidateSource 

#[repr(u8)]
pub enum CandidateSource {
    Database = 0,
    UserDatabase = 1,
    CloudSuggestion = 2,
    AiSuggestion = 3,
    EnglishDictionary = 4,
    QuickPhrase = 5,
    Emoji = 6,
    Kaomoji = 7,
    Generated = 8,
    Fallback = 9,
    NeuralKeyboard = 11,
    AiPending = 12,
    MixedJapanese = 13,
    Plugin = 14,
    CloudPending = 15,
    Contact = 16,
    Collocation = 17,
    Multilingual = 18,
}

Where a candidate row came from. The discriminant is the wire value; never reorder.

Variants

Database = 0

UserDatabase = 1

CloudSuggestion = 2

AiSuggestion = 3

EnglishDictionary = 4

QuickPhrase = 5

Emoji = 6

emoji 行，也用于混排的符号行（打拼音出符号，local::symbol_candidates）：两者选中时都整段上屏、结束组字，不学习、不调频，也不能置顶、固定或删除。

Kaomoji = 7

Generated = 8

Fallback = 9

NeuralKeyboard = 11

A lattice path the keyboard (speed) sentence model picked.

AiPending = 12

AI 候选的占位行（#6888），已退役：共享内核不再产生它，AI 回答到达时第一条直接插在第一页最后一格（.agents/notes/implemented/feature/2026-10-16-ai-candidate-last-slot.md）。值保留不复用；引擎和宿主对它的处理（不能上屏、不学习、不计入统计、画成暗色）照旧，旧版本留下的行仍按这些规则处理。

MixedJapanese = 13

日文混输（实验选项，默认关）混进全拼、双拼候选的那一行：整段输入按罗马字转换出的最佳日文。它不属于下面任何一个谓词，所以选中时整段上屏并结束组字（与混输英文同一条路），不调词频、不记整句、不进个人上下文，也不能置顶、固定或删除；宿主不对它做简繁转换。

Plugin = 14

脚本插件在自己的 / 指令里给出的行，只在桌面产生（宿主经 Session::apply_plugin_command_rows 写进来）。它不属于下面任何一个谓词：选中时整段上屏并结束组字，不调词频、不记整句、不进个人上下文，不能置顶、固定或删除；runtime 不把它的上屏喂进 AI 上文，宿主不为它请求释义或翻译，上屏也不转全角。

CloudPending = 15

云候选尚在请求中；它占据云候选的固定位置，回答到达时由第一条云候选替换。值追加在已有 ABI 之后，不能复用旧值。

Contact = 16

Android 联系人导入提供的手机号候选；选中后直接上屏，不学习、不管理。

Collocation = 17

octagram .gram 语法模型参与词格解码时，解码首选的整句行。句子仍是词格 解出来的，搭配强度表只负责逐边加分；落库/学习判定与 Generated 同类。

Multilingual = 18

连续多语言转换的完整路径；整段消费，不调频、不学习跨语言整句，也不参与候选管理。

Implementations

impl CandidateSource

pub fn from_u8(value: u8) -> Option<Self>

pub fn is_online(self) -> bool

pub fn is_cloud_pending(self) -> bool

pub fn holds_ai_seat(self) -> bool

AI 行：AI 候选和已退役的占位行。

pub fn takes_online_seat(self) -> bool

由在线座位规则摆放的行：云候选、AI 候选和已退役的 AI 占位行。

pub fn is_generated_or_fallback(self) -> bool

整句猜出来的行：词格 Generated/Collocation、解码器 Fallback。 它们的选中都整段上屏、按词边界记进个人上下文、不落词库调频。

pub fn is_sentence_learning(self) -> bool

Rows a direct selection stores as a user phrase, because there is no dictionary row whose frequency could be adjusted instead.

pub fn is_dictionary(self) -> bool

Trait Implementations

impl Clone for CandidateSource

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for CandidateSource

impl Debug for CandidateSource

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CandidateSource

fn default() -> Self

Returns the “default value” for a type.

impl Eq for CandidateSource

impl Hash for CandidateSource

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for CandidateSource

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CandidateSource