Struct Location 

pub struct Location {
    pub source: String,
    pub database: Option<String>,
    pub schema: Option<String>,
    pub role: Option<Role>,
    pub priority: Option<i64>,
}

落点：定义之外，由「目录语义 + 连接配置」解析得到（设计 §5.2）。 落点维度 = source + database + schema（schema 仅 PostgreSQL）； role / priority 为链路声明附着的可选属性（缺省 None）。

Fields

source: String

连接选择（source 名）；缺省 DEFAULT_SOURCE

database: Option<String>

连接内「库」：Mongo db / MySQL database / SQLite attached / PG 库

schema: Option<String>

连接内「schema」：仅 PostgreSQL

role: Option<Role>

链路角色（由 links 声明附着；缺省 None = 未声明）

priority: Option<i64>

链路优先级（同 role 内升序；None 视作最大；允许负数）

Implementations

impl Location

pub fn same_place(&self, other: &Location) -> bool

落点同址判据（单点）：仅比 (source, database, schema)，不含 role/priority。

PartialEq 由 derive 覆盖全部字段，故任何「两落点是否同址」的判断一律改用本方法。

Trait Implementations

impl Clone for Location

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Location

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

Formats the value using the given formatter.

impl Default for Location

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Location

impl PartialEq for Location

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Location