Core.point_conditions.pointIdentity

调用方式

Core.point_conditions.pointIdentity(self, unit, key)

记录依赖项 Core.point_conditions.pointIdentity，然后按该名称调用。带命名空间的调用不会传入 self：请使用冒号调用，或自行传入该对象。

作用

Observes whether unit exists and, if so, its class, for the point-resource selectors. For the player it reuses a class stored in self.longtermCache under key when it was recorded against the same UnitClass function, and otherwise stores the freshly read class there.

参数

名称	类型	作用
`self`	`RMAddon`	Rotation Master addon instance.
`unit`	`string`	Unit token to observe.
`key`	`any`	Long-term cache key for the player's class; only used for "player". The addon passes a private table.

返回值

1	`table \| nil`	{exists=false}, or {exists=true, class=token}; nil when unavailable.
2	`string \| nil`	The platform observer's reason for nil.

版本

内置辅助函数在每个版本上都会注册。不同的是它们读取的游戏 API；某个 API 缺失时，辅助函数会改用后备方案，或返回 nil 并附上原因。

该版本不可用（原因见提示）
仅在暴雪的弃用兼容层开启时

游戏 API
`UnitClass`

秘密值（正式服和永久服）

在正式服和永久服上，游戏交给插件的是秘密值。此辅助函数会检查它读取的内容（addon.Platform:CanReadValue），遇到无法比较的秘密值时返回 nil 并附上原因（例如 restricted-value），而不是返回该秘密值。请将 nil 视为不可用，而不是假。

示例

-- needs the dependency Core.point_conditions.pointIdentity
local record, reason = Functions.cache.getCached(cache, Core.point_conditions.pointIdentity, addon, "target")
if not record then return nil, reason end
return record.exists and record.class == "ROGUE"

源码

Core/point_conditions.lua，第 27 行。在游戏中为只读；“复制”会生成一份可编辑的副本。

Core.point_conditions.pointIdentity(self, unit, key)

    local platform=self.Platform
    local nativeClass=UnitClass
    local longterm=self.longtermCache
    if not platform:CanReadValue(longterm) or type(longterm)~='table' then longterm=nil end
    local class
    if unit=='player' and longterm and platform:CanReadValue(nativeClass) and type(nativeClass)=='function' then
        local entry=rawget(longterm,key)
        if platform:CanReadValue(entry) and type(entry)=='table' then
            local api,candidate=rawget(entry,'api'),rawget(entry,'class')
            if platform:CanReadValue(api) and api==nativeClass and platform:CanReadValue(candidate) and type(candidate)=='string' and candidate~='' then class=candidate end
        end
    end
    local record,reason=platform:GetUnitPointIdentityObservation(unit,class==nil)
    if not record then return nil,reason end
    if not record.exists then return record end
    if class then record.class=class
    elseif unit=='player' and longterm and type(nativeClass)=='function' and nativeClass==UnitClass then
        rawset(longterm,key,{api=nativeClass,class=record.class})
    end
    return record

返回函数参考