问题

我想为广播操作编写自定义方法

f.(v)

用于我的自定义函数 f。我需要做什么？

英文:

I want to write custom method for the broadcast operation

f.(v)

for my custom function f. What do I need to do for this?

答案1

得分: 1

你需要搜索有关Julia接口（非广播）的内容，以找到相关手册。

摘录：

需要实现的方法	简要描述
`Base.BroadcastStyle(::Type{SrcType}) = SrcStyle()`	`SrcType` 的广播行为
`Base.similar(bc::Broadcasted{DestStyle}, ::Type{ElType})`	分配输出容器
可选方法
`Base.BroadcastStyle(::Style1, ::Style2) = Style12()`	混合样式的优先规则
`Base.axes(x)`	声明 `x` 的索引，如 `axes(x)` 中所示。
`Base.broadcastable(x)`	将 `x` 转换为具有 `axes` 并支持索引的对象
绕过默认机制
`Base.copy(bc::Broadcasted{DestStyle})`	自定义 `broadcast` 的实现
`Base.copyto!(dest, bc::Broadcasted{DestStyle})`	自定义 `broadcast!` 的实现，专门针对 `DestStyle`
`Base.copyto!(dest::DestType, bc::Broadcasted{Nothing})`	自定义 `broadcast!` 的实现，专门针对 `DestType`
`Base.Broadcast.broadcasted(f, args...)`	在融合表达式中覆盖默认的延迟行为
`Base.Broadcast.instantiate(bc::Broadcasted{DestStyle})`	覆盖延迟广播的轴计算

英文:

You need to google for julia interfaces (not broadcasting) to find the relevant manual

excerpt:

Methods to implement	Brief description
`Base.BroadcastStyle(::Type{SrcType}) = SrcStyle()`	Broadcasting behavior of `SrcType`
`Base.similar(bc::Broadcasted{DestStyle}, ::Type{ElType})`	Allocation of output container
Optional methods
`Base.BroadcastStyle(::Style1, ::Style2) = Style12()`	Precedence rules for mixing styles
`Base.axes(x)`	Declaration of the indices of `x`, as per `axes(x)`.
`Base.broadcastable(x)`	Convert `x` to an object that has `axes` and supports indexing
Bypassing default machinery
`Base.copy(bc::Broadcasted{DestStyle})`	Custom implementation of `broadcast`
`Base.copyto!(dest, bc::Broadcasted{DestStyle})`	Custom implementation of `broadcast!`, specializing on `DestStyle`
`Base.copyto!(dest::DestType, bc::Broadcasted{Nothing})`	Custom implementation of `broadcast!`, specializing on `DestType`
`Base.Broadcast.broadcasted(f, args...)`	Override the default lazy behavior within a fused expression
`Base.Broadcast.instantiate(bc::Broadcasted{DestStyle})`	Override the computation of the lazy broadcast's axes

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