关于julia：Inside type definition is reserved：Defining a array of structures inside another structure

Inside type definition is reserved: Defining an array of structures inside another structure

当我尝试在另一个结构中包含结构数组时，Julia 会引发错误。

1	ERROR: LoadError: syntax:"grid = Cell[]" inside type definition is reserved

这是我要运行的测试代码。

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struct Cell
color::Int64
location::Int64
Cell(color::Int64,location::Int64) = new(color,location)
Cell()=new(0,0)
end

struct Grid
dimensions::Int64
timestep::Int64
grid=Cell[]
courseGrain=Cell[]
Grid(dimensions::Int64,timestep::Int64,grid_cell::Cell,courseGrain_cell::Cell) =
new(dimensions,timestep,push!(grid,grid_cell),push!(courseGrain,courseGrain_cell))
end

目前不允许在字段声明中定义默认字段值。见 https://github.com/JuliaLang/julia/issues/10146

为了实现你想要的，将你的 grid 和 courseGrain 定义为 Cell 类型的一维数组，即 Array{Cell, 1} 或等效的 Vector{Cell}，并在构造函数中处理默认情况。

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struct Grid
dimensions::Int64
timestep::Int64
grid::Vector{Cell}
courseGrain::Vector{Cell}
Grid(dimensions::Int64,timestep::Int64,grid_cell::Cell,courseGrain_cell::Cell) =
new(dimensions,timestep,[grid],[courseGrain_cell])
end

如果您希望您的构造函数之一创建一个空的 grid 或 courseGrain，您可以在对 new.

的调用中编写 Cell[] 或 Vector{Cell}(undef, 0)