如何使用；新的（……）”；在Julia中的类型定义内部？

我正在阅读一段代码，对类型声明中新方法的使用感到困惑

通过搜索互联网，我了解了内部构造函数和外部构造函数的含义，我知道这是Julia中新方法的主要用途，如下链接：

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我的困惑主要如下。新方法中提供的值的数量小于类型声明中的字段数量。有人能给我解释一下吗

您可以使用少于字段数的参数调用

new

，以获得未完全初始化的对象

正如Julia手册的章节所解释的，这是有意的

这对于可变结构非常有用（引用手册）：

内部构造函数方法可以将不完整的对象传递给其他函数以委托其完成：

type GenConfig
    outputPath::String
    mode::String # "all" or "calls"

    # output file names
    ambsFilename::String
    arcsFilename::String
    callsFilename::String
    hospitalsFilename::String
    mapFilename::String
    nodesFilename::String
    prioritiesFilename::String
    stationsFilename::String
    travelFilename::String

    # counts
    numAmbs::Int
    numCalls::Int
    numHospitals::Int
    numStations::Int

    # graph
    xNodes::Int # number of nodes in x direction
    yNodes::Int # number of nodes in y direction

    # map
    map::Map
    mapTrim::Float # fraction of map border to trim, to make sure   objects generated on map are inside borders

    # misc
    startTime::Float
    targetResponseTime::Float
    offRoadSpeed::Float
    stationCapacity::Int
    travelModeSpeeds::Vector{Float}

    # call density raster
    callDensityRasterFilename::String
    cropRaster::Bool
    callRasterCellSeed::Int # seed for rng, will generate raster cell index
    callRasterCellLocSeed::Int # seed for rng, will generate location within raster cell

    # call related distributions and random number generators
    interarrivalTimeDistrRng::DistrRng
    priorityDistrRng::DistrRng
    dispatchDelayDistrRng::DistrRng
    onSceneDurationDistrRng::DistrRng
    transferDistrRng::DistrRng
    transferDurationDistrRng::DistrRng

    # misc RNGs
    ambStationRng::AbstractRNG
    callLocRng::AbstractRNG
    hospitalLocRng::AbstractRNG
    stationLocRng::AbstractRNG

    travelTimeFactorDistrRng::DistrRng

    GenConfig() = new("", "",
        "", "", "", "", "", "", "", "", "",
        nullIndex, nullIndex, nullIndex, nullIndex,
        nullIndex, nullIndex,
        Map(), 1e-6,
        nullTime, nullTime, nullTime, nullIndex, [],
        "", false, nullIndex, nullIndex)
end

julia> mutable struct Lazy
           data
           Lazy(v) = complete_me(new(), v)
       end