d语言如何去样板.

如何去样板:

auto someRandomName  = f(...); 
//f返回包含两部分的元组
auto firstPart = someRandomName[0];
auto secondPart = someRandomName[1];

我会这样:

/// 按参数传递元组的成员给函数
template unpack(alias fun)
{
    import std.typecons: isTuple;

    auto unpack(T)(T args)
        if (isTuple!T)
    {
        return fun(args.expand);
    }
}

//这样用:

f(...).unpack!((firstPart, secondPart) {
    // 用1,2部分
});

区间管道也可以:

auto nums = [1, 2, 3];
auto animals = ["lion", "tiger", "bear"];

zip(nums, animals)
    .map!(unpack!((num, animal) => animal.repeat(num).joiner(" ")))
    .each!writeln;

//...打印:
lion
tiger tiger
bear bear bear