auto [U,S,V] = svd(T,i,k);
奇异值分解，语法和malab很像。谢谢
※ 修改:·fangniuwawa 于 May  5 22:55:06 2020 修改本文·[FROM: 219.246.54.*]
※ 来源:·水木社区 http://www.newsmth.net·[FROM: 219.246.54.*]

修改:fangniuwawa FROM 219.246.54.*
FROM 219.246.54.*

thx!


std::tuple<ITensor,ITensor,ITensor>
svd(ITensor const& AA, IndexSet const& Uis,
    Args args)
    {
    ITensor U(Uis),S,V;
    svd(AA,U,S,V,args);
    auto u = commonIndex(U,S);
    auto v = commonIndex(S,V);
    return std::tuple<ITensor,ITensor,ITensor>(U,S,V);
    }


【 在 wushunchao 的大作中提到: 】
: 弄个struct呗, a.U, a.S, a.?(这个隔个点也是关键词，哈哈，真是无语）
:
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FROM 219.246.54.*

C++ 17 support

Structured bindings are always applied with the same pattern:

auto [var1, var2, ...] = <pair, tuple, struct, or array expression>;

    The list of variables var1, var2, ... must exactly match the number of variables contained by the expression being assigned from.
    The <pair, tuple, struct, or array expression> must be one of the following:
        An std::pair.
        An std::tuple.
        A struct. All members must be non-static and defined in the same base class. The first declared member is assigned to the first variable, the second member to the second variable, and so on.
        An array of fixed size.
    The type can be auto, const auto, const auto&, and even auto&&.

Not only for the sake of performance, always make sure to minimize needless copies by using references when appropriate.
【 在 fangniuwawa 的大作中提到: 】
: auto [U,S,V] = svd(T,i,k);
奇异值分解，语法和malab很像。谢谢
--
修改:mvtec FROM 67.163.48.*
FROM 67.163.48.*

structured binding 要求用 auto

而用 auto 会使可读性断崖式下跌

好奇标准委员会是怎么想的
  
【 在 mvtec () 的大作中提到: 】
: C++ 17 support
:
: Structured bindings are always applied with the same pattern:
:
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FROM 138.19.103.*

是的，都写出来  
  
【 在 zackyne () 的大作中提到: 】
: 现在还有没有类型推断的语言？你写c++ for循环的时候都把完整的类型写出来吗？
: 【 在 fanci 的大作中提到: 】
:
: - 来自「最水木 for iPhone Xr」
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FROM 124.217.188.*