C ++编译器抱怨没有默认构造函数

问题描述

给这个结构一个私有的有状态变量:

Given this struct with a private stateful variable:

struct Calibrate
{
private:
    Stitcher stitcher_obj_;

}

这是装订器对象(具有空的构造函数):

This is the stitcher object (with empty constructor):

Stitcher::Stitcher(const std::vector<cv::Mat> &src_images){}

调用 Calibrate 时，出现此错误:

default constructor of 'Calibrate' is implicitly deleted because field 'stitcher_obj_' has no default constructor
Stitcher stitcher_obj_
         ^

感谢您提供有关解决此问题的建议！

Thanks for any suggestions on how to fix this!

推荐答案

为类提供自定义构造函数后，将不再合成默认构造函数(参数为0的构造函数).您需要像这样手动恢复它:

As soon as you provide a custom constructor for a class, the default constructor (the 0 argument constructor) is no longer synthesized. You need to reinstate it manually, like this:

class Stitcher {
  Stitcher() = default;
  // ...
};

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