模板编译错误在Ubuntu和使 [英] template compilation error in Ubuntu and make

问题描述

我在Windows中使用MSVS 2008编写和编译了C ++函数。他们有一些模板。

I've got C++ functions written and compiled with MSVS 2008 in Windows. They have some templates.

这些函数在Windows中编译和工作正常，但是当我在Ubuntu中使用make编译同一个项目时，会产生错误。这是模板

The functions are compiled and work just fine in Windows, but when I compile the same project in Ubuntu with "make", it generates errors. Here's the template

template <class NumType>
void drawCircles(cv::Mat& image, const cv::Mat_<cv::Vec<NumType, 2>> points, cv::Scalar color)
{
    // added working for both row/col point vector

    Point2d p0;

    for (int i = 0; i < points.cols; i++)
    {
        p0.x = cvRound(points.at<Vec<NumType, 2>>(0,i)[0]);
        p0.y = cvRound(points.at<Vec<NumType, 2>>(0,i)[1]);
        circle(image, p0, 5, color, 2, 8);
    }
}

错误不断重复：

‘points’ was not declared in this scope

有没有任何选项与make或CMake为模板创建这样的错误？

Is there any option with make or CMake that creates such error for template?

非常感谢！

推荐答案

标记你的问题C ++ 11，我只能假设你没有为你的编译器启用它。这意味着

Since you haven't tagged your question C++11, I can only assume that you haven't enabled it for your compiler. This means that

    cv::Mat_<cv::Vec<NumType, 2>> points

解释为：

    cv::Mat_<cv::Vec<NumType, (2>> points)

b $ b

2>> points 被解释为位移位运算符，这就是为什么它正在寻找一个名为 points 的变量。

The 2>> points gets interpreted as the bit shift operator and that's why it's looking for a variable named points.

关于C ++ 11的注释是因为在这个版本中，如果可能的话，>> 会被解释为模板参数列表的两端，意思是你的语法是正确的。

The comment about C++11 is because this situation changed in this version where >> will be interpreted as two end of template parameter lists if possible, meaning your syntax would be correct.

解决方案是在你的编译器中启用C ++ 11或关闭两个模板参数列表，如下所示：

The solution is to either enable C++11 in your compiler or close two template parameter lists like this:

    cv::Mat_<cv::Vec<NumType, 2> > points

注意添加的新空间。

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