[英]Adding std::tuple to std::map compiles and works on Macos, not on Linux
Here is the following code (assuming id and speed are already initialised, and includes are correct): 这是以下代码(假设id和speed已经初始化,并且包含正确的代码):
std::map<int, std::tuple<double, double>> mymap;
mymap.insert(std::pair<int, std::tuple<double, double>>(id, speed));
This code compiles and works under Macos (Xcode using clang-800.0.42.1) and Linux (Ubuntu 16.04, gcc 5.4.0). 此代码可在Macos(使用clang-800.0.42.1的Xcode) 和 Linux(Ubuntu 16.04,gcc 5.4.0)下编译和运行。
mymap.insert(std::tie(id, speed));
This code compiles and works under Macos (Xcode using clang-800.0.42.1), but not under Linux (Ubuntu 16.04, gcc 5.4.0). 此代码可在Macos(使用clang-800.0.42.1的Xcode)下编译并工作,但在Linux(Ubuntu 16.04,gcc 5.4.0)下则不能编译。 For the latter, the error raised is: 对于后者,引发的错误是:
error: no matching function for call to 'std::map<int, std::tuple<double, double> >::insert(std::tuple<int&, std::tuple<double, double>&>)
Note that the problem is similar when trying to insert an std::tuple to an std::map (bypassed by using std::pair instead of std::tuple). 请注意,尝试将std :: tuple插入std :: map时,问题类似(通过使用std :: pair而不是std :: tuple绕过)。
Can anyone explain? 谁能解释? Thanks! 谢谢!
Tuples are added to C++ form C++11. 元组以C ++ 11形式添加到C ++。
For use of C++11 features you need to add -std=c++11 flag to your gcc compiler by default it is not activated yet. 要使用C ++ 11功能,您需要在默认情况下将-std = c ++ 11标志添加到gcc编译器。
I think mac compiles because you are using Xcode and maybe the -std=c++11 flag is already set from IDA. 我认为mac可以编译是因为您正在使用Xcode,也许-std = c ++ 11标志已从IDA设置。
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