C++11 正确的结构初始化
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C++11 Proper Structure Initialization
提问by 01100110
Having a structure like this in C++11:
在 C++11 中有这样的结构:
struct von
{
std::string Name;
unsigned int ID;
std::vector<std::string> Checks;
};
Should it be initialized like this:
它应该像这样初始化:
von v = {"",0,{}};
Or like this:
或者像这样:
von v = {};
Both ways seem to work, but the compiler warns about -Wmissing-field-initializers
on the latter example.
两种方式似乎都有效,但编译器-Wmissing-field-initializers
对后一个示例发出警告。
Edit:
Here are my compiler options:
编辑:
这是我的编译器选项:
g++ main.cpp -ansi -Wall -Wextra -Weffc++ -std=c++0x
I'm using g++ (Debian 4.6.2-12) 4.6.2
我正在使用 g++ (Debian 4.6.2-12) 4.6.2
采纳答案by cooky451
This doesn't require initializer_list at all and work perfectly fine with C++03. Edit: (Ok, for the initialization of the vector you need C++11) In a struct or array initialization, all not explicitly given values are zero-initialized, so if that's what you want = {}; will work just fine.
这根本不需要 initializer_list 并且在 C++03 中工作得很好。编辑:(好吧,对于你需要 C++11 的向量的初始化)在结构或数组初始化中,所有没有明确给出的值都是零初始化的,所以如果这就是你想要的 = {}; 会工作得很好。