灵活的数组成员在C ++中是否有效？ [英] Are flexible array members valid in C++?

问题描述

在C99中，您可以声明结构的一个弹性数组成员，如下所示：

  struct blah 
 { 
 int foo []; 
};但是，当有人在工作时试图使用C ++中的clang来编译一些代码时，那个语法并没有使用。工作。 （它一直在与MSVC工作。）我们不得不将其转换为：
  struct blah 
 {
 int foo [0]; 
}; 
  
通过C ++标准，我没有发现灵活的成员数组;我一直认为 [0] 是一个无效的声明，但显然对于一个灵活的成员数组是有效的。灵活的成员数组在C ++中是否真的有效？如果是，是正确的声明 [] 或 [0] ？
 
In C99, you can declare a flexible array member of a struct as such:
struct blah
{
    int foo[];
};
However, when someone here at work tried to compile some code using clang in C++, that syntax did not work. (It had been working with MSVC.) We had to convert it to:
struct blah
{
    int foo[0];
};
Looking through the C++ standard, I found no reference to flexible member arrays at all; I always thought [0] was an invalid declaration, but apparently for a flexible member array it is valid. Are flexible member arrays actually valid in C++? If so, is the correct declaration [] or [0]?
解决方案
C++ was first standardized in 1998, so it predates the addition of flexible array members to C (which was new in C99). There was a corrigendum to C++ in 2003, but that didn't add any relevant new features. The next revision of C++ (C++0x) is still under development, and it seems flexible array members aren't added to it.

                        
这篇关于灵活的数组成员在C ++中是否有效？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！