C ++任何方式通过编程检测POD结构？ [英] C++ Any way to programmatically detect POD-struct?

问题描述

我有数据结构存储POD结构（每个实例化只存储一个类型，因为它基本上是一个特定的POD结构的数组）。有时另一个dev。将修改其中一个这些结构，添加或修改数据类型。如果添加非POD元件， std :: string，数据结构在运行时爆炸，因为内存模型改变。有什么方法来检测类或结构是否符合POD标准使用编译器定义或在运行时调用（避免此维护问题）？我在使用g ++（GCC）4.2.4。

I have data structure which stores POD-structs (each instantiation stores a single type only, since it is basically an array of a specific POD-struct). Sometimes another dev. will modify one of these structs, adding or modifying a data type. If a non-POD element is added, e.g. std::string, the data structure blows-up at runtime, because the memory model changes. Is there any way to detect if a class or struct is POD-compliant using compiler defines or a call at run-time (to avoid this maintainence issue) ? I'm using g++ (GCC) 4.2.4.

推荐答案

在运行时可能不，但在编译时， is_pod trait来自C ++ 0x标准库或 Boost.TypeTraits 。

At runtime probably not, but at compile time, you can use is_pod trait from either C++0x standard library or Boost.TypeTraits.

static_assert(std::is_pod<YourStruct>::value);

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