Question

对于来自UNIT测试的构造函数中的某些reasone字段初始化，会破坏内存。

我有以下课程

//.h 
    class Entity
    {
    public:
...
    Entity();

    private:
        unsigned int _nextOperatorId;
        unsigned int _operators[30][4]; //from consts
... 
    }

//.cpp
Entity::Entity() : _operators(), _nextOperatorId(1)
    {
      /* If i run this from unit test i see:
         _operators [0] 0x0569bb38 {3452816845, 3452816845, 3452816845, 3452816845, 1}
         _operators [1] 0x0569bb4c {3452816845, 0, 0, 0, 0} 
         _operators [2] 0x0569bb4c {0, 0, 0, 0, 0}
        ... (all other rows are zeroes).

        If i delete _nextOperatorId(1) initialiazation, or if i run constructor from       console app, here all as expected - all rows in operators array are zeroes * /   


    }

我在VS单元测试类初始化程序中运行它，如下所示：

private
        Entity* entity;
public:
        TEST_METHOD_INITIALIZE(ClassInitialize)
        {
            entity = new Entity();
        }

那么为什么在添加_nextOperatorId（1）之后内存会被破坏？一切看起来都那么简单..

Answer 1

VC ++编译器中存在已知错误;除非在您的版本中修复，否则您不能依赖VC ++来按照C ++标准的要求对类成员进行初始化。

http://connect.microsoft.com/VisualStudio/feedback/details/564268/c-value-initialization

https://connect.microsoft.com/VisualStudio/feedback/details/746973/incorrect-c-11-value-initialization-for-type-with-implicitly-declared-but-non-trivial-default-constructor

构造函数中的字段初始化会破坏内存

1 个答案: