覆盖==运算符的问题 [英] Problems overrideing the == operator
问题描述
有谁可以告诉我在下面的代码片段中我做错了什么？
我只是试图覆盖==运算符但没有运气。我的b $ b甚至不能让它达到==方法顶部的断点。我用来比较的
代码行是：
MyState a = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
MyState b = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
if（a == b）
{
...
}
请注意以下内容对我来说没问题：
if（a.Equals（b））< br $>
{
...
}
我不知道我是不是使用它不正确，因为==必须是静态的
或什么...
谢谢，
丹
公共类MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get {return m_state; }
}
公共MyState（LINE_STATE状态）
{
m_state = state; < br $>
}
public static bool operator ==（MyState state1，MyState state2）
{
bool ret = false;
尝试
{
if（state1！= null&& state2！= null）
{
ret = state1.PrimitiveState ==
state2.PrimitiveState;
}
}
catch（exception ex）
{
LoggerUtil.LogError（MethodBase.GetCurrentMethod（），
ex.Message，ex.StackTrace）;
}
返回ret;
}
public static bool operator！=（MyState state1，MyState state2）
{
return！（state1 == state2）;
}
公共覆盖bool Equals（对象obj）
{
bool ret = false;
if（obj！= null&& obj is MyState）
{
ret = this.PrimitiveStat e ==
（（MyState）obj）。PrimitiveState;
}
返回ret;
}
公共覆盖int GetHashCode（）
{
返回base.GetHashCode（）;
}
}
Can anyone tell me what I''m doing wrong in the below snippet of code?
I''m simply trying to override the == operator but having no luck. I
can''t even get it to hit a break point at the top of the == method. The
line of code I''m using to compare is:
MyState a = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
MyState b = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
if (a == b)
{
...
}
Note that the following works fine for me:
if (a.Equals(b))
{
...
}
I don''t know if I''m using it incorrectly because the == must be static
or what...
Thanks,
Dan
public class MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get { return m_state; }
}
public MyState(LINE_STATE state)
{
m_state = state;
}
public static bool operator ==(MyState state1, MyState state2)
{
bool ret = false;
try
{
if (state1 != null && state2 != null)
{
ret = state1.PrimitiveState ==
state2.PrimitiveState;
}
}
catch (Exception ex)
{
LoggerUtil.LogError(MethodBase.GetCurrentMethod(),
ex.Message, ex.StackTrace);
}
return ret;
}
public static bool operator !=(MyState state1, MyState state2)
{
return !(state1 == state2);
}
public override bool Equals(object obj)
{
bool ret = false;
if (obj != null && obj is MyState)
{
ret = this.PrimitiveState ==
((MyState)obj).PrimitiveState;
}
return ret;
}
public override int GetHashCode()
{
return base.GetHashCode();
}
}
推荐答案
有你试过
public static bool operator ==（MyState state1，MyState state2）
{
返回a.Equals（b） ;
}
应该有效。
HTH，
詹姆斯。
mathboy2写道：
Hi,
have you tried
public static bool operator ==(MyState state1, MyState state2)
{
return a.Equals(b);
}
that should work.
HTH,
James.
mathboy2 wrote:
有谁能告诉我在下面的代码片段中我做错了什么？
我只是试图覆盖==运算符但没有运气。我的b $ b甚至不能让它达到==方法顶部的断点。我用来比较的
代码行是：
MyState a = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
MyState b = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
if（a == b）
{
...
}
请注意以下内容对我来说没问题：
if（a.Equals（b））< br $>
{
...
}
我不知道我是不是使用它不正确，因为==必须是静态的
或什么...
谢谢，
丹
公共类MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get {return m_state; }
}
公共MyState（LINE_STATE状态）
{
m_state = state; < br $>
}
public static bool operator ==（MyState state1，MyState state2）
{
bool ret = false;
尝试
{
if（state1！= null&& state2！= null）
{
ret = state1.PrimitiveState ==
state2.PrimitiveState;
}
}
catch（exception ex）
{
LoggerUtil.LogError（MethodBase.GetCurrentMethod（），
ex.Message，ex.StackTrace）;
}
返回ret;
}
public static bool operator！=（MyState state1，MyState state2）
{
返回！（state1 == state2）;
}
公共覆盖bool Equals（object obj）
{
bool ret = false;
if（obj！= null&& obj是MyState）
{
ret = this.PrimitiveState ==
（（MyState）obj）.PrimitiveState;
}
返回ret;
}
公共覆盖int GetHashCode（）
{
返回base.GetHashCode（）;
}
}
Can anyone tell me what I''m doing wrong in the below snippet of code?
I''m simply trying to override the == operator but having no luck. I
can''t even get it to hit a break point at the top of the == method. The
line of code I''m using to compare is:
MyState a = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
MyState b = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
if (a == b)
{
...
}
Note that the following works fine for me:
if (a.Equals(b))
{
...
}
I don''t know if I''m using it incorrectly because the == must be static
or what...
Thanks,
Dan
public class MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get { return m_state; }
}
public MyState(LINE_STATE state)
{
m_state = state;
}
public static bool operator ==(MyState state1, MyState state2)
{
bool ret = false;
try
{
if (state1 != null && state2 != null)
{
ret = state1.PrimitiveState ==
state2.PrimitiveState;
}
}
catch (Exception ex)
{
LoggerUtil.LogError(MethodBase.GetCurrentMethod(),
ex.Message, ex.StackTrace);
}
return ret;
}
public static bool operator !=(MyState state1, MyState state2)
{
return !(state1 == state2);
}
public override bool Equals(object obj)
{
bool ret = false;
if (obj != null && obj is MyState)
{
ret = this.PrimitiveState ==
((MyState)obj).PrimitiveState;
}
return ret;
}
public override int GetHashCode()
{
return base.GetHashCode();
}
}
这是一个好主意，但问题是我甚至无法获得线程
进入公共静态bool运算符==（）方法第一个
的地方。逻辑是一样的，所以一旦我可以在那里得到它应该
只是工作...
Dan
pigeonrandle写道：
It''s a good idea, but the problem is that I can''t even get the thread
to enter the public static bool operator ==() method in the first
place. The logic is the same so once I can get it in there it should
just work...
Dan
pigeonrandle wrote:
你试过吗
public static bool operator ==（MyState state1，MyState state2）
{
返回a.Equals（b）;
}
应该有效。
HTH，
詹姆斯。
mathboy2写道：
Hi,
have you tried
public static bool operator ==(MyState state1, MyState state2)
{
return a.Equals(b);
}
that should work.
HTH,
James.
mathboy2 wrote:
有谁能告诉我在下面的代码片段中我做错了什么？
我只是简单试图覆盖==运算符但没有运气。我的b $ b甚至不能让它达到==方法顶部的断点。我用来比较的
代码行是：
MyState a = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
MyState b = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
if（a == b）
{
...
}
请注意以下内容对我来说没问题：
if（a.Equals（b））< br $>
{
...
}
我不知道我是不是使用它不正确，因为==必须是静态的
或什么...
谢谢，
丹
公共类MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get {return m_state; }
}
公共MyState（LINE_STATE状态）
{
m_state = state; < br $>
}
public static bool operator ==（MyState state1，MyState state2）
{
bool ret = false;
尝试
{
if（state1！= null&& state2！= null）
{
ret = state1.PrimitiveState ==
state2.PrimitiveState;
}
}
catch（exception ex）
{
LoggerUtil.LogError（MethodBase.GetCurrentMethod（），
ex.Message，ex.StackTrace）;
}
返回ret;
}
public static bool operator！=（MyState state1，MySt吃了州2）
{
返回！（state1 == state2）;
}
public override bool Equals（object obj）
{
bool ret = false;
if（obj！= null&& obj是MyState）
{
ret = this.PrimitiveState ==
（（MyState）obj）.PrimitiveState;
}
返回ret;
}
公共覆盖int GetHashCode（）
{
返回base.GetHashCode（）;
}
}
Can anyone tell me what I''m doing wrong in the below snippet of code?
I''m simply trying to override the == operator but having no luck. I
can''t even get it to hit a break point at the top of the == method. The
line of code I''m using to compare is:
MyState a = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
MyState b = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
if (a == b)
{
...
}
Note that the following works fine for me:
if (a.Equals(b))
{
...
}
I don''t know if I''m using it incorrectly because the == must be static
or what...
Thanks,
Dan
public class MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get { return m_state; }
}
public MyState(LINE_STATE state)
{
m_state = state;
}
public static bool operator ==(MyState state1, MyState state2)
{
bool ret = false;
try
{
if (state1 != null && state2 != null)
{
ret = state1.PrimitiveState ==
state2.PrimitiveState;
}
}
catch (Exception ex)
{
LoggerUtil.LogError(MethodBase.GetCurrentMethod(),
ex.Message, ex.StackTrace);
}
return ret;
}
public static bool operator !=(MyState state1, MyState state2)
{
return !(state1 == state2);
}
public override bool Equals(object obj)
{
bool ret = false;
if (obj != null && obj is MyState)
{
ret = this.PrimitiveState ==
((MyState)obj).PrimitiveState;
}
return ret;
}
public override int GetHashCode()
{
return base.GetHashCode();
}
}
mathboy2写道：
mathboy2 wrote:
任何人都可以在下面的片段中告诉我我做错了什么代码？
我只是试图覆盖==运算符但没有运气。我的b $ b甚至不能让它达到==方法顶部的断点。我用来比较的
代码行是：
MyState a = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
MyState b = new MyState（LINE_STATE.LINE_STATE_UNKNOWN）;
if（a == b）
{
...
}
请注意以下内容对我来说没问题：
if（a.Equals（b））< br $>
{
...
}
我不知道我是不是使用它不正确，因为==必须是静态的
或什么...
谢谢，
丹
公共类MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get {return m_state; }
}
公共MyState（LINE_STATE状态）
{
m_state = state; < br $>
}
public static bool operator ==（MyState state1，MyState state2）
{
bool ret = false;
尝试
{
if（state1！= null&& state2！= null）
Can anyone tell me what I''m doing wrong in the below snippet of code?
I''m simply trying to override the == operator but having no luck. I
can''t even get it to hit a break point at the top of the == method. The
line of code I''m using to compare is:
MyState a = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
MyState b = new MyState(LINE_STATE.LINE_STATE_UNKNOWN);
if (a == b)
{
...
}
Note that the following works fine for me:
if (a.Equals(b))
{
...
}
I don''t know if I''m using it incorrectly because the == must be static
or what...
Thanks,
Dan
public class MyState
{
private LINE_STATE m_state = LINE_STATE.LINE_STATE_UNKNOWN;
public LINE_STATE PrimitiveState
{
get { return m_state; }
}
public MyState(LINE_STATE state)
{
m_state = state;
}
public static bool operator ==(MyState state1, MyState state2)
{
bool ret = false;
try
{
if (state1 != null && state2 != null)
嗯，您认为这会发生什么？ state1！= null将调用
运算符！=
dereferences null和... splat。
试试这个：
public static bool operator ==（MyState state1，MyState state2）
{
bool ret = false;
尝试
{
if（！state1.Equals（null）&&！state2.Equals（null））
{
ret = state1.PrimitiveState ==
state2.PrimitiveState;
}
}
catch（exception ex）
{
Console.Out.WriteLine（" Exception：" + ex.Message）;
}
返回ret;
}
请记住，在Equals中，对象是TYPE对象，在！=和
==运营商
对象是TYPE MyState，递归到死。
Matt
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