通用参数必须实现“转移”。手术 [英] Generic param must implement "shift" operation
问题描述
大家好，
我想写一个这样做的通用类：
公共类X（Of T）
Public Sub方法（param为T）
dim x为T = param> 3
End Sub
End类
因此，我需要将T约束为实现>>类型的类型。运营商。
有没有办法做到这一点？
TIA - Bob
< blockquote>Bob Altman < rd*@nospam.nospamschrieb
大家好，
我想写一个执行此操作的泛型类：
公共等级X（Of T）
公共子方法（param为T）
dim x为T = param> ; 3
结束子
结束类
因此，我需要将T约束为实现>的类型>"运营商。
有没有办法做到这一点？
不，可能不是。请参阅主题基础数字类型？三天前。
你打算用这种类型做什么？如果它只是转移，你
就不需要这个Sub。
Armin
嗨Bob，
是的，如果你的泛型类的某个方法会调用参数
object'的特定运算符，你需要制作确保传递的参数
对象支持某个运算符。在VB.NET 9（来自VS 2005）中，VB.NET
已经开始支持运算符重载：
#Overloading VB.NET 2.0中的运算符
http://www.developer.com/net/ vb / arti ... 0926_3512311_2
此致，
Steven Cheng
Microsoft MSDN在线支持主管
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< blockquote class =post_quotes>
> From：" Bob Altman" < rd*@nospam.nospam>
主题：通用参数必须实现转移。操作
日期：2007年12月10日星期一09:58:59 -0800
大家好，
我想编写一个通用类来执行此操作：
公共等级X（Of T）
公共子方法（参数为T）
dim x为T = param> 3
End Sub
结束类
因此，我需要将T约束为实现>>的类型。运营商。有没有办法做到这一点？
TIA - Bob
" Steven Cheng [MSFT]" ; < st ***** @ online.microsoft.comschrieb
嗨鲍勃，
是的，如果你的通用class''s
这些类不是类，而是值类型，称为SByte，Byte，Short，
UShort，Integer，UInteger，Long ，或者说ULONG。
他在找什么就像
Public Sub Method（Of T As {SByte，Byte，Short， UShort，Integer，UInteger，
Long，ULong}）（）
End Sub
这显然是不可能的。所以，只剩下方法重载。
某些方法会调用参数
对象'的特定运算符，你需要确定传递的
参数对象支持某个运算符。在VB.NET 9中（来自
VS 2005），VB.NET已经开始支持运算符重载：
#Overloading VB.NET 2.0中的运算符
http://www.developer.com/net/ vb / arti ... 0926_3512311_2
>运算符是一个VB.Net本机运算符，只能应用于
类型上文提到的。因此我在上一篇文章中的问题还有什么呢？
必须对传递的值进行。
Armin
Hi all,
I want to write a generic class that does this:
Public Class X (Of T)
Public Sub Method(param As T)
dim x as T = param >3
End Sub
End Class
So, I need to constrain T to types that implement the ">>" operator. Is
there a way to do this?
TIA - Bob
"Bob Altman" <rd*@nospam.nospamschriebHi all,
I want to write a generic class that does this:
Public Class X (Of T)
Public Sub Method(param As T)
dim x as T = param >3
End Sub
End Class
So, I need to constrain T to types that implement the ">>" operator.
Is there a way to do this?
No, probably not. See topic "base numeric type?" three days ago.
What else do you intend to do with this type? If it was only shifting, you
wouldn''t need this Sub.
Armin
Hi Bob,
Yes, if your generic class''s certain method will call the parameter
object''s particular operator, you need to make sure the passed parameter
objects support the certain operator. In VB.NET 9 (from VS 2005), VB.NET
has started supporting operator overload:
#Overloading Operators in VB.NET 2.0
http://www.developer.com/net/vb/arti...0926_3512311_2
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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-------------------->From: "Bob Altman" <rd*@nospam.nospam>
Subject: Generic param must implement "shift" operation
Date: Mon, 10 Dec 2007 09:58:59 -0800
Hi all,
I want to write a generic class that does this:
Public Class X (Of T)
Public Sub Method(param As T)
dim x as T = param >3
End Sub
End Class
So, I need to constrain T to types that implement the ">>" operator. Is
there a way to do this?
TIA - Bob
"Steven Cheng[MSFT]" <st*****@online.microsoft.comschriebHi Bob,
Yes, if your generic class''sThe classes are not classes but value types called SByte, Byte, Short,
UShort, Integer, UInteger, Long, or ULong.
What he is looking for is something like
Public Sub Method(Of t As {SByte, Byte, Short, UShort, Integer, UInteger,
Long, ULong})()
End Sub
which obviously is not possible. So, only method overloading is left.
certain method will call the parameter
object''s particular operator, you need to make sure the passed
parameter objects support the certain operator. In VB.NET 9 (from
VS 2005), VB.NET has started supporting operator overload:
#Overloading Operators in VB.NET 2.0
http://www.developer.com/net/vb/arti...0926_3512311_2
The >operator is a VB.Net native operator that can only be applied to the
types mentioned above. Therefore the question in my previous post what else
has to be done to the value passed.
Armin
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