Question about struct - 未名空间MITBBS历史存档

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Question about struct

Question about struct# DotNet - 窗口里的风景

s*k2005-09-01 07:09

1 楼

[quote]Within an instance constructor of a struct, "this" corresponds to an
out parameter of the struct type, and within an instance function member of a
struct, "this" corresponds to a ref parameter of the struct type. In both
cases, this is classified as a variable, and it is possible to modify the
entire struct for which the function member was invoked by assigning to "this"
or by passing this as a ref or out parameter.[/quote]
Not quite get it.
Would any DX help with some intances?
Thanks.

k*i2005-09-01 07:09

2 楼

struct MyStruct
{
int x, y;
public MyStruct(int x, int y)
{
this.x = x;
this.y = y;
}
public void Change()
{
this=new MyStruct(1,1);
Print();
}
public void Print()
{
System.Console.WriteLine(this.x);
}
}
Remember, "this" is a value in class

a
this"

【在 s*******k 的大作中提到】

: [quote]Within an instance constructor of a struct, "this" corresponds to an
: out parameter of the struct type, and within an instance function member of a
: struct, "this" corresponds to a ref parameter of the struct type. In both
: cases, this is classified as a variable, and it is possible to modify the
: entire struct for which the function member was invoked by assigning to "this"
: or by passing this as a ref or out parameter.[/quote]
: Not quite get it.
: Would any DX help with some intances?
: Thanks.

w*w2005-09-01 07:09

3 楼

can you explain how to know this in class is a value type?

【在 k****i 的大作中提到】

: struct MyStruct
: {
: int x, y;
: public MyStruct(int x, int y)
: {
: this.x = x;
: this.y = y;
: }
: public void Change()
: {

s*k2005-09-01 07:09

4 楼

My understanding is:
"this" in class is a value, not a variable; while in struct, it is a variable,
which represents a storage location, mostly likely the containing variable
itself.
Am I right?
Further question regarding "this is a value in class": What is the value of
this in class then?

【在 w**w 的大作中提到】

: can you explain how to know this in class is a value type?