如果有疑问 - 写代码 - 但...... [英] When in doubt - write code - but ...
问题描述
所以我总是被告知 - 当有疑问时 - 把它写出来然后运行它看看
你自己发生了什么。
但最近有人告诉我，如果我有一个值类型并且我传递它
byref，它将始终打包/取消装箱。我如何找到真相？
- Sahil Malik
http://dotnetjunkies.com/weblog/sahilmalik
So I have always been told - when in doubt - write it out and run it and see
for yourself what happens.
But someone recently told me that if I have a value type and I pass it
byref, it will always box/unbox it. How do I find the truth?
- Sahil Malik
http://dotnetjunkies.com/weblog/sahilmalik
推荐答案
" Sahil Malik <共***************** @ nospam.com>在消息中写道
news：u9 ************** @ TK2MSFTNGP10.phx.gbl ...
"Sahil Malik" <co*****************@nospam.com> wrote in message
news:u9**************@TK2MSFTNGP10.phx.gbl...
所以我一直都是告诉 - 当有疑问时 - 把它写出来并运行它
看看
自己发生了什么。
但最近有人告诉我，如果我有一个值类型并且我通过它是
byref，它总是打包/取消装箱。我如何找到真相？
So I have always been told - when in doubt - write it out and run it and
see
for yourself what happens.
But someone recently told me that if I have a value type and I pass it
byref, it will always box/unbox it. How do I find the truth?
不，将它作为一个对象传递给一个盒子，通过ref传递它或者传递
结果在传递的堆栈地址中（ldloca指令）
No, passing it as an object results in a box, passing it via ref or out
results in the stack address being passed(ldloca instruction)
Sahil ....使用反汇编程序查看由
生成的IL字节代码这两种方法。
http://www.geocities.com/ jeff_louie / il__net.htm
问候，
杰夫
如何找到真相？
***通过开发人员指南 http://www.developersdex.com 发送***
不要只是参加USENET ......获得奖励！
Sahil.... Use the disassembler to look at the IL byte code generated by
the two approaches.
http://www.geocities.com/jeff_louie/il__net.htm
Regards,
Jeff
How do I find the truth?
*** Sent via Developersdex http://www.developersdex.com ***
Don''t just participate in USENET...get rewarded for it!
嗯..我是这么认为的！ !!
- Sahil Malik
http ：//dotnetjunkies.com/weblog/sahi lmalik
Daniel O''Connell [C＃MVP]" < onyxkirx @ - NOSPAM--comcast.net>写在
消息新闻：eQ ************** @ TK2MSFTNGP09.phx.gbl ...
Hmm .. I thought so !!!!
- Sahil Malik
http://dotnetjunkies.com/weblog/sahilmalik
"Daniel O''Connell [C# MVP]" <onyxkirx@--NOSPAM--comcast.net> wrote in
message news:eQ**************@TK2MSFTNGP09.phx.gbl...
" ; Sahil Malik <共***************** @ nospam.com>在消息中写道
新闻：u9 ************** @ TK2MSFTNGP10.phx.gbl ...
"Sahil Malik" <co*****************@nospam.com> wrote in message
news:u9**************@TK2MSFTNGP10.phx.gbl...
所以我一直被告知 - 在怀疑 - 把它写出来然后运行吧
看看
自己发生了什么。
但有人最近告诉我，如果我有一个值类型并且我通过它
byref，它将始终打包/取消装箱。我如何找到真相？
So I have always been told - when in doubt - write it out and run it and
see
for yourself what happens.
But someone recently told me that if I have a value type and I pass it
byref, it will always box/unbox it. How do I find the truth?
不，将其作为对象传递会产生一个框，通过ref或out传递它会导致堆栈地址被传递（ldloca）指示）
No, passing it as an object results in a box, passing it via ref or out
results in the stack address being passed(ldloca instruction)
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