Re: Using ref

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Peter Duniho wrote:
Hilton wrote:
What example is it that you are saying uses "ldloca.s"? Are you
comparing this to managed code? If not, how can that be "same as C"?

In any case, the "ldloca.s" instruction is used when you pass by
reference, yes. But that's only when you use the "ref" or "out" keyword.

My point is that the C# call "method (ref x)" is defined by
you/Jon/community as being pass by reference, yet the C call "method (&x)"
is defined by you/Jon/community as being pass by value - they're doing
EXACTLY the same thing. Both simply take the address of x and pass it
along. Does a prettier syntax changes the entire concept? And if
Microsoft has used "&" instead of "ref" in its definition of the C#
language, would that now mean that the C# call "method (&x)" was now pass by
value???

Pete, really, I don't want to spend more of your time or my time on this.
In my mind (which I agree probably doesn't fit the pure definition of the
pass-by definitions), if I pass a reference or pointer to my chunk of data,
I'm passing by reference (the focus being on the data, not the actual
parameter). I think millions of other people think that way too since
pass-by-reference has been taught for decades when discussing C, but
apparently that capability never existed.

Hilton


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