Embedded local functions in c#

[Peter Baranyi]

Hi,

I am a newbie in c# development, with Delphi/Pascal background. I am missing
much the ability to create local functions, what are embedded into an other
function. Let me give an example:

private int x ()
{
internal bool z (string s)
{
// do some manipulation here
}
bool a = z("abc");
bool b = z("xyz");
}

Here the z is visible only in the code of x. And, what is important , it can
see all the local functions of x. This means, that you don't have to pass all
the gadgets in the parameter list.
Is there any reason, why is it not implemented in c#?
Thanks:

Peter

[Nicholas Paldino [.NET/C# MVP]]

Peter,

I can't speak for the designers of the language, but IMO, I think that
it doesn't offer much benefit compared to how difficult it would be to
implement (would it be a .NET or a C# feature, implemented with "compliler
trickery")? All in all, something very similar can be implemented with the
languages as they are today.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com
"Peter Baranyi" <Pe**********@discussions.microsoft.com> wrote in message
news:09**********************************@microsof t.com...

Hi,

I am a newbie in c# development, with Delphi/Pascal background. I am
missing
much the ability to create local functions, what are embedded into an
other
function. Let me give an example:

private int x ()
{
internal bool z (string s)
{
// do some manipulation here
}
bool a = z("abc");
bool b = z("xyz");
}

Here the z is visible only in the code of x. And, what is important , it
can
see all the local functions of x. This means, that you don't have to pass
all
the gadgets in the parameter list.
Is there any reason, why is it not implemented in c#?
Thanks:

Peter

[Rico Wind]

"Peter Baranyi" <Pe**********@discussions.microsoft.com> writes:

Hi,

I am a newbie in c# development, with Delphi/Pascal background. I am missing
much the ability to create local functions, what are embedded into an other
function. Let me give an example:

private int x ()
{
internal bool z (string s)
{
// do some manipulation here
}
bool a = z("abc");
bool b = z("xyz");
}

Here the z is visible only in the code of x. And, what is important , it can
see all the local functions of x. This means, that you don't have to pass all
the gadgets in the parameter list.

If you use C# 2.0 this is possible using (not tested):

public class MyClass{
delegate int myDelegate(int i);
private int x ()
{
int testInt = 5;
myDelegate del = myDelegate(int i)
{
testInt = i++;

};
int setAndReturnIncrease = del(10);
}

}
/rw

[Rico Wind]

Rico Wind <us****@rico-wind.dk> writes:

"Peter Baranyi" <Pe**********@discussions.microsoft.com> writes:

Hi,

I am a newbie in c# development, with Delphi/Pascal background. I am missing
much the ability to create local functions, what are embedded into an other
function. Let me give an example:

private int x ()
{
internal bool z (string s)
{
// do some manipulation here
}
bool a = z("abc");
bool b = z("xyz");
}

Here the z is visible only in the code of x. And, what is important , it can
see all the local functions of x. This means, that you don't have to pass all
the gadgets in the parameter list. If you use C# 2.0 this is possible using (not tested):

public class MyClass{
delegate int myDelegate(int i);
private int x ()
{
int testInt = 5;
myDelegate del = myDelegate(int i)
{
testInt = i++;

There should of course be and
return testInt;
here
(even though it dos not make much sense to return a variable that you
have access to:-), but you probably got the idea)

/rw
};
int setAndReturnIncrease = del(10);
}

}
/rw