Hi All,
Microsoft says that structures are value types. Also primitive data types
are value types. And memory for value types is allocated on the stack. Then
why we need new operator to allocate memory for structure value types and not
for primitive data types(they r allocated memory on stack as well)??? Please
help.
Thanks in advance.
Faktujaa
13  2188 
hi
the struct gets allocated on the stack.
What 'new ' does is initialize the value type's fields to null/zero
regards
Ansil
"faktujaa" wrote: Hi All,
Microsoft says that structures are value types. Also primitive data types
are value types. And memory for value types is allocated on the stack. Then
why we need new operator to allocate memory for structure value types and not
for primitive data types(they r allocated memory on stack as well)??? Please
help.
Thanks in advance.
Faktujaa
faktujaa <fa******@discu ssions.microsof t.com> wrote: Microsoft says that structures are value types. Also primitive data types
are value types. And memory for value types is allocated on the stack.
Memory for value types is only allocated on the stack in some cases.
See http://www.pobox.com/~skeet/csharp/memory.html
Then why we need new operator to allocate memory for structure value
types and not for primitive data types(they r allocated memory on
stack as well)??? Please help.
"new" just means "call a constructor". It doesn't have anything to do
with where things are allocated.
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
New has nothing to do with allocation of memory. It is used to call the
constructor.
so by using the new with a structure , you are calling a constructor of the
structure which sets all its members variables to 0, false or null depending
on their type
Nishith Pathak
"Jon Skeet [C# MVP]" wrote: faktujaa <fa******@discu ssions.microsof t.com> wrote: Microsoft says that structures are value types. Also primitive data types
are value types. And memory for value types is allocated on the stack.
Memory for value types is only allocated on the stack in some cases.
See http://www.pobox.com/~skeet/csharp/memory.html
Then why we need new operator to allocate memory for structure value
types and not for primitive data types(they r allocated memory on
stack as well)??? Please help.
"new" just means "call a constructor". It doesn't have anything to do
with where things are allocated.
--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Nishith Pathak <Ni***********@ discussions.mic rosoft.com> wrote: New has nothing to do with allocation of memory. It is used to call the
constructor.
so by using the new with a structure , you are calling a constructor of the
structure which sets all its members variables to 0, false or null depending
on their type
The constructor probably actually sets member variables to *other*
values, actually. It's not much use as a constructor otherwise...
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Thanks for the inputs. Then how does CLR knows that it has to allocate the
memory on stack/heap. By this, i think it determines based on the type
name(class). Actually i was thinking that by creating a variable with new
keyword, we assign the memory on the heap as in C/C++. Anyways thanks for the
help but still the question of how does the CLR knows abt where to allocate
the memory is bothering me. Please help.
Faktujaa
"Jon Skeet [C# MVP]" wrote: Nishith Pathak <Ni***********@ discussions.mic rosoft.com> wrote: New has nothing to do with allocation of memory. It is used to call the
constructor.
so by using the new with a structure , you are calling a constructor of the
structure which sets all its members variables to 0, false or null depending
on their type
The constructor probably actually sets member variables to *other*
values, actually. It's not much use as a constructor otherwise...
--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
On Tue, 26 Oct 2004 08:11:03 -0700, faktujaa wrote: name(class). Actually i was thinking that by creating a variable with new
keyword, we assign the memory on the heap as in C/C++. Anyways thanks for the
Correct me if I'm wrong, but in C++, new is an operator whereas in VB New
is a method name.
--
Chris
dunawayc[AT]sbcglobal_lunch meat_[DOT]net
To send me an E-mail, remove the "[", "]", underscores ,lunchmeat, and
replace certain words in my E-Mail address.
Hi,
Im was not talking of C++ and VB but of C#/VB.NET and C++/VB. Anyways im not
a VB guy so i don't know anything abt it. Also as per microsoft, the new
keyword can be used as an operator or as a modifier in C#. As an operator, is
used to create objects on the heap and invoke constructors. Then by using the
same new operator to create an object of structure type, why do it allocates
the memory on the stack. Any help on this is highly appreciated. Thanks in
advance.
faktujaa
"Chris Dunaway" <"dunawayc[[at]_lunchmeat" wrote: On Tue, 26 Oct 2004 08:11:03 -0700, faktujaa wrote:
name(class). Actually i was thinking that by creating a variable with new
keyword, we assign the memory on the heap as in C/C++. Anyways thanks for the
Correct me if I'm wrong, but in C++, new is an operator whereas in VB New
is a method name.
--
Chris
dunawayc[AT]sbcglobal_lunch meat_[DOT]net
To send me an E-mail, remove the "[", "]", underscores ,lunchmeat, and
replace certain words in my E-Mail address.
faktujaa <fa******@discu ssions.microsof t.com> wrote: Im was not talking of C++ and VB but of C#/VB.NET and C++/VB. Anyways im not
a VB guy so i don't know anything abt it. Also as per microsoft, the new
keyword can be used as an operator or as a modifier in C#. As an operator, is
used to create objects on the heap and invoke constructors. Then by using the
same new operator to create an object of structure type, why do it allocates
the memory on the stack. Any help on this is highly appreciated. Thanks in
advance.
It just creates new instances, wherever they should go. It's as simple
as that.
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
faktujaa <fa******@discu ssions.microsof t.com> wrote: Thanks for the inputs. Then how does CLR knows that it has to allocate the
memory on stack/heap. By this, i think it determines based on the type
name(class). Actually i was thinking that by creating a variable with new
keyword, we assign the memory on the heap as in C/C++. Anyways thanks for the
help but still the question of how does the CLR knows abt where to allocate
the memory is bothering me. Please help.
Did you read the article I linked to? It explains it all there. http://www.pobox.com/~skeet/csharp/memory.html
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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Hi All,
Microsoft says that structures are value types. Also primitive data types
are value types. And memory for value types is allocated on the stack. Then
why we need new operator to allocate memory for structure value types and not
for primitive data types(they r allocated memory on stack as well)??? Please
help.
Thanks in advance.
Faktujaa
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