Basic C++ questions

1. How many types of copy constructor in C++?

2. Will compiler-generated copy constructor do bitwise or memberwise
copying?

webfan wrote:

Quote:

1. How many types of copy constructor in C++?
>
2. Will compiler-generated copy constructor do bitwise or memberwise
copying?

Guessing from 2, the answer to 1 is "compiler-generated or
programmer-supplied."

The answer to 2 is "memberwise".

Is this for a quiz or something?

--
Phlip
http://www.greencheese.us/ZeekLand <-- NOT a blog!!!

webfan wrote:

Quote:

1. How many types of copy constructor in C++?

If you refer to possible signatures, then two.

Quote:

2. Will compiler-generated copy constructor do bitwise or memberwise
copying?

The latter. What book are you reading that doesn't explain those
basic elements of the language?

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

Quote:

1. How many types of copy constructor in C++?
>
2. Will compiler-generated copy constructor do bitwise or memberwise
copying?

Is homework of you?

Victor Bazarov wrote:

Quote:

webfan wrote:

Quote:

>1. How many types of copy constructor in C++?

>
If you refer to possible signatures, then two.

Actually, it can be more. You can have defaulted
args for the other parameters.

Quote:

>

Quote:

>2. Will compiler-generated copy constructor do bitwise or memberwise
>copying?

>
The latter. What book are you reading that doesn't explain those
basic elements of the language?
>

Nothing trully works "bitwise" in C++. The smallest unit of
operation is a byte.

Ron Natalie wrote:

Quote:

Victor Bazarov wrote:

Quote:

>webfan wrote:

Quote:

>>1. How many types of copy constructor in C++?

>>
>If you refer to possible signatures, then two.

>
Actually, it can be more. You can have defaulted
args for the other parameters.
>

Quote:

>>

Quote:

>>2. Will compiler-generated copy constructor do bitwise or memberwise
>>copying?

>>
>The latter. What book are you reading that doesn't explain those
>basic elements of the language?
>>

Nothing trully works "bitwise" in C++. The smallest unit of
operation is a byte.

I think & and | and ^ operators work bitwise in C++. That's why they
are called bitwise.

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

Quote:

>>>

>Nothing trully works "bitwise" in C++. The smallest unit of
>operation is a byte.

>
I think & and | and ^ operators work bitwise in C++. That's why they
are called bitwise.
>

But they work on something no smaller than a char.

Actually, with bitfields you can get to smaller items than a char,
but in general bytes are the smallest entity.

Ron Natalie wrote:

Quote:

Victor Bazarov wrote:

Quote:

>webfan wrote:

[snip]

Quote:

>>2. Will compiler-generated copy constructor do bitwise or memberwise
>>copying?

>>
>The latter. What book are you reading that doesn't explain those
>basic elements of the language?
>>

Nothing trully works "bitwise" in C++. The smallest unit of
operation is a byte.

I think, under the as-if rule, an implementation is allowed to copy,say, a
char or an unsigned int bitwise as long as it makes sure that at the end,
all bits have been copied :-)

Best

Kai-Uwe Bux

Ron Natalie wrote:

Quote:

>

Quote:

>>>>
>>Nothing trully works "bitwise" in C++. The smallest unit of
>>operation is a byte.

>>
>>
>I think & and | and ^ operators work bitwise in C++. That's why they
>are called bitwise.
>>

>
But they work on something no smaller than a char.
>
Actually, with bitfields you can get to smaller items than a char,
but in general bytes are the smallest entity.

No bird is as small as a fly-bird. Actually, some fly-birds are as
small, but in general birds are bigger than fly-birds.

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