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About 260 results for
rvalue
- Page 1
Re: rvalue reference won't invoke move constructor
Programming
Software Development
10 Years Ago
by mike_2000_17
…'s a temporary object, i.e., an
rvalue
, which will bind (preferrably) to an
rvalue
-reference, leading to the use of move…. So, if you pass a temporary object (pure
rvalue
) or if you pass an
rvalue
-reference (e.g., from using `std::move…
Re: rvalue reference won't invoke move constructor
Programming
Software Development
10 Years Ago
by mike_2000_17
…. Normally, a move-constructor is created with a non-const
rvalue
reference (i.e., with `A&&` not `const A… only real purpose that a const
rvalue
reference has is to prevent a const
rvalue
from binding to a const lvalue reference…
rvalue reference won't invoke move constructor
Programming
Software Development
10 Years Ago
by Kristian_2
…()); // This should invoke move constructor because this object here is
rvalue
right? } Output is: 2 1 Sadly it should be: 2…
Re: how could I pass literal as rvalue reference?
Programming
Software Development
12 Years Ago
by Narue
Visual C++ 2010 doesn't support the current rules for
rvalue
references (specifically the allowance for implicit conversions). The way to do it presently in 2010 is by creating a temporary
rvalue
string object: [code] test_rr(std::string("this is")); [/code] Visual C++ 2011 supposedly supports the current
rvalue
reference rules.
Re: Lvalue and Rvalue error ...
Programming
Software Development
17 Years Ago
by himanjim
[QUOTE=joshilay]hi ... can anyone please tell what are Lvalue and
Rvalue
errors in c and c++ ???[/QUOTE] Lvalue means location value. And
Rvalue
means read value. Suppose the code is int i; i=5; here i is lvalue and 5 is
Rvalue
. the code 5=i; generates error lvalue required.
how could I pass literal as rvalue reference?
Programming
Software Development
12 Years Ago
by stereomatching
… &&lvalue) { std::cout<<"this is
rvalue
"<<std::endl; } int main() { test_rr("this…; } [/code] how could I treat "this is" as
rvalue
reference? The easiest way I could think is [code] std…
Re: std::tuple and boost::tuple don't support rvalue reference?
Programming
Software Development
12 Years Ago
by stereomatching
[QUOTE=;][/QUOTE] I just test it on gcc4.6.2 looks like the tuple of gcc4.6.2 support
rvalue
reference but visual c++ do not I hope that visual c++ could support variadic template and support
rvalue
reference better ASAP
Lvalue and Rvalue error ...
Programming
Software Development
17 Years Ago
by joshilay
hi ... can anyone please tell what are Lvalue and
Rvalue
errors in c and c++ ???
Re: Lvalue and Rvalue error ...
Programming
Software Development
17 Years Ago
by Grunt
@joshilay I don't think you get
rvalue
required errors.
Re: Lvalue and Rvalue error ...
Programming
Software Development
17 Years Ago
by ~s.o.s~
[quote=Grunt]@joshilay I don't think you get
rvalue
required errors.[/quote] Maybe he just wanted to know the difference between the L and R values ?
Question about rvalue reference
Programming
Software Development
13 Years Ago
by stereomatching
… && should be able to swallow the lvalue and
rvalue
That means I could write something like this [code] void…
Re: Question about rvalue reference
Programming
Software Development
13 Years Ago
by vijayan121
Use std::move to convert the lvalue reference to an
rvalue
reference. see: [url]http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2027.html#Move_Semantics[/url] > Maybe this? [ICODE]testPF(std::move(a), std::move(b) ) ;[/ICODE] Yes.
Re: Question about rvalue reference
Programming
Software Development
13 Years Ago
by stereomatching
… my understanding, I can't gain benefit from POD with
rvalue
reference [code] #include<vector> struct Point { int x…
std::tuple and boost::tuple don't support rvalue reference?
Programming
Software Development
12 Years Ago
by stereomatching
…; > move_tuple( strShared ); [/code] Do C++11 make tuple assist
rvalue
reference? Thanks
lvalue and rvalue
Programming
Software Development
11 Years Ago
by shanki himanshu
what is lvalue and
rvalue
? please explain with simple example.
Re: rvalue reference won't invoke move constructor
Programming
Software Development
10 Years Ago
by Ancient Dragon
The way I understand it your move constructor is not correct. The intent of the move constructure is to move data objects from one class to another, not to mearly assign a value to the current class. See [this article ](http://msdn.microsoft.com/en-us/library/dd293665.aspx)for full explanation. [Here](http://stackoverflow.com/questions/3106110/…
Re: rvalue reference won't invoke move constructor
Programming
Software Development
10 Years Ago
by Kristian_2
I try to change data so I can see what function was invoked in process. Same as with cout. But whatever I do, I can't call move constructor. :v
Re: rvalue reference won't invoke move constructor
Programming
Software Development
10 Years Ago
by Kristian_2
Awesome, I didn't know that. :)
Re: rvalue reference won't invoke move constructor
Programming
Software Development
10 Years Ago
by Ancient Dragon
I understand why the move constructor is called when a function returns a class, such as CreateA(), but why isn't the move constructor called when a class is passed by value to a function, such as foo(A a)? Aren't they the same?
Re: how could I pass literal as rvalue reference?
Programming
Software Development
12 Years Ago
by sundip
I am completely unable to understand what you wants to do ?
Re: how could I pass literal as rvalue reference?
Programming
Software Development
12 Years Ago
by stereomatching
Thanks, maybe we have to wait for five years before most of the main stream compilers could support c++11
Re: how could I pass literal as rvalue reference?
Programming
Software Development
12 Years Ago
by Narue
Five years might be a little pessimistic. Though for Visual C++ you'll probably have to wait until the version after 2011 for more complete conformance[1]. GCC is the closest that I'm aware of presently, so if you want to play with C++11 you should hop over there. [1] Some of the most anticipated features (eg. variadic templates) still aren't …
Re: how could I pass literal as rvalue reference?
Programming
Software Development
12 Years Ago
by stereomatching
[QUOTE=;][/QUOTE] [code]Some of the most anticipated features (eg. variadic templates) still aren't implemented because "it's difficult"[/code] This is one of the useful feature of c++11, we don't need to use some "horrible" work around to mimic it again I don't know how of those work around work But I am pretty appreciate …
Re: Lvalue and Rvalue error ...
Programming
Software Development
17 Years Ago
by Salem
Like [inlinecode]3 = myVariable;[/inlinecode] Will generate an lvalue error, because you can't assign to a numeric constant. You can't assign to a function, or assign to an array either.
Re: Lvalue and Rvalue error ...
Programming
Software Development
17 Years Ago
by ~s.o.s~
Yes what Mr. Salem has said is perfect and if you want a more detailed account then you can try here. [URL="http://msdn2.microsoft.com/en-us/library/bkbs2cds.aspx"]http://msdn2.microsoft.com/en-us/library/bkbs2cds.aspx[/URL] Hope it helped, bye.
Re: Question about rvalue reference
Programming
Software Development
13 Years Ago
by Insensus
Maybe this? [CODE=c++]testPF(std::move(a), std::move(b))[/CODE]
Re: std::tuple and boost::tuple don't support rvalue reference?
Programming
Software Development
12 Years Ago
by vijayan121
The absence of variadic templates is the fundamental problem with Microsoft C++. It surfaces in several different places posing as different problems. This is (in effect) what the IS says: [CODE]template< typename... TYPES > tuple<TYPES...> std::make_tuple( TYPES&&... args ) ; returns std::tuple<TYPES...>( std::…
Re: std::tuple and boost::tuple don't support rvalue reference?
Programming
Software Development
12 Years Ago
by stereomatching
[QUOTE=;][/QUOTE] I test some of your codes on [url]http://www.daniweb.com/software-development/cpp/threads/392114[/url] it works!!!Variadic template is too powerful Now I am thinking how to implement IndexOf by it Why standard committee didn't add this feature into C++03? Because the technique was not yet mature? Or TMP was too advanced …
Re: lvalue and rvalue
Programming
Software Development
11 Years Ago
by rithish
http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=%2Fcom.ibm.xlcpp8a.doc%2Flanguage%2Fref%2Flvalue.htm
Getting Fatal error
Programming
Web Development
9 Years Ago
by GingerDontCare
…($num1, $num2) { $
rValue
= $num1 + $num2; return $
rValue
; } public function subtract($num1, $num2) { $
rValue
= $num1 - $num2; return $
rValue
; } public function multiply($num1, $num2) { $
rValue
= $num1 * $num2…
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