Are these just aliases ?
A few docs I've read imply that in certain case they aren't identical.
7  6059 
* Ev********@goog lemail.com:
Are these just aliases ?
No.
A few docs I've read imply that in certain case they aren't identical.
In a template parameter list they are identical, in all other cases they
aren't identical.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
On Mar 19, 11:26 am, "Alf P. Steinbach" <a...@start.now rote:
* EvilOld...@goog lemail.com:
Are these just aliases ?
No.
A few docs I've read imply that in certain case they aren't identical.
In a template parameter list they are identical, in all other cases they
aren't identical.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
Where is typename used other than in a template paramater list?
blangela <Bo***********@ telus.netwrote:
On Mar 19, 11:26 am, "Alf P. Steinbach" <a...@start.now rote:
>In a template parameter list they are identical, in all other cases they
aren't identical.
Where is typename used other than in a template paramater list?
One example is in disambiguating dependant names, e.g.,
template <typename T>
class xyz {
void foo()
{
typename T::x my_x;
}
};
(example modified from http://www.comeaucomputing.com/techt...ates/#typename
which is a handy reference)
--
Marcus Kwok
Replace 'invalid' with 'net' to reply
blangela wrote:
On Mar 19, 11:26 am, "Alf P. Steinbach" <a...@start.now rote:
>* EvilOld...@goog lemail.com:
>>Are these just aliases ?
No.
>>A few docs I've read imply that in certain case they aren't identical.
In a template parameter list they are identical, in all other cases they
aren't identical.
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
Where is typename used other than in a template paramater list?
Consider typename a more generic form to declare template parameters.
Use typename whenever you can instead of class.
Of course when you declare a class data structure, use 'class'. Only
place I am aware of that typename cannot replace class keyword.
Fei
On 19 Mar, 19:19, Fei Liu <fei...@aepnetw orks.comwrote:
Of course when you declare a class data structure, use 'class'. Only
place I am aware of that typename cannot replace class keyword.
Other place is template template params e.g:
// for allocator
#include <memory>
// can't replace 'class' with typename below
template <template<typen ame, typenameclass Seq>
struct F{
template <typename T>
void foo( Seq<T,std::allo cator<T const & seq)
{
std::cout << *seq.begin() <<'\n';
}
};
#include <vector>
#include <iostream>
int main()
{
std::vector<int x;
F<std::vectorf ;
x.push_back(1);
f.foo(x);
}
regards
Andy Little
On 2007-03-19 19:26, Alf P. Steinbach wrote:
* Ev********@goog lemail.com:
>Are these just aliases ?
No.
>A few docs I've read imply that in certain case they aren't identical.
In a template parameter list they are identical, in all other cases they
aren't identical.
There's also a case where you must use class instead of template, I ran
into this some time ago:
template<templa te<typename Tclass U>
--
Erik Wikström
On 2007-03-19 21:42, Erik Wikström wrote:
On 2007-03-19 19:26, Alf P. Steinbach wrote:
>* Ev********@goog lemail.com:
>>Are these just aliases ?
No.
>>A few docs I've read imply that in certain case they aren't identical.
In a template parameter list they are identical, in all other cases they
aren't identical.
There's also a case where you must use class instead of template, I ran
into this some time ago:
template<templa te<typename Tclass U>
I meant 'use class instead of typename'.
--
Erik Wikström This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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