Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
9  3419 
On 21 Sep, 12:31, lucifer <umeshktan...@g mail.comwrote:
Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
It makes it logically inline, in that you won't get multiple
definition link errors, but it's up to the compiler whether it is
actually physically inlined into the code.
If the function is virtual and coded inside the class definition it's
almost certain it won't be inlined in reality because at the point of
call it might not be this particular implementation that is going to
be invoked.
On Sep 21, 1:31 pm, lucifer <umeshktan...@g mail.comwrote:
Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
It's the same as if you defined the function with the inline keyword
outside of the class. Whether this results in the function being
inlined is up to the compiler.
On 2007-09-21 07:31:13 -0400, lucifer <um**********@g mail.comsaid:
Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
The standard says: "A function defined within a class definition is an
inline function." [dcl.fct.spec]/3.
--
Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
( www.petebecker.com/tr1book)
On Sep 21, 2:31 pm, lucifer <umeshktan...@g mail.comwrote:
Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
It depends. C++ standard does not guarantee that function or method
will be inlined. In other words, "inline" keyword is just a suggestion
to your compiler. For example, some compilers may inline function or
method even without that keyword when optimizing your code.
On Sep 21, 2:31 pm, lucifer <umeshktan...@g mail.comwrote:
Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
Here is what parashift says:
When you declare an inline member function, it looks just like a
normal member function:
class Fred {
public:
void f(int i, char c);
};
But when you define an inline member function, you prepend the member
function's definition with the keyword inline, and you put the
definition into a header file:
inline
void Fred::f(int i, char c)
{
...
}
It's usually imperative that the function's definition (the part
between the {...}) be placed in a header file. If you put the inline
function's definition into a .cpp file, and if it is called from some
other .cpp file, you'll get an "unresolved external" error from the
linker.
On 2007-09-21 10:15:38 -0400, "D. Susman" <de**********@g mail.comsaid:
On Sep 21, 2:31 pm, lucifer <umeshktan...@g mail.comwrote:
>Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
Here is what parashift says:
When you declare an inline member function, it looks just like a
normal member function:
That's one way to declare an inline member function, but it's not the
only way. As I mentioned earlier, defining the function inside the
class definition also makes it inline.
--
Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
( www.petebecker.com/tr1book)
lucifer wrote:
Hi
I have a little problem regarding inline functions ,does declaring a
function inside the class definition make it inline or not.
Depends on what you mean by "makes it inline". If you mean if it's
equivalent to an inline defined function then yes. If you mean if that
actually makes the compiler inline the function (ie put its code at the
call place instead of actually calling it) then you don't know. AFAIK the
ISO C++ standard does not guarantee any inlining taking place in either
case (having the function definition in the class definition or as an
inline definition).
In practice, if using a modern compiler AND compiling with optimization AND
if the function is "small enough" then it should be inlined.
--
Dizzy Vl************* ****@gmail.com wrote:
It depends. C++ standard does not guarantee that function or method
will be inlined. In other words, "inline" keyword is just a suggestion
to your compiler. For example, some compilers may inline function or
method even without that keyword when optimizing your code.
'inline' has to do with linking, and yes, a function implemented in
the declaration of the class is inline. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Grumble |
last post by:
Hello everyone,
As far as I understand, the 'inline' keyword is a hint for the compiler
to consider the function in question as a candidate for inlining, yes?
What happens when a function with extern linkage is inlined? Should the
compiler still export the function?
Or is an inlined function implicitly static?
|
by: Tony Johansson |
last post by:
Hello experts!
I'm reading a book about C++ and there is something about inline that the
book says that is unclear for me.
The book says the following "Because inline functions are expanded at
compile time, definitions of these
functions, unlike other definitions, cannot be separately compiled and must
be placed in header files.
This creates a problem if the compiler does not actually inline a
|
by: Tony Johansson |
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Hello experts!
I reading a book called programming with design pattern revealed
by Tomasz Muldner and here I read something that sound strange.
Here is the whole section:
It says" Because inline functions are expanded at compile time, definitions
of these
functions, unlike other definitions cannot be separately compiled and must
be
|
by: John Ratliff |
last post by:
Can the compiler ever inline a method when there is a pointer to the
member used?
Thanks,
--John Ratliff
|
by: Wu Shaohua |
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Hi Guys,
1. As we know usually we should not define a constructor as inline. I also
learned if we define a member function inside the class this member function
will be automatically be inline'ed. My question is:
If I define a constructor (including its body) or another large member
function inside the class, the constructor or the member function is inline
or not? why?
2. I learned that if the member function is big we should not...
| | |
by: ypjofficial |
last post by:
Hello All,
Inline before a function definition is just a request to the compiler
to make the function inline.
The compiler may or maynot make it inline..
My question is ..is there any way by which I can find at runtime
whether the particular function which is marked as inline,is made
inline or is treated like other function by the compiler ?
|
by: toton |
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Hi,
As inline is not mandetory, it depends on compiler to inline certain
function (or using switch like fior GCC), my question is there any
scope for inlining when it is not declared as inline function?
i.e compiler may choose not to inline certain inline function, but is
it free to choose a non inline function to inline it?
I have some simple one line get function, and index operators which I
want to get inlined. But due to some problem...
|
by: sam_cit |
last post by:
Hi Everyone,
I have few questions on inline functions, when i declare a function as
inline, is it for sure that the compiler would replace the function
call with the actual body of the function? or is it a call taken by
compiler?
Second, i see that it is same as what Macro's used to do for c, if so
what is the advantage for going in for inline functions than to Macros?
|
by: jg |
last post by:
Does C++ standard require an inline function be generated all the
time ?
For example,
#include <iostream>
using namespace std;
inline int foo()
{
|
by: Laurent Deniau |
last post by:
When I compile the code below with gcc -std=c99 -W -Wall -pedantic -O3
-Winline, it reports the following:
variadic.c: In function ‘fv’:
variadic.c:12: warning: function ‘fv’ can never be inlined because it
uses variable argument lists
variadic.c: In function ‘vf’:
variadic.c:12: warning: inlining failed in call to ‘fv’: function not
inlinable
variadic.c:27: warning: called from here
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