Template type to constant string
Hi, As you know, with Microsoft VS preprocessor operators you can convert a type passed in to a macro to a string. For example: #define TO_STRING( type ) #type I would like to do the same thing with a template type: template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it } Is there something in boost that can facilitate the behavior I'm describing? Thanks.
Maybe you can try with typeid(t_type).name(), included in <typeinfo>. Regards, Olivier 2007/11/5, Robert Dailey <rcdailey@gmail.com>:
Hi,
As you know, with Microsoft VS preprocessor operators you can convert a type passed in to a macro to a string. For example:
#define TO_STRING( type ) #type
I would like to do the same thing with a template type:
template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it }
Is there something in boost that can facilitate the behavior I'm describing? Thanks.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.
Thanks! This seems to work, however looking at the implementation of <typeinfo> I don't see the keyword "typeid" anywhere. Where in the world is it coming from? Is <typeinfo> part of the standard? It's obviously not in STL since it lacks the namespace. I'm a little confused as to where the file comes from, as I've never heard of it before. I'm guessing it is a microsoft specific thing. Let me know. Thanks again. On 11/5/07, Olivier Tournaire <olitour@gmail.com> wrote:
Maybe you can try with typeid(t_type).name(), included in <typeinfo>.
Regards,
Olivier
2007/11/5, Robert Dailey <rcdailey@gmail.com >:
Hi,
As you know, with Microsoft VS preprocessor operators you can convert a type passed in to a macro to a string. For example:
#define TO_STRING( type ) #type
I would like to do the same thing with a template type:
template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it }
Is there something in boost that can facilitate the behavior I'm describing? Thanks.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
Hi, This is not MS specific. It works with many compilers, and at least with gcc (do not remember the exact version). However, I think "name()" return value is not standard and can vary between platforms. Regards 2007/11/6, Robert Dailey <rcdailey@gmail.com>:
Thanks!
This seems to work, however looking at the implementation of <typeinfo> I don't see the keyword "typeid" anywhere. Where in the world is it coming from? Is <typeinfo> part of the standard? It's obviously not in STL since it lacks the namespace. I'm a little confused as to where the file comes from, as I've never heard of it before. I'm guessing it is a microsoft specific thing.
Let me know. Thanks again.
On 11/5/07, Olivier Tournaire <olitour@gmail.com> wrote:
Maybe you can try with typeid(t_type).name(), included in <typeinfo>.
Regards,
Olivier
2007/11/5, Robert Dailey < rcdailey@gmail.com >:
Hi,
As you know, with Microsoft VS preprocessor operators you can convert a type passed in to a macro to a string. For example:
#define TO_STRING( type ) #type
I would like to do the same thing with a template type:
template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it }
Is there something in boost that can facilitate the behavior I'm describing? Thanks.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.
I happen to skim this thread and had a related question.
Maybe you can try with typeid(t_type).name(), included in <typeinfo>.
Is this evaluated at compile time ( I thought the OP said something about macros )? I was looking for template programming ideas and I hit a case where I needed compile-time type information and I didn't know offhand how to do it so I gave up ( for some reason a specialization didn't seem like an easy thing to do). Does anyone have a good reference link on interesting (portable) template programming approaches ? I found a few things on google but nothing stuck me as being a complete reference. Thanks.
From: "Olivier Tournaire" <olitour@gmail.com> Reply-To: boost-users@lists.boost.org To: boost-users@lists.boost.org Subject: Re: [Boost-users] Template type to constant string Date: Tue, 6 Nov 2007 01:53:04 +0100
Hi,
This is not MS specific. It works with many compilers, and at least with gcc (do not remember the exact version). However, I think "name()" return value is not standard and can vary between platforms.
Regards
2007/11/6, Robert Dailey <rcdailey@gmail.com>:
Thanks!
This seems to work, however looking at the implementation of <typeinfo>
I
don't see the keyword "typeid" anywhere. Where in the world is it coming from? Is <typeinfo> part of the standard? It's obviously not in STL since it lacks the namespace. I'm a little confused as to where the file comes from, as I've never heard of it before. I'm guessing it is a microsoft specific thing.
Let me know. Thanks again.
On 11/5/07, Olivier Tournaire <olitour@gmail.com> wrote:
Maybe you can try with typeid(t_type).name(), included in <typeinfo>.
Regards,
Olivier
2007/11/5, Robert Dailey < rcdailey@gmail.com >:
Hi,
As you know, with Microsoft VS preprocessor operators you can
convert
a type passed in to a macro to a string. For example:
#define TO_STRING( type ) #type
I would like to do the same thing with a template type:
template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it }
Is there something in boost that can facilitate the behavior I'm describing? Thanks.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
_________________________________________________________________ See what youre getting into before you go there http://newlivehotmail.com/?ocid=TXT_TAGHM_migration_HM_viral_preview_0507
2007/11/6, Mike Marchywka <marchywka@hotmail.com>:
I happen to skim this thread and had a related question.
Maybe you can try with typeid(t_type).name(), included in <typeinfo>.
Is this evaluated at compile time ( I thought the OP said something about macros )?
No, evaluated at run time I was looking for template programming ideas and I hit
a case where I needed compile-time type information and I didn't know offhand how to do it so I gave up ( for some reason a specialization didn't seem like an easy thing to do).
Does anyone have a good reference link on interesting (portable) template programming approaches ? I found a few things on google but nothing stuck me as being a complete reference.
Thanks.
From: "Olivier Tournaire" <olitour@gmail.com> Reply-To: boost-users@lists.boost.org To: boost-users@lists.boost.org Subject: Re: [Boost-users] Template type to constant string Date: Tue, 6 Nov 2007 01:53:04 +0100
Hi,
This is not MS specific. It works with many compilers, and at least with gcc (do not remember the exact version). However, I think "name()" return value is not standard and can vary between platforms.
Regards
2007/11/6, Robert Dailey <rcdailey@gmail.com>:
Thanks!
This seems to work, however looking at the implementation of
<typeinfo> I
don't see the keyword "typeid" anywhere. Where in the world is it coming from? Is <typeinfo> part of the standard? It's obviously not in STL since it lacks the namespace. I'm a little confused as to where the file comes from, as I've never heard of it before. I'm guessing it is a microsoft specific thing.
Let me know. Thanks again.
On 11/5/07, Olivier Tournaire <olitour@gmail.com> wrote:
Maybe you can try with typeid(t_type).name(), included in
<typeinfo>.
Regards,
Olivier
2007/11/5, Robert Dailey < rcdailey@gmail.com >:
Hi,
As you know, with Microsoft VS preprocessor operators you can
convert
a type passed in to a macro to a string. For example:
#define TO_STRING( type ) #type
I would like to do the same thing with a template type:
template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it }
Is there something in boost that can facilitate the behavior I'm describing? Thanks.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
_________________________________________________________________ See what you're getting into…before you go there http://newlivehotmail.com/?ocid=TXT_TAGHM_migration_HM_viral_preview_0507
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.
The solution proposed here is by no means perfect, because if for any reason I wasn't using RTTI in my application this method wouldn't be acceptable. However, I suppose I got lucky. I think it would be useful to find a compile-time alternative to converting a type to a string. The second reason why the typeid() approach isn't perfect is because it contains the entire decorated name in the string. In other words, for a class named "CFooSomeClass" the string returned by typeid( CFooSomeClass).name() is "class CFooSomeClass" instead of just "CFooSomeClass". I'm using typeid() as a hack/workaround at the moment until I find something I'm satisfied with being a permanent solution. I'd appreciate it if you guys would continue throwing thoughts at this thread so I can check up on it and maybe get some more ideas. So far this thread has been a bit off topic in that we've not really utilized boost at all. Perhaps this is a hint that boost could excel in this area (assuming it hasn't already)? Maybe there's something boost can do for me that would help out? I'll review the MPL portion of boost and see what I can dig up. Thanks again for everyone's help, I really do appreciate the quick responses! On 11/6/07, Olivier Tournaire <olitour@gmail.com> wrote:
2007/11/6, Mike Marchywka <marchywka@hotmail.com>:
I happen to skim this thread and had a related question.
Maybe you can try with typeid(t_type).name(), included in <typeinfo>.
Is this evaluated at compile time ( I thought the OP said something about macros )?
No, evaluated at run time
I was looking for template programming ideas and I hit
a case where I needed compile-time type information and I didn't know offhand how to do it so I gave up ( for some reason a specialization didn't seem like an easy thing to do).
Does anyone have a good reference link on interesting (portable) template programming approaches ? I found a few things on google but nothing stuck me as being a complete reference.
Thanks.
From: "Olivier Tournaire" < olitour@gmail.com> Reply-To: boost-users@lists.boost.org To: boost-users@lists.boost.org Subject: Re: [Boost-users] Template type to constant string Date: Tue, 6 Nov 2007 01:53:04 +0100
Hi,
This is not MS specific. It works with many compilers, and at least with gcc (do not remember the exact version). However, I think "name()" return value is not standard and can vary between platforms.
Regards
2007/11/6, Robert Dailey <rcdailey@gmail.com>:
Thanks!
This seems to work, however looking at the implementation of
<typeinfo> I
don't see the keyword "typeid" anywhere. Where in the world is it coming from? Is <typeinfo> part of the standard? It's obviously not in STL since it lacks the namespace. I'm a little confused as to where the file comes from, as I've never heard of it before. I'm guessing it is a microsoft specific thing.
Let me know. Thanks again.
On 11/5/07, Olivier Tournaire <olitour@gmail.com> wrote:
Maybe you can try with typeid(t_type).name(), included in
<typeinfo>.
Regards,
Olivier
2007/11/5, Robert Dailey < rcdailey@gmail.com >:
Hi,
As you know, with Microsoft VS preprocessor operators you can
convert
a type passed in to a macro to a string. For example:
#define TO_STRING( type ) #type
I would like to do the same thing with a template type:
template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it }
Is there something in boost that can facilitate the behavior I'm describing? Thanks.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
_________________________________________________________________ See what you're getting into…before you go there http://newlivehotmail.com/?ocid=TXT_TAGHM_migration_HM_viral_preview_0507
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
Hi Mike, On 11/6/07, Mike Marchywka <marchywka@hotmail.com> wrote:
Does anyone have a good reference link on interesting (portable) template programming
The book "Modern C++ Programming". Copy/paste the quoted string in the google and you'll get the book's link for Amazon. -- Regards, Asif
One additional issue. If I pass in a class type: template< typename t_type > void to_string() { return typeid( t_type ).name(); } to_string<CFooClass>(); Output yields: "class CFooClass" I expected just: "CFooClass" On 11/5/07, Olivier Tournaire <olitour@gmail.com> wrote:
Maybe you can try with typeid(t_type).name(), included in <typeinfo>.
Regards,
Olivier
2007/11/5, Robert Dailey <rcdailey@gmail.com >:
Hi,
As you know, with Microsoft VS preprocessor operators you can convert a type passed in to a macro to a string. For example:
#define TO_STRING( type ) #type
I would like to do the same thing with a template type:
template< typename t_type > void TO_STRING() { // Do something here with t_type to make it a string and then return it }
Is there something in boost that can facilitate the behavior I'm describing? Thanks.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
-- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
participants (4)
-
Asif Lodhi -
Mike Marchywka -
Olivier Tournaire -
Robert Dailey