How to use tr1 with Visual Studio 2010 (tr1::function)?

Question

How does one start using the tr1 features of Visual Studio 2010? For a more specific case, I require the std::tr1::function. I tried including #include <tr1/functional> which reports as missing, while #include <functional> includes fine, but when I set this:

std::tr1::function<void(void)> callback;

I get:

1>d:\marmalade\projects\core\src\button.h(21): error C3083: 'tr1': the symbol to the left of a '::' must be a type
1>d:\marmalade\projects\core\src\button.h(21): error C2039: 'function' : is not a member of '_STL'
1>d:\marmalade\projects\core\src\button.h(21): error C2143: syntax error : missing ';' before '<'
1>d:\marmalade\projects\core\src\button.h(21): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>d:\marmalade\projects\core\src\button.h(21): error C2238: unexpected token(s) preceding ';'

If I use boost, it works fine, but for this project, because of using a specific framework I'd require the Visual Studio tr1 version.

As suggested, skipping the tr1, still returns the same result:

std::function<void(void)> callback;

1>d:\marmalade\projects\core\src\button.h(20): error C2039: 'function' : is not a member of '_STL'
1>d:\marmalade\projects\core\src\button.h(20): error C2143: syntax error : missing ';' before '<'
1>d:\marmalade\projects\core\src\button.h(20): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>d:\marmalade\projects\core\src\button.h(20): error C2238: unexpected token(s) preceding ';'

Licastro

tr1 stands for Technical Report 1 which was a list of proposed additions to the C++ Standard. Once the proposals were accepted, the tr1 designation became obsolete. – June

did you include <functional>? – Etamine

The error says functional is not a member of _STL. Are you sure you wrote std::function, and not std::functional? – Joaquin

Copied the wrong error. I tried both versions, both with the same result. – Licastro

@Licastro : Do you have #define std _STL somewhere? Because that error makes no sense for the code you've shown. – Kohn

No, I do not. However if I put that in, I get a completely third error saying I am redefining std. – Licastro

@Speed: Works for everyone else: ideone.com/9gd3N, there's something missing that you haven't told us. Especially since your compiler seems to think someone redefined std as a variable of type _STL. – Etamine

It may be the library. I am using a library called Marmalade with it. It may tinker with the settings of the project... – Licastro

Comment out all the includes except functional includes, and see if the errors go away on the line with the std::function. If so, you know it's a header causing the problem. – Etamine

@Licastro If you put that macro in and get an error that you're redefining std, that means someone, somewhere already does #define std. Put #undef std after your includes, then find and shoot whoever defined std as a macro. – Kohn

to help with ildjarn's guess: CTRL+SHIFT+F. Find: "define std", Look in: "Entire Solution" – Etamine

There is no matches as I do not do that in the code. I think the library madewithmarmalade.com is using a modified compiler... – Licastro

@Licastro : Did you or did you not try #undef std? – Kohn

@Speed: Did you try commenting out various headers to see which is causing the functional issue? – Etamine

undefining std breaks strings and vectors. Marmalade tinkers with those classes. I am sure of it... – Licastro

@Speed: madewithmarmalade.com/marmalade/benefits/… says they compile with Visual C++ – Etamine

They do, but the Visual Studio project gets generated by their bat file. – Licastro

waaaaaiiiit, Does Marmalade provide it's own standard library? I think it does. That would explain the lack of newer features, like function. – Etamine

madewithmarmalade.com/devnet/forum/4994 I guess so. – Licastro

I'll try taking the std::function files and put them directly into my source folder... Thank you for your time :( – Licastro

Answer 1

Based on your comments, and on this page, I think that Marmalade comes with it's own STL implementation, that appears out of date. This page verifies that they use a version of STLPort, that does not support the TR1 that came out in 2005, much less anything newer. Your options are:

1) Copy/write those yourself
2) Do without
3) Download a newer version of STLPort. It doesn't seem to have been updated in the last two years, so no C++11, but they do mention having functional, but aren't clear as to if it's in the std or std::tr1 namespace. However, this might not work with Marmalade, so make backups and be careful.

Etamine

I think it's just bundled with STLPort (source)... Terrible. – Kohn

@Speed: Updated answer, a newer version of STLPort may or may not help you. – Etamine

Thank you for the extended help. I really appreciate it! – Licastro

Why on earth would you a library do something like that? – Gosh

Answer 2

Visual Studio 2010 ships with C++11 enabled by default (or at least what is implemented). You need to use std::function<void(void)>.

For a complete table see here.

As an aside: You shouldn't use anything from TR1 nowadays. It has been integrated into the new standard.

Gosh

Regardless, I still get the exact same error. std::function<void(void)> callback; returns the exact error, without the first one: error C2039: 'function' : is not a member of '_STL' – Licastro

@Licastro This looks highly suspicious. grep for any strange defines. – Gosh