Windows (msvc++) support? about sqlpp11 HOT 10 CLOSED

Hi,

I'd like to support MSVC and I'd like MSVC to support sqlpp11 :-) In other words: I'd certainly make small adjustments where necessary and justified, but I am not going to bend over backwards and use tons of #ifdef statements, for instance.

Admittedly, I haven't looked into it since September 2014. At that time, I could not even use sqlpp::wrong_t. And some default constructors were missing...

I am willing to give it another try, of course. Do you know if there is an online version of CTP 6, that I could use for experiments?

Best,

Roland

from sqlpp11.

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On 04/26/2015 11:06 AM, Roland Bock wrote:

Hi,

I'd like to support MSVC and I'd like MSVC to support sqlpp11 :-)
In other words: I'd certainly make small adjustments where
necessary and justified, but I am not going to bend over backwards
and use tons of #ifdef statements, for instance.

Admittedly, I haven't looked into it since September 2014. At that
time, I could not even use sqlpp::wrong_t. And some default
constructors were missing...

I am willing to give it another try, of course. Do you know if
there is an online version of CTP 6, that I could use for
experiments?

I am not aware of any online versions. I have installed CTP 6 in a VM
running a preview of Windows 10.

Jarle

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from sqlpp11.

Have you tried to compile it? What is the first compiler error message you get?

Roland

PS: I'll try to set up a VM myself but it will take some time. I have a lot on my table these days...

from sqlpp11.

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On 04/26/2015 04:38 PM, Roland Bock wrote:

Have you tried to compile it? What is the first compiler error
message you get?

I have not tried to compile it yet. I was just looking around for a
database library for a project I'll work on this spring.

I'll give it a try under Windows next week.

Jarle

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from sqlpp11.

Looking forward to seeing the results!

from sqlpp11.

I gave it a try today. It seems like msvc still have some problems with modern code. There was lot's of errors - but the majority seemed to originate in the constexpr here:

Severity Description Project File Line
Error error C2864: 'sqlpp::alias::a_t::_alias_t::_literal': a static data member with an in-class initializer must have non-volatile const integral type BooleanExpressionTest alias_provider.h 67
Error error C2070: 'const char []': illegal sizeof operand BooleanExpressionTest alias_provider.h 67
Error error C2970: 'sqlpp::make_char_sequence': template parameter 'Input': '_literal': an expression involving objects with internal linkage cannot be used as a non-type argument BooleanExpressionTest alias_provider.h 67
Error error C2440: 'specialization': cannot convert from 'int' to 'const char (&)[0]' BooleanExpressionTest alias_provider.h 67
Error error C2864: 'sqlpp::alias::b_t::_alias_t::_literal': a static data member with an in-class initializer must have non-volatile const integral type BooleanExpressionTest alias_provider.h 68
Error error C2070: 'const char []': illegal sizeof operand BooleanExpressionTest alias_provider.h 68
Error error C2970: 'sqlpp::make_char_sequence': template parameter 'Input': '_literal': an expression involving objects with internal linkage cannot be used as a non-type argument BooleanExpressionTest alias_provider.h 68
Error error C2440: 'specialization': cannot convert from 'int' to 'const char (&)[0]' BooleanExpressionTest alias_provider.h 68

May be it's best to give Microsoft some more time (a year or five) to catch up with the standard... They have always lagged far behind, and put damaging constraints on lots and lots of projects that relies on their compilers. (I suffer from that nearly every time I touch commercial code).

from sqlpp11.

Thanks for the report!

As of now, I do not see a good way to replace that constexpr with something else that give the same level of name safety while keeping the code lean...

The annoying thing is that the same line outside a struct works fine (tested here: http://webcompiler.cloudapp.net/)

I'll file a bug with MS and close this ticket for now.

Best,

Roland

from sqlpp11.

Were you able to try VS 2015 RC?

from sqlpp11.

I tried VS 2015 RC yesterday. Still no luck. I hoped that the newly announced clang front-end may be able to work around the limitations in msvc++, but I could not find a way to enable it for native code. I asked if that can be done is a msdn forum - but no replies yet.

from sqlpp11.

Thanks for the update! Also nothing on the bug I filed...

from sqlpp11.