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alex24
New Member
8 Posts |
 Posted - Aug 28 2014 : 08:28:40 AM
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I'm using vc6, vax 10.8.2043.0.
and gcc-4.9.1(mingw64) with option -fms-extensions to compile the below code.
It seems VAX has no idea about the nameless "struct aaa;" in struct bbb#12290;
static void foobar()
{
struct aaa{
int base_a;
int base_b;
};
struct bbb{
struct aaa;
int a;
int b;
}x;
x.base_a;
x.base_b;
x.a;
}
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alex24
New Member
8 Posts |
Posted - Aug 28 2014 : 08:32:44 AM
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| VS2008 VS2010 also enable to compile this code. |
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accord
Whole Tomato Software
United Kingdom
3287 Posts |
Posted - Aug 28 2014 : 7:13:40 PM
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That is a type name, a forward declaration, hence it's missing from the listbox.
Intellisense doesn't like it and cannot compile it either:
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alex24
New Member
8 Posts |
Posted - Aug 28 2014 : 7:57:50 PM
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quote:
Originally posted by accord
That is a type name, a forward declaration, hence it's missing from the listbox.
Intellisense doesn't like it and cannot compile it either:
struct aaa{
int base_a;
int base_b;
};
struct bbb{
struct aaa;
int a;
int b;
}x;
is same as below code.
struct bbb{
struct {
int base_a;
int base_b;
};
int a;
int b;
}x;
It's not a forward declaration.
You can not use "x.aaa;", but you can use "x.base_a;".
See here:
GCC https://gcc.gnu.org/onlinedocs/gcc/Unnamed-Fields.html
VS support it by default.
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accord
Whole Tomato Software
United Kingdom
3287 Posts |
Posted - Aug 31 2014 : 6:07:29 PM
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>VS support it by default.
Which version of Visual Studio are you using? (and which update?) |
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accord
Whole Tomato Software
United Kingdom
3287 Posts |
Posted - Sep 01 2014 : 12:04:01 PM
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*ah* I misunderstood your post it seems, you want to use x.base_a, not x.aaa.
I've just installed Visual Studio 2013 Update 3 to see if it makes any different. I have tried both version of your example source and I am getting an error from the compiler and intellisense, see the attached screenshots.
Am I still missing something? |
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feline
Whole Tomato Software
United Kingdom
18750 Posts |
Posted - Sep 01 2014 : 2:48:14 PM
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Your code does not compile for me either. Under Windows 7, I have tried:
VS2008 SP1
VS2010 SP1
VS2012 Update 4
VS2013 Update 3
you say your code compiles in VS2008 and VS2010, what are you doing to the IDE to convince it to compile this code? |
zen is the art of being at one with the two'ness |
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accord
Whole Tomato Software
United Kingdom
3287 Posts |
Posted - Sep 03 2014 : 5:19:19 PM
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| *ah* I missed the post where alex mentioned the VS version. (I wanted to try the latest compiler version so I had installed update 3, since MS improves the compiler even in the updates.) |
Edited by - accord on Sep 03 2014 5:21:09 PM |
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foxmuldr
Tomato Guru
USA
384 Posts |
Posted - Sep 04 2014 : 09:57:46 AM
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quote:
Originally posted by accord
*ah* I missed the post where alex mentioned the VS version. (I wanted to try the latest compiler version so I had installed update 3, since MS improves the compiler even in the updates.)
The OP is compiling with GCC 4.9.1, not Microsoft's compiler. GCC extensions recognize the pass-through token without using the parent aaa by some reference, but the MS compiler requires it.
It will never be recognized by VS and Intellisense (at least not today).
Best regards,
Rick C. Hodgin
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Edited by - foxmuldr on Sep 04 2014 10:18:46 AM |
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feline
Whole Tomato Software
United Kingdom
18750 Posts |
Posted - Sep 04 2014 : 11:43:17 AM
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I noticed that as well, but it is the second post that puzzles me:
quote:
VS2008 VS2010 also enable to compile this code.
Since that is not what I am seeing. |
zen is the art of being at one with the two'ness |
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foxmuldr
Tomato Guru
USA
384 Posts |
Posted - Sep 04 2014 : 4:47:38 PM
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| I think the OP meant "unable to compile." |
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feline
Whole Tomato Software
United Kingdom
18750 Posts |
Posted - Sep 04 2014 : 6:47:46 PM
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| Perhaps, but that does not make much sense, since telling us the code does not compile hardly encourages the idea that VA should support it. The only way this makes sense to me so far is if he is using a different compiler with the IDE, gcc in this case. We need more information. |
zen is the art of being at one with the two'ness |
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foxmuldr
Tomato Guru
USA
384 Posts |
Posted - Sep 04 2014 : 7:36:01 PM
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| I think that's it. He's using VAX in various versions of Visual Studio from VC6 forward, but rather than using the built-in compiler with VS he's using a custom build tool with GCC. The code compiles and runs, but Intellisense is not supporting what the compiler supports (and I think he thinks it should -- I could be wrong though). |
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alex24
New Member
8 Posts |
Posted - Sep 09 2014 : 05:29:01 AM
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Sorry for long time away from this topic.
I'm using C, not CPP. This code works fine with .c suffix. |
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foxmuldr
Tomato Guru
USA
384 Posts |
Posted - Sep 09 2014 : 11:04:44 AM
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After your last post, I tried to get this to compile in GCC and I could not. GCC doesn't recognize it even with the .c extension. It does compile in VS2008 though.
alex24, I am just a user here at Whole Tomato. I read the forums and sometimes post. But, I am curious ... what is your need to write code using this feature? I like the ability it represents. Rather a lot actually. :-) |
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alex24
New Member
8 Posts |
Posted - Sep 09 2014 : 8:12:56 PM
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Am I living in a parallel universe?
Or maybe the vs update change the compiler.
foxmuldr, which version of gcc are you using. I'm using gcc-4.9.1 as below
gcc -fms-extensions xxx.c
-fms-extensions must be enabled.
Since I'm writing C, but not CPP, with this feature I can make my C code style like "CPP Inheritance".
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foxmuldr
Tomato Guru
USA
384 Posts |
Posted - Sep 09 2014 : 10:00:44 PM
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I am using 4.8.1. I forgot to use -fms-extensions. :-) I think it's me living in the parallel universe.
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Topic |
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VAX doesn't list members of a struct as this code
