• Peter Campbell (14/14) Oct 13 2016 Good evening all, I'm just starting to learn D and I've been
• ketmar (3/3) Oct 13 2016 sadly, gdc has way older frontend version than ldc (and dmd, of
• Peter Campbell (5/8) Oct 13 2016 OK that's cool, I'll just avoid GDC for now. Is it generally a
• ketmar (6/10) Oct 13 2016 mostly yes. btw, ldc has devbuilds available from it's github

Peter Campbell <peter spcampbell.co.uk> writes:

Good evening all, I'm just starting to learn D and I've been 
experimenting with some template stuff as well as checking out 
DMD, GDC and LDC. During my experimentation I found a piece of 
code that doesn't compile in GDC but does compile in DMD and LDC. 
The code snippet can be found here: http://dpaste.com/1BCVKSW

Basically it's a 3D vector with some enums that reference the 
structure itself. In GDC produces the following errors:

Line 9: error: cannot create a struct until its size is determined
Line 19: error: template instance Vector3.Vector3T!float error 
instantiating

I've seen this error in C++ before and I believe it's illegal 
behaviour in C++ land. In regard to D, both DMD and LDC seem to 
believe it's legal syntax and allow me to use it without problems.

Have I found a bug with GDC or should I not be able to do this?

ketmar <ketmar ketmar.no-ip.org> writes:

sadly, gdc has way older frontend version than ldc (and dmd, of 
course). gdc is like 2.067, and ldc/dmd is 2.072. that this was 
fixed in later versions, but gdc is not updated yet.

Peter Campbell <peter spcampbell.co.uk> writes:

On Thursday, 13 October 2016 at 20:18:31 UTC, ketmar wrote:
 sadly, gdc has way older frontend version than ldc (and dmd, of 
 course). gdc is like 2.067, and ldc/dmd is 2.072. that this was 
 fixed in later versions, but gdc is not updated yet.

OK that's cool, I'll just avoid GDC for now. Is it generally a 
good approach to assume if something compiles in DMD then it's 
correct and just hope that GDC/LDC pick up the latest version at 
some point?

ketmar <ketmar ketmar.no-ip.org> writes:

On Thursday, 13 October 2016 at 20:22:51 UTC, Peter Campbell 
wrote:
 OK that's cool, I'll just avoid GDC for now. Is it generally a 
 good approach to assume if something compiles in DMD then it's 
 correct and just hope that GDC/LDC pick up the latest version 
 at some point?

mostly yes. btw, ldc has devbuilds available from it's github 
page, those are usually on par with current dmd.

it is very sad that gdc has so little manpower, tho. Iain doing a 
great job, but...