On Monday, 23 December 2019 at 15:34:13 UTC, Steven Schveighoffer
wrote:
I really appreciate the enthusiasm here, but at the risk of
being cynical, I see little chance that this gets accepted.
Before you spend any time on actual code, a DIP is going to be
required, as this would be a huge change to the language. I'm
sure you have a lot of time, but I don't want you to waste it
on something that is likely to be rejected.
If you still want to proceed, even at the risk of doing a lot
of work for nothing (or at least, a lot of work that ends up
being just on code.dlang.org instead of Phobos), I can tell you
what my plan was:
1. std.stdio.File was going to be set up to source from either
an iopipe-based io subsystem, or a FILE *.
2. The standard handles would be open with the default C FILE *
standard handles as the source/target.
3. Upon using any "d-like" features on a File that is sourced
from a FILE * (i.e. byline), the File would be switched to a
newly-created iopipe-based source. The theory is here, that
once you do something like this, you commit to using D on that,
and I'd much rather use a higher performing subsystem (iopipe
beats Phobos right now by 2x performance). This only counts for
things that make the File unusable on its own anyway. So
writefln and writeln would NOT switch the source, neither would
lockingTextReader/Writer.
4. Any new File that is opened using any constructor other than
passing in a FILE * will be opened with an iopipe source.
5. The iopipe and io subsystems can be used directly instead of
with File, as a lot of times you don't need that overhead.
Let me know if you decide to do this, I can guide you.
-Steve
Pardon my ignorance, but wouldn't the inclusion of a std.io (e.g.
Martin Nowak's io library) into Phobos be an easier and cleaner
move? Other Phobos modules that require std.stdio could be
gradually changed so that they use std.io instead. There would be
the issue of two coexisting IO libraries in std, but issuing some
warnings whenever std.stdio is imported wouldn't be too bad in my
view; that is unless Mr. Bright's opposition is the main blocker.
