Is it expected thath D2 will ultimately supersede D1? This is the first
that I've heard of there being a new major revision of the language.
-Adrian
On 10-12-21 02:10 AM, Johannes Pfau wrote:
On 21.12.2010 07:22, Adrian Thurston wrote:
Hi thanks for your patch! I'm hoping to integrate it in the next
couple of weeks. At that time I'll look into the issue of dynamic
arrays that you pointed out.
Regards,
Adrian
Johannes Pfau wrote:
Hello,
I attached a patch to add D2 support to Ragel. D2 is quite different
from D1 so I created new D2 subclasses in the cd* files. I chose -E for
the commandline switch, but it could be changed to something else. D2
also needs a special syntax for const pointers: const(uint)* is a
mutable pointer to a const uint. I introduced a PTR_CONST_END function
to generate that D2 output. The generated D2 code is entirely correct
now and I tested it with some HTML header parsers.
There's one performance related problem though: In D2 a ubyte[] is
different from a ubyte[n], even if both arrays are initialized at
compile time. The ubyte[] generates a resizeable array at runtime, which
causes a performance problem. The ubyte[n] syntax should instead be used
for static constant arrays. But as ragel doesn't pass the number of
array entries to the OPEN_ARRAY function, there's no easy way to fix
that. So I wanted to ask for advice on how to implement that properly.
------------------------------------------------------------------------
_______________________________________________
ragel-users mailing list
[email protected]
http://www.complang.org/mailman/listinfo/ragel-users
_______________________________________________
ragel-users mailing list
[email protected]
http://www.complang.org/mailman/listinfo/ragel-users
Great!
When I asked about the array issue in the D newsgroup someone reported
another problem with the codegen: The D compiler sometimes needs two {
around the action code to correctly recognize it as a scope. I attached
an updated patch.
_______________________________________________
ragel-users mailing list
[email protected]
http://www.complang.org/mailman/listinfo/ragel-users
_______________________________________________
ragel-users mailing list
[email protected]
http://www.complang.org/mailman/listinfo/ragel-users
