On Thursday, 14 June 2012 at 16:29:31 UTC, Timon Gehr wrote:
On 06/14/2012 06:20 PM, Roman D. Boiko wrote:
On Thursday, 14 June 2012 at 16:08:54 UTC, Roman D. Boiko
wrote:
On Thursday, 14 June 2012 at 16:05:52 UTC, Timon Gehr wrote:
You can overload based on 'ref'.
auto just(ref immutable(T) data) { return Maybe!T(&data); }
auto just(immutable(T) data) { return Maybe!T([data].ptr); }
Great! Thanks
Hmm... seems to fail for immutable:
immutable a = 2.0f;
#line 121
auto y0 = Maybe!float.just(a);
assert(!y0.empty);
assert(y0.front == a);
Compiler output:
fds/persistent.d(121): Error: 2 is not an lvalue
dmd: glue.c:1114: virtual unsigned int Type::totym():
Assertion `0' failed.
Aborted (core dumped)
make: *** [build/client] Error 134
You have found a compiler bug.
Looks like :) So far I decided to remove ref overload. If I want
to avoid copying, I can use maybeCreate(Immutable(T*) payload).
