Re: Deprecation message when assigning Nullable values to an associative array.
On Saturday, 3 April 2021 at 10:03:09 UTC, rikki cattermole wrote: On 03/04/2021 10:58 PM, rikki cattermole wrote: Nullable has an alias this which has been deprecated. It is due for removal (the alias this). You can remove it manually from your copy of phobos source. Otherwise you'll just have to wait until it is removed upstream. (deprecation are not errors, so you can ignore them). So yeah, next release. https://github.com/dlang/phobos/commit/36c309fc5fb5bc886e14bd8010e1375fa3a57d53#diff-81bed7f05cbd4e992067b7019125e6a1349ebe5098c6980b64bbbca8d5491e17 Thank you. I am happy with this situation. PJ
Deprecation message when assigning Nullable values to an associative array.
I am using the OpenMPI binding and, in recent times, I have been
getting a deprecation message when compiling. It seems to be
related to assigning Nullable!int entries to an associative
array. The following program shows the same message three times
but it does run as I expect.
import std.stdio, std.typecons;
void main(string[] args)
{
Nullable!(int)[string] my_entries;
// First way.
my_entries["A"] = Nullable!int.init;
// Second way.
Nullable!(int) empty;
my_entries["B"] = empty;
// Third way.
my_entries["C"] = 0.nullable;
my_entries["C"].nullify();
writeln("my_entries=", my_entries);
Nullable!(int) b = Nullable!int.init;
writeln("b=", b);
Nullable!(int) c = 0.nullable;
writeln("c=", c);
}
peterj@helmholtz ~/work/play/dlang $ dmd null_test.d
null_test.d(7): Deprecation: function
`std.typecons.Nullable!int.Nullable.get_` is deprecated -
Implicit conversion with `alias Nullable.get this` will be
removed after 2.096. Please use `.get` explicitly.
null_test.d(10): Deprecation: function
`std.typecons.Nullable!int.Nullable.get_` is deprecated -
Implicit conversion with `alias Nullable.get this` will be
removed after 2.096. Please use `.get` explicitly.
null_test.d(12): Deprecation: function
`std.typecons.Nullable!int.Nullable.get_` is deprecated -
Implicit conversion with `alias Nullable.get this` will be
removed after 2.096. Please use `.get` explicitly.
peterj@helmholtz ~/work/play/dlang $ ./null_test
my_entries=["A":Nullable.null, "C":Nullable.null,
"B":Nullable.null]
b=Nullable.null
c=0
Can someone please tell me how I should set these associative
array entries such that I keep the compiler happy?
Re: exceptions and optimization
On Monday, 21 October 2019 at 20:37:32 UTC, Nicholas Wilson wrote: What kind of conditions are you wanting to throw exception on? infinities, NaNs, ill conditioning, something else? As always the best way to check is to mark the function of interest, nothrow take a look at the disassembly and compare to without nothrow. You may also want to look to the optimisation summary that I _think_ you can get LDC to generate. Our methods take a few short cuts and occasionally step over a stability boundary, so I guess that it may look like ill-conditioning. Thank you for the explanation and suggestions.
exceptions and optimization
Toward the end of Walter's recent talk, D at 20, he says something to the effect that optimizations are disabled when exceptions can be thrown. We have a compressible flow solver in which it is very convenient to be able to throw an exception from deep within the code and catch it at a relatively high level where we can partially recover and continue the calculation. Because our calculations can run for days across hundreds of processors, we also care about letting the optimizer do its best. In what parts of our program would the optimizer be disabled because of the presence of the exception and its handling code? How do we tell?
Re: Linux & DMD & GtkD
On Monday, 18 February 2019 at 14:24:46 UTC, Ron Tarrant wrote: On Monday, 18 February 2019 at 10:38:10 UTC, Peter Jacobs wrote: Being an old linux user, I prefer make to dub, however, I do use dub to build GtkD and then I just use dmd to build my application program. This appeals to me, too. dub clean dub build Got this bit working after generating an sdl file. But I think I'm missing something from this next approach: make dmd -w -g -debug -I=../GtkD/generated/gtkd \ -oftest_rig_imperative test_rig_imperative.d \ -L../GtkD/libgtkd-3.a ./test_rig_imperative It's been literally decades since I used a makefile. Did I miss the part where you the makefile was written/generated? Yes, you did miss that part because I didn't write it in, thinking that the echo of the command would be sufficient. Sorry. Anyway, here is the single rule in my makefile. I tend to use makefiles as a memory aid so they are often quite simple. test_rig_imperative: test_rig_imperative.d dmd -w -g -debug -I=../GtkD/generated/gtkd \ -oftest_rig_imperative test_rig_imperative.d \ -L../GtkD/libgtkd-3.a Cheers, Peter J.
Re: Linux & DMD & GtkD
On Saturday, 16 February 2019 at 13:35:57 UTC, Ron Tarrant wrote: Hi guys, I finally got a Linux Mint installation happening (very impressed, BTW) and did the usual HelloWorld.d compile with dmd, but I'm having trouble working out how to link to GtkD. dmd -de -w -m64 -L+gtkd hello_gtkd_world.d says it can't find MainWindow which tells me the gtkd libraries are not installed, are not included in the path, or some other oversight on my part. I tried using whereis to find gtkd, but to no avail. Questions: 1. Am I using the right syntax in the above command line? 2. How to search for things on Linux Mint The recommendations I've found so far are for the gnome search tool which spits out an error: Package gnome-search-tool is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source Being an old linux user, I prefer make to dub, however, I do use dub to build GtkD and then I just use dmd to build my application program. Here is a transcript of building and running the first tutorial exercise on my computer that runs LinuxMint. It all works nicely, when pointing the DMD compiler to the generated gtkd bindings and the linker to the dub-built library file. peterj@helmholtz ~/work/play/dlang/GtkD $ dub clean Cleaning package at /home/peterj/work/play/dlang/GtkD... peterj@helmholtz ~/work/play/dlang/GtkD $ dub build Performing "debug" build using /usr/bin/dmd for x86_64. gtk-d:gtkd ~master: building configuration "library"... generated/gtkd/glib/Spawn.d(305,3): Deprecation: foreach: loop index implicitly converted from size_t to int gtk-d:gstreamer ~master: building configuration "library"... gtk-d:peas ~master: building configuration "library"... gtk-d:sv ~master: building configuration "library"... gtk-d:vte ~master: building configuration "library"... peterj@helmholtz ~/work/play/dlang/GtkD $ cd ../gtkd-example/ peterj@helmholtz ~/work/play/dlang/gtkd-example $ make dmd -w -g -debug -I=../GtkD/generated/gtkd \ -oftest_rig_imperative test_rig_imperative.d \ -L../GtkD/libgtkd-3.a peterj@helmholtz ~/work/play/dlang/gtkd-example $ ./test_rig_imperative Hello GtkD Imperative Bye. peterj@helmholtz ~/work/play/dlang/gtkd-example $ dmd --version DMD64 D Compiler v2.085.0-beta.1 Copyright (C) 1999-2019 by The D Language Foundation, All Rights Reserved written by Walter Bright
