On Friday, 5 June 2020 at 17:03:40 UTC, Luis wrote:
So I actually managed to "debug" my unittests but It requires
that I run previsuly "dub test" on console, so the executable
is update. As I understand, I need to setup a task to be
prelaunched by debug to generate the unittest executable, but I
don't know how setup it correctly. I only manage to build the
library, but not the unittest executable.
Also, how hell I can see the content of a array on the
debugger? I only see the length and "pointer" property. I try
to add a watch expression to these pointer with the "@" but the
show content, don't matches the real stuff on the array... This
it's forcing me to use the old classic "debug with printfs"
with it's annoying if you have pure @nogc nothrow annotated
code.
I have the impression that debugging D has get worse in this
last years. I remember debuging with "ddd" with zero issues
like five years ago, and now I keep hitting all kind of
troubles with anything that I try.
To build before running the debugger, add the following task to
your task definitions file (Ctrl-Shift-B):
{
"label": "dub build", // <-- add a good name here
"type": "dub",
"run": false,
"buildType": "unittest", // <-- this makes it build the unittests
"problemMatcher": [
"$dmd"
],
"group": "build"
}
And in the debug configuration add the preLaunchTask with the
given label:
{
"version": "0.2.0",
"configurations": [
{
...,
"preLaunchTask": "dub build"
}
]
}
For more information consult the User Guide (F1 -> code-d User
Guide / Documentation) and see the Debugging section.
Directly debugging the unittests from code-d is not supported
yet, but is in planning.
About the debugging printing: pretty printers might make it look
worse than it would be with the plain GDB formatter. But
definitely this could be improved. If you use the Native Debug
extension it should default to the plain value printer, which in
turn might make other stuff not look so good. If you use the
C/C++ extension, you might be able to have better support if you
add a Natvis file. Void-995 wrote a D natvis file like 2 years
ago, which was never fully finished (DL:
https://www.dropbox.com/s/t5yejma3w7cbna9/dlang.natvis?dl=1 ;
mirror: https://wfr.moe/f6xBDC/dlang.natvis), so I'm not sure how
well that works now.
Btw if you use the latest serve-d version (release channel
"nightly") you will have snippets to insert debug printf
statements like
debug { import std.stdio : writeln; try { writeln(""); } catch
(Exception) {} }
debug { import std.stdio : writefln; try { writefln!""(); } catch
(Exception) {} }
debug { import core.stdc.stdio : printf; printf("\n"); }
which work in @nogc @safe nothrow pure
