Re: mir: How to change iterator?
On Sunday, 19 April 2020 at 02:56:30 UTC, 9il wrote: On Friday, 17 April 2020 at 08:40:36 UTC, WebFreak001 wrote: On Tuesday, 14 April 2020 at 20:24:05 UTC, jmh530 wrote: [...] Use std.algorithm:equal for range compare with approxEqual for your comparator: assert(equal!approxEqual(y, [2.5, 2.5].sliced(2))); or mir.algorithm.iteration: each that can work with nd-ranges. EDIT: or mir.algorithm.iteration: equal that can work with nd-ranges.
Re: mir: How to change iterator?
On Friday, 17 April 2020 at 08:40:36 UTC, WebFreak001 wrote: On Tuesday, 14 April 2020 at 20:24:05 UTC, jmh530 wrote: [...] Use std.algorithm:equal for range compare with approxEqual for your comparator: assert(equal!approxEqual(y, [2.5, 2.5].sliced(2))); or mir.algorithm.iteration: each that can work with nd-ranges.
Re: Checked!({short, ushort, byte, ubyte}, Throw): compilation fails
On Saturday, 18 April 2020 at 15:20:42 UTC, kdevel wrote: On Saturday, 18 April 2020 at 08:39:52 UTC, tsbockman wrote: https://code.dlang.org/packages/checkedint Hm. $ dub test Generating test runner configuration 'checkedint-test-library' for 'library' (library). Excluding package.d file from test due to https://issues.dlang.org/show_bug.cgi?id=11847 Performing "unittest" build using [...]/linux/bin64/dmd for x86_64. checkedint ~master: building configuration "checkedint-test-library"... Linking... Running ./checkedint-test-library source/checkedint/package.d(672): [unittest] unittest failure core.exception.AssertError@source/checkedint/package.d(672): unittest failure This should be fixed now. (It actually appears there was a bug in two of my unit tests *and* in *old* versions of the compiler, where the compiler bug allowed my bad unit tests to wrongly pass. Weird...)
Re: Checked!({short, ushort, byte, ubyte}, Throw): compilation fails
On Saturday, 18 April 2020 at 15:20:42 UTC, kdevel wrote: On Saturday, 18 April 2020 at 08:39:52 UTC, tsbockman wrote: https://code.dlang.org/packages/checkedint Hm. $ dub test Generating test runner configuration 'checkedint-test-library' for 'library' (library). Excluding package.d file from test due to https://issues.dlang.org/show_bug.cgi?id=11847 Performing "unittest" build using [...]/linux/bin64/dmd for x86_64. checkedint ~master: building configuration "checkedint-test-library"... Linking... Running ./checkedint-test-library source/checkedint/package.d(672): [unittest] unittest failure core.exception.AssertError@source/checkedint/package.d(672): unittest failure I think that's a compiler bug, not a bug in my checkedint package, as the unit tests pass on earlier D compiler versions (including GDC 2.075). Regardless, I'll try to track it down and either fix it or file a compiler bug report for it today.
Re: How convert String to Hex?
On Saturday, 18 April 2020 at 15:47:38 UTC, Marcone wrote:
How convert String to Hex?
Example:
string text = "Hello World"; // Converted to Hex =
48656c6c6f20576f726c64
import std.format : format;
string hex = format("%(%2x%)", "Hello World");
import std.stdio : writeln;
writeln(hex);
A bit of explanation: %( %) is a range formatting specifier, and
basically means "format each element of the range with the format
specifier between these two symbols". In other words, it's the
equivalent of "Hello World".map!(c => format("%2x", c)).joiner.
--
Simen
How convert String to Hex?
How convert String to Hex? Example: string text = "Hello World"; // Converted to Hex = 48656c6c6f20576f726c64
Re: Checked!({short, ushort, byte, ubyte}, Throw): compilation fails
On Saturday, 18 April 2020 at 08:39:52 UTC, tsbockman wrote:
[...]
You also get a deprecation message, about an integral
promotion not being performed. I believe the result is
correct and the warning can be ignored.
So the warning is a bug?
The deprecation message is a consequence of a (very annoying)
language change made after std.experimental.checkedint was
written. It's not really a bug, although someone should
probably fix it anyway.
The message suggests using -preview=intpromote. But it produces
another error:
```minusminus.d
void foo ()
{
import std.experimental.checkedint;
Checked!(short) b;
--b;
}
```
$ dmd -preview=intpromote minusminus.d
[...]/linux/bin64/../../src/phobos/std/experimental/checkedint.d(727): Error:
cannot implicitly convert expression onOverflow(this.payload) of type int to
short
minusminus.d(5): Error: template instance
std.experimental.checkedint.Checked!(short,
Abort).Checked.opUnary!"--" error instantiating
Anyway, you might want to give my checkedint package on DUB a
try, instead:
https://code.dlang.org/packages/checkedint
Hm.
$ dub test
Generating test runner configuration 'checkedint-test-library'
for 'library' (library).
Excluding package.d file from test due to
https://issues.dlang.org/show_bug.cgi?id=11847
Performing "unittest" build using [...]/linux/bin64/dmd for
x86_64.
checkedint ~master: building configuration
"checkedint-test-library"...
Linking...
Running ./checkedint-test-library
source/checkedint/package.d(672): [unittest] unittest failure
core.exception.AssertError@source/checkedint/package.d(672):
unittest failure
??:? _d_unittestp [0x4c07b5]
source/checkedint/package.d:672 void
checkedint.__unittest_L654_C5() [0x49959c]
??:? void checkedint.__modtest() [0x4bc4b2]
??:? int
core.runtime.runModuleUnitTests().__foreachbody2(object.ModuleInfo*) [0x4da1ec]
??:? int object.ModuleInfo.opApply(scope int
delegate(object.ModuleInfo*)).__lambda2(immutable(object.ModuleInfo*)) [0x4bedb7]
??:? int rt.minfo.moduleinfos_apply(scope int
delegate(immutable(object.ModuleInfo*))).__foreachbody2(ref
rt.sections_elf_shared.DSO) [0x4c581f]
??:? int rt.sections_elf_shared.DSO.opApply(scope int
delegate(ref rt.sections_elf_shared.DSO)) [0x4c5d8c]
??:? int rt.minfo.moduleinfos_apply(scope int
delegate(immutable(object.ModuleInfo*))) [0x4c57ad]
??:? int object.ModuleInfo.opApply(scope int
delegate(object.ModuleInfo*)) [0x4bed89]
??:? runModuleUnitTests [0x4da029]
??:? void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int
function(char[][])*).runAll() [0x4c226c]
??:? void rt.dmain2._d_run_main2(char[][], ulong, extern (C) int
function(char[][])*).tryExec(scope void delegate()) [0x4c21f8]
??:? _d_run_main2 [0x4c2161]
??:? _d_run_main [0x4c1f1d]
[...]/linux/bin64/../../src/druntime/import/core/internal/entrypoint.d:34 main
[0x48c241]
??:? __libc_start_main [0x7700e585]
1/3 unittests FAILED
Program exited with code 1
Re: Extracting user defined attributes on function parameters
On Saturday, 18 April 2020 at 09:19:48 UTC, Simen Kjærås wrote:
On Wednesday, Friday, 17 Apr 2020 17:45:47 UTC, H. S. Teoh
wrote:
I wonder if the ultimate cause of the above case is ultimately
caused by
the change to import semantics that hid private symbols from
outside the
module. Perhaps something, somewhere, is triggering an illegal
access of
a private symbol, which percolates up the call/instantiation
stack and
causing what appears to be a strange compiler discrepancy.
Not unlikely. Importing the module defining S in the module
defining ParameterDefaults does indeed make things compile.
Hiding S by making it private makes the error return.
It's not about private. Or even if it is, there's other issues.
Proof:
struct A {
struct S {}
void f(@S int = 3);
pragma(msg, Issue20744!f);
}
template Issue20744(func...) {
static if (is(typeof(func[0]) PT == __parameters)) {
alias Issue20744 = (PT args) {};
}
}
--
Simen
Re: Extracting user defined attributes on function parameters
On Wednesday, Friday, 17 Apr 2020 17:45:47 UTC, H. S. Teoh wrote: I wonder if the ultimate cause of the above case is ultimately caused by the change to import semantics that hid private symbols from outside the module. Perhaps something, somewhere, is triggering an illegal access of a private symbol, which percolates up the call/instantiation stack and causing what appears to be a strange compiler discrepancy. Not unlikely. Importing the module defining S in the module defining ParameterDefaults does indeed make things compile. Hiding S by making it private makes the error return. (for whatever reason your message isn't visible in the web interface) -- Simen
Re: Checked!({short, ushort, byte, ubyte}, Throw): compilation fails
On Friday, 17 April 2020 at 21:25:34 UTC, kdevel wrote: A curiosity. Usually you cast into the type on the left. But Checked!(short, Throw) b = cast (Checked!(short, Throw)) a; does not compile: Error: template std.experimental.checkedint.Checked!(int, Throw).Checked.opCast cannot deduce function from argument types !(Checked!(short, Throw))(), candidates are: [...] One has to go over the underlying type? The author of std.experimental.checkedint hasn't (yet) written the opCast overload required to make that code work. It's just a feature missing from the code for that specific module in the standard library, not a language issue. The above code will throw when casting (before the assignment), because 65535 can't fit in a short. It's remarkable that the cast to the /underlying type/ throws. I would have expected that cast(short) a is equivalent to what actually must be written as cast(short) a.get You also get a deprecation message, about an integral promotion not being performed. I believe the result is correct and the warning can be ignored. So the warning is a bug? The deprecation message is a consequence of a (very annoying) language change made after std.experimental.checkedint was written. It's not really a bug, although someone should probably fix it anyway. Anyway, you might want to give my checkedint package on DUB a try, instead: https://code.dlang.org/packages/checkedint (It's the original candidate for std.experimental.checkedint. Alexandrescu didn't like it, so he rejected it and wrote his own. But, I still think mine has a better API, especially if you use the SmartInt types.)
Re: Checked!({short, ushort, byte, ubyte}, Throw): compilation fails
On Friday, 17 April 2020 at 21:25:34 UTC, kdevel wrote: On Friday, 17 April 2020 at 12:59:20 UTC, Simen Kjærås wrote: A curiosity. Usually you cast into the type on the left. But Checked!(short, Throw) b = cast (Checked!(short, Throw)) a; does not compile: Error: template std.experimental.checkedint.Checked!(int, Throw).Checked.opCast cannot deduce function from argument types !(Checked!(short, Throw))(), candidates are: [...] One has to go over the underlying type? The author of std.experimental.checkedint hasn't implemented the overload of opCast required to make your code work. It's just a missing feature. The above code will throw when casting (before the assignment), because 65535 can't fit in a short. It's remarkable that the cast to the /underlying type/ throws. I would have expected that cast(short) a is equivalent to what actually must be written as cast(short) a.get You also get a deprecation message, about an integral promotion not being performed. I believe the result is correct and the warning can be ignored. So the warning is a bug? The warning is caused by some (very annoying, but intentional) changes made to the compiler after std.experimental.checkedint was written. That module needs to be updated accordingly, but no one has done it yet. Anyway, you might want to take a look at my checkedint package on Dub: https://code.dlang.org/packages/checkedint In my opinion, the API is better - especially if you use SmartInt. (I submitted it for inclusion in the standard library originally, but Alexandrescu did not agree with my approach and so wrote his own version, which became std.experimental.checkedint.)
Re: Working with cmd
On Friday, 17 April 2020 at 21:38:23 UTC, Quantium wrote:
Are there any libs which can be used to access cmd commands?
You can pipe cmd.exe:
---
import std.process : pipeProcess, ProcessPipes;
ProcessPipes pp = pipeProcess(["cmd.exe"]);
pp.stdin.writeln("echo foobar");
pp.stdin.close;
assert(pp.stdout.readln() == "foobar\n");
---
there are other ways depending on what you really want to do.
