Re: cant run unittests
On Saturday, 8 December 2018 at 19:25:41 UTC, Andrew Pennebaker
wrote:
On Saturday, 16 July 2016 at 20:22:15 UTC, Seb wrote:
On Thursday, 14 July 2016 at 10:13:38 UTC, dom wrote:
On Thursday, 14 July 2016 at 00:33:50 UTC, ethgeh wrote:
On Wednesday, 13 July 2016 at 19:41:53 UTC, dom wrote:
how can i run my unittests for a dynamic library? some
weird conflict is reported between main functions, my
project doesnt contain any main function.
[...]
try to put this before the main of your application:
"version(unittest){} else"
it looks like the default unittest config implies the switch
"-main".
as i said my project doesnt contain a main() function
Are you sure? The error message states exactly this. Could you
reduce the project to a single file and upload it somewhere
(e. g. github).
I am getting the same error for my projects. I tried prefacing
my main functions with the version(unittest) {} else snippet
(which we really shouldn't have to do!!!) but anyway that
didn't change the behavior of dub test at all.
It is a quite old thread but the issue is still relevant. In the
first post, there is a dependency to poodinis which defines in
the test package a void main function.
Maybe main functions in dependencies causing this issue. Which
dependencies do you have?
Kind regards
Andre
Re: How to get a function name (string) @ compile time
On Sunday, 9 December 2018 at 03:29:27 UTC, Andrew Pennebaker
wrote:
Er, when I try to use either foo.stringof, or
__trait(identifier, foo), I always get that binding name,
rather than the original function name, sad panda.
I can only print out the current variable name, but I want to
print the name of the function declaration, no matter how
deeply I pass that first function pointer into different calls
:/
You're confusing function pointer with the function symbol. This
will not give you the function name:
import std.stdio;
void wrap(F)(F f) { writeln(__traits(identifier, f)); }
int foo() { return 0; }
void main() { wrap(&foo); }
But this will:
import std.stdio;
auto wrap(alias f, Args...)(auto ref Args args) {
import std.functional : forward;
writeln("Calling ", __traits(identifier, f));
return f(forward!args);
}
int foo() { return 42; }
size_t bar(string x) { return x.length; }
void main() {
assert(wrap!foo == 42);
assert(wrap!bar("hello") == 5);
}
Re: Imports and Subfolders and Links (Oh, My!)
Thanks everyone.
Calling function explicitly from mixin template results in recursive call instead
I'm using Adam's workaround from
https://issues.dlang.org/show_bug.cgi?id=19365, but now I have
endless recursion. Reduced code:
```
mixin template operators() {
S opBinary(string op: "+")(S rhs) {
return rhs;
}
// (A)
auto opBinary(string op, T)(T rhs) if (false) {
return rhs;
}
}
struct S {
mixin operators ops;
S opBinary(string op, T)(T a) {
return ops.opBinary!op(a);
}
}
void main() {
S.init.opBinary!"+"(S.init);
}
```
Believe it or not, `ops.opBinary!op(a);` doesn't call anything
from the mixin template ops, but it calls itself and it results
in a stack overflow. I think this is a bug, but last time I was
wrong, so maybe someone can explain what's going on here.
Note that after removing the opBinary at (A), it works. The idea
behind it is that it converts the rhs to an S that opBinary!"+"
takes. A less reduced version would be:
```
auto opBinary(string op, T)(T rhs) if (!is(T==S)) {
return this.opBinary!op(S(rhs));
}
```
Does anyone know how to get this working?
Re: ElementType of MapResult is a delegate??
On 12/8/18 8:19 AM, John Chapman wrote:
On Saturday, 8 December 2018 at 13:02:00 UTC, Yuxuan Shui wrote:
This surprised me A LOT:
https://d.godbolt.org/z/82a_GZ
So if I call something.map!().array, I get an array of delegates? That
makes no sense to me.
But in your example, "(a) =>" returns "{return tmp;}", which is a
delegate. Just write "(a) => tmp", or invoke the delegate by turning it
into a call: "{return tmp;}()".
This is exactly why (a) => {return tmp;} should not compile.
Almost everyone has made that mistake.
-Steve
Re: Working with ranges
On 12/7/18 11:16 PM, Adam D. Ruppe wrote: On Saturday, 8 December 2018 at 04:11:03 UTC, Murilo wrote: What is the difference between declaring "int[3] a = [1,2,3];" and declaring "int[] a = [1,2,3];"? Is the first an array and the second a range? They are both arrays, just the former one has a fixed size and the latter does not. Ranges require a way to iterate and consume elements, meaning they cannot be fixed size. I always thought that leaving the square brackets empty would create an array of flexible size, it never occurred to me that it was creating something else. That's what it is, just a flexible array also happens to be an array, whereas a fixed-size array is not one. I think, you mean "a flexible array also happens to be *a range*..." -Steve
Re: dmd -unittest works poorly with executables
On 12/8/18 3:16 PM, Andrew Pennebaker wrote:
I think it's lame to have to use magical code like `version(unittest) {}
else` to guard our main functions, when we run unit tests. Could D go
ahead and do the right thing, automatically shadowing our main functions
when the unit tests are run?
This is in process of deprecation, but I dropped the ball on making sure
the deprecation happened in a timely manner (also I see the ddoc doesn't
show the list very well...)
See this in the description of core.runtime.runModuleUnitTests:
https://dlang.org/phobos/core_runtime.html#.runModuleUnitTests
"If the switch --DRT-testmode is passed to the executable, it can have
one of 3 values:
1. "run-main": even if unit tests are run (and all pass), main is still
run. This is currently the default.
2. "test-or-main": any unit tests present will cause the program to
summarize the results and exit regardless of the result. This will be
the default in 2.080.
3. "test-only", the runtime will always summarize and never run main,
even if no tests are present."
Will do a PR to switch the default.
-Steve
Re: Working with ranges
Hi guys, thank you for helping me out here, there is this facebook group for the D language, here we can help and teach each other. It is called Programming in D. Please join. https://www.facebook.com/groups/662119670846705/?ref=bookmarks
Re: Why pow() won't go beyond 2^31?
Hi guys, thank you for helping me out here, there is this facebook group for the D language, here we can help and teach each other. It is called Programming in D. Please join. https://www.facebook.com/groups/662119670846705/?ref=bookmarks
Re: How do I install a library?
Hi guys, thank you for helping me out here, there is this facebook group for the D language, here we can help and teach each other. It is called Programming in D. Please join. https://www.facebook.com/groups/662119670846705/?ref=bookmarks
Re: Which character set does D use?
Hi guys, thank you for helping me out here, there is this facebook group for the D language, here we can help and teach each other. It is called Programming in D. Please join. https://www.facebook.com/groups/662119670846705/?ref=bookmarks
Re: How to get a function name (string) @ compile time
On Sunday, 9 December 2018 at 03:29:27 UTC, Andrew Pennebaker wrote: On Monday, 3 November 2008 at 12:29:16 UTC, Simen Kjaeraas wrote: On Mon, 03 Nov 2008 12:33:05 +0100, Denis Koroskin <2kor...@gmail.com> wrote: [...] That's not the only error here. Your template function also calls foo with no arguments on the line below that bug. Fixing that would probably include the ParameterTypeTuple and ReturnType templates. Er, when I try to use either foo.stringof, or __trait(identifier, foo), I always get that binding name, rather than the original function name, sad panda. I can only print out the current variable name, but I want to print the name of the function declaration, no matter how deeply I pass that first function pointer into different calls :/ You may want to look at https://forum.dlang.org/post/yxobqahkvfcpcvidq...@forum.dlang.org
How may I tell dub where to find a C library for linking?
Hi, I was playing with the example in https://github.com/MoritzMaxeiner/llvm-d/tree/master/examples/fibonacci When I try to build it using dub, the linker cannot find the LLVM library $ dub build Performing "debug" build using /usr/bin/dmd for x86_64. llvm-d 2.4.1: target for configuration "native-target" is up to date. fibonacci ~master: building configuration "link-single"... Linking... /usr/bin/ld: cannot find -lLLVM collect2: error: ld returned 1 exit status Error: linker exited with status 1 /usr/bin/dmd failed with exit code 1. On my system (Debian GNU/Linux 9, 64 bits) the library is in the directory /usr/lib/llvm-6.0/lib/ $ ls -l /usr/lib/llvm-6.0/lib/libLLVM.so lrwxrwxrwx 1 root root 14 oct 24 19:44 /usr/lib/llvm-6.0/lib/libLLVM.so -> libLLVM-6.0.so But how am I supposed to tell dub this, so it passes this information to the linker?? I guess I should set "libs" in dubs.json Off course I have tried to read the dub documentation (like https://code.dlang.org/package-format?lang=json) but it was not clear enough to me. Please note that this library cannot be find by pkgconfig. Many thanks! Pablo
Re: How may I tell dub where to find a C library for linking?
On Monday, 10 December 2018 at 02:59:21 UTC, Pablo De Nápoli wrote: On my system (Debian GNU/Linux 9, 64 bits) the library is in the directory /usr/lib/llvm-6.0/lib/ $ ls -l /usr/lib/llvm-6.0/lib/libLLVM.so lrwxrwxrwx 1 root root 14 oct 24 19:44 /usr/lib/llvm-6.0/lib/libLLVM.so -> libLLVM-6.0.so But how am I supposed to tell dub this, so it passes this information to the linker?? I guess I should set "libs" in dubs.json IIRC your guess is correct. "libs" is passed directly to linker and is the only way to do it, so you just do smth like this "libs" : ["-L/usr/lib/llvm-6.0/lib/", "libLLVM-6.0"] note that this -L will be extended for linker as -L-L... (also note that you can do platform specific way with "libs-windows", "libs-posix"? to pick proper paths per platform) Though I'm not a linux pro and don't remember if linking to .so is same as linking import library, if this is not the case you just need to set RPATH or whatever it is so it can find dynamic lib.
