Re: How to raise an exception from a template?
You should also be able to do template final_sort2(v: typed) = raise newException(Exception, "Incompatible type: " & $v) Run Because type overloading does not include return types
Re: How to raise an exception from a template?
Replying myself to my question. Even if the flow of control is supposed to stop because of the exception, as the template is declared to return a typedesc, the last instruction **must** be a typedesc else the compiler prints another error... So to get the expected behaviour, the correct last template is now: template final_sort2(v: typed): typedesc = raise newException(Exception, "Incompatible type: " & $v) AST_null Run
Re: How to write shell scripts in Nim
I have a bit involved NimScript: [https://github.com/kaushalmodi/nim_config/blob/master/config.nims](https://github.com/kaushalmodi/nim_config/blob/master/config.nims) See if going through it and referring to docs helps you.
How to raise an exception from a template?
I'm using Nim type system and templates to build a table of allowed types in a
DSL language, like the following:
template final_sort2(v: bool): typedesc =
AST_bool
template final_sort2(v: int): typedesc =
AST_int
...
template final_sort2(v: typed): typedesc =
{.line: instantiationInfo().}:
raise newException(Exception, "Incompatible type: " & $v)
Run
How can I have the compiler raise the exception when the last template is
selected?
The code works without that last template, but the error message and the stack
trace reported by the compiler does not help the developer understand the
reason of the problem.
Error: in expression 'final_sort(b)(ite`gensym19185006)': identifier
expected, but found 'final_sort(b)'
Run
I would rather have a specific message reported when I can.
Re: Destructor not called for ref object
As far as I know, the default has not changed in 1.2. It’s better as some programs will not work with `--gc:arc` without changes (if you have created cycles). I suppose the default is likely to change with 2.0.
Re: How to write shell scripts in Nim
I looked at the documentation. It is too hard for me to decode. I googled for nimscript tutorial. Yielded nothing. That is why I am here just to have a head start. Hopefully this spoon feeding will nourish us to become pro someday.
Re: How to write shell scripts in Nim
https://nim-lang.github.io/Nim/nimscript.html
Re: Destructor not called for ref object
Honestly I supposed that --gc:arc is the new default gc for Nim 1.2. I'm surprised a bit. So, what is the default gc for Nim 1.2 ?
Re: Having problems with concepts that won't finish compiling
Report bugs on github please. Having said that, I think your solution without concepts is fine and all you need to do is to use `method` rather `proc` to get dynamic dispatch.
Re: How to write shell scripts in Nim
I use Linux. So, will the file extension be a factor here? I have few more questions: How do we take arguments? How do we read stdin? How do we write to stdout? How do we pipe? How do we use Linux commands like pwd / ls / cd / sed / grep etc inside the script? Will '#!/usr/bin/env nim' take care of the compilation of the script?
Re: jester params
using wrk benchmark wrk http://localhost:5000 wrk http://localhost:5000/param
Re: How to write shell scripts in Nim
Aside from putting that shebang line at the top of the file you want to run as a script, the file has to be saved as a NimScript file, namely use a .nims file ending. someScript.nims #!/usr/bin/env nim echo "Hello from NimScript!" echo defined(NimScript) Run and then in your terminal: chmod +x someScript.nims ./someScript.nims Run and it should run just fine.
Re: jester params
i mean somthing like compiled with d:release : import jester routes : get "/@id": > let val = @let val = "id" resp "hi get Requests/sec: 16536.58 > * * * > > import jester routes : get "/": resp "hi" get Requests/sec: 40102.21
How to write shell scripts in Nim
I am looking for a bash alternative to write scripts. I came to know that Nim can do this. [https://github.com/nim-lang/Nim/issues/3301](https://github.com/nim-lang/Nim/issues/3301) says: #!/usr/bin/env nim should work now. I went through Nimscript page, and also some documentations. I could not find how to do it. It would be helpful to have a complete guide on how to write and use the script.
Re: jester params
Probably best to open an issue on github ( [https://github.com/dom96/jester](https://github.com/dom96/jester)/ ) with an example
Having problems with concepts that won't finish compiling
I'm trying to make a generic Spline type for my splines in NumericalNim and the behavior I want is that all splines should have a eval proc acting on a single float. What I then wanted was to just write one proc that works for all splines that instead act on a seq[float] and uses the individual splines' eval procs in a for loop. At first I hard coded my splines like this: type SplineType*[T] = CubicSpline[T] or HermiteSpline[T] # Here CubicSpline*[T] = ref object X: seq[float] high: int len: int coeffs: seq[array[5, float]] HermiteSpline*[T] = ref object X: seq[float] high: int len: int Y: seq[T] dY: seq[T] proc eval*[T](spline: CubicSpline[T], x: float): T = ... proc eval*[T](spline: HermiteSpline[T], x: float): T = ... proc eval*[T](spline: SplineType[T], x: openArray[float]): seq[T] = result = newSeq[T](x.len) for i, xi in x: result[i] = eval(spline, xi) Run This compiles and works as expected when I call the eval proc with a seq[float]. But I want this to work on any Spline I or the user creates in the future so I found concepts which seemed to fit my needs. But I can't get it to compile :/ Rather, it never finishes. It feels like it is in some kind of infinite loop or something. The way I tried to use concepts was this: type SplineType*[T] = concept s s.eval(float) is T Run To test this out replace [this line](https://github.com/HugoGranstrom/numericalnim/blob/613062201ebd560e42a4cab2337b656a8f9b694e/src/numericalnim/interpolate.nim#L5) with the above concept and then run the test file for interpolate. > I would very much appreciate any help I could get on this matter :-)
jester params
hi, i am new here weird behaviour from jester params are very slow is even slow than database query i mean somtheing like @ " param" . any solution to that
Re: Destructor not called for ref object
Note that I have been able to get the right result by compiling your example with `--gc:arc`.
Re: WebRTC support
in the browser via js. Natively i'm not aware of any ready to use libraries for webrtc. There is status-im/libp2p, though.
Re: Call for testing of arm64, armhf, and i386 snaps of Nim
u9898287@pop-os:~/proj/nimbed$ cat nim.nim
echo "hello world"
u9898287@pop-os:~/proj/nimbed$ nim c -r nim.nim
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: nim [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: nim.nim
/home/u9898287/.cache/nim/nim_d/@mnim.nim.c: In function ‘NimMainModule’:
/home/u9898287/.cache/nim/nim_d/@mnim.nim.c:127:14: warning: passing
argument 1 of ‘echoBinSafe’ discards ‘const’ qualifier from pointer target type
[-Wdiscarded-qualifiers]
127 | echoBinSafe(TM__2KdnOX4IskX1tJhgQCK1Ag_2, 1);
| ^~~~
/home/u9898287/.cache/nim/nim_d/@mnim.nim.c:44:60: note: expected
‘NimStringDesc **’ {aka ‘struct NimStringDesc **’} but argument is of type
‘NimStringDesc * const*’ {aka ‘struct NimStringDesc * const*’}
44 | N_LIB_PRIVATE N_NIMCALL(void, echoBinSafe)(NimStringDesc** args, NI
argsLen_0);
|^~~~
/home/u9898287/.cache/nim/nim_d/stdlib_system.nim.c: In function
‘sysFatal__1rw9bzpRcCrBi6FIqHe7a4wsystem’:
/home/u9898287/.cache/nim/nim_d/stdlib_system.nim.c:4866:1: warning:
‘noreturn’ function does return
4866 | }
| ^
/home/u9898287/.cache/nim/nim_d/stdlib_system.nim.c: In function
‘sysFatal__loKUBbrfPTCD1cUb5IkxkAsystem’:
/home/u9898287/.cache/nim/nim_d/stdlib_system.nim.c:5335:1: warning:
‘noreturn’ function does return
5335 | }
| ^
/home/u9898287/.cache/nim/nim_d/stdlib_system.nim.c: In function
‘sysFatal__wxS1DD5S67Tovuyk2fdOLwsystem’:
/home/u9898287/.cache/nim/nim_d/stdlib_system.nim.c:5685:1: warning:
‘noreturn’ function does return
5685 | }
| ^
Hint: [Link]
Hint: 13891 LOC; 1.484 sec; 21.145MiB peakmem; Debug build; proj:
/home/u9898287/proj/nimbed/nim.nim; out: /home/u9898287/proj/nimbed/nim
[SuccessX]
Hint: /home/u9898287/proj/nimbed/nim [Exec]
hello world
Run
Pop OS 19.10.
Re: Destructor not called for ref object
Thanks. I will. I didn't know whether it was an issue or me doing something wrong.
Re: Destructor not called for ref object
Please report issues on github.
WebRTC support
Any suggestions about WebRTC support in Nim?
