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  • 02:47
    Blacksmoke16 reopened #8468
  • 02:45
    Blacksmoke16 closed #8468
  • Dec 06 13:16
    straight-shoota milestoned #12824
  • Dec 06 13:16
    straight-shoota milestoned #12824
  • Dec 06 13:07
    straight-shoota edited #11555
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    straight-shoota milestoned #12782
  • Dec 06 11:30
    straight-shoota milestoned #12782
  • Dec 06 09:51
    BlobCodes synchronize #12687
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    caspiano labeled #12824
  • Dec 06 09:34
    caspiano opened #12824
  • Dec 06 09:34
    caspiano labeled #12824
  • Dec 06 08:53
    BlobCodes synchronize #12687
  • Dec 06 08:53
    BlobCodes synchronize #12687
  • Dec 05 22:06
    Sija synchronize #12759
  • Dec 05 21:01
    straight-shoota closed #12634
  • Dec 05 21:01
    straight-shoota closed #12779
  • Dec 05 21:01
    straight-shoota edited #12779
  • Dec 05 21:01
    straight-shoota closed #12784
  • Dec 05 21:01
    straight-shoota closed #11859
  • Dec 05 16:04
    pbrumm synchronize #12822
Ali Naqvi
@naqvis
bovepm
@bovepm
hi there! former rubyist and crystal newbee here. I am currently writing some crystal code and wanted to use the mixin Enumerable on class level rather than on instance level (see code below). any hints?
https://carc.in/#/r/bc7v
erdnaxeli
@erdnaxeli:cervoi.se
[m]
just extend it: https://carc.in/#/r/bc7z
bovepm
@bovepm
super, thanks for the quick reply
Thore Bödecker
@foxxx0
Hi, any suggestions on how I would best implement a predefined set of format strings / placeholders that can be user-specified (e.g. via config file)? I don't want allow users to directly influence the #sprintf formatstring for security reasons, I was thinking more in the direction of having something like "some prefix: ###foo.attr1### with ###foo.attr2###" where I want to replace "###foo.attr1###" with the value of foo.attr1 and so on. How could achieve that somewhat elegantly?
Ali Naqvi
@naqvis
@foxxx0 Crystal doesn't support RTTI, that means there is no way to achieve dynamic execution of props/methods. Crystal expects methods/fields calls to be known at compile time. What I understand from your context is you are looking for some template language which you can invoke at run-time
12 replies
Thore Bödecker
@foxxx0
correct
Ali Naqvi
@naqvis
AFAIK crinja does this trick of run-time execution, so that might be something you can refer to
Thore Bödecker
@foxxx0
mh, looks like crinja strictly expects values and not custom classes
maybe i'll need to parse the user-supplied argument then and provide crinja with the correct value? but then there is no point to pulling in crinja
Ali Naqvi
@naqvis
hmm, how come such conclusion?
Template engine doesn't force you to any specific set of usage
you can access any object as long as template engine has access to that object
For example
{%- for article in articles if article.published %}
  <div class="article">
    <h2><a href="{{ article.href|e }}">{{ article.title|e }}</a></h2>
    <p class="meta">written by <a href="{{ article.user.href|e
      }}">{{ article.user.username|e }}</a> on {{ article.pub_date|dateformat }}</p>
    <div class="text">{{ article.body }}</div>
  </div>
{%- endfor %}
Steve Hiemstra
@speg
speaking of templates, how do i make this work:
ECR.def_to_s "#{ECR_ROOT}/greeter.ecr"
Can't do that when calling a macro?
George Dietrich
@Blacksmoke16
does that not already work?
Steve Hiemstra
@speg

Kinda. I think it's constant above that is broken:

require "ecr"

ECR_ROOT = "./src/template/components/ecr"

class Greeter
  def initialize(@name : String)
  end

  ECR.def_to_s "#{ECR_ROOT}/greeter.ecr"
end

pp! ECR_ROOT
pp! Greeter.new("John").to_s # => "Greetings, John!\n"

Gives:

There was a problem expanding macro 'embed'

Code in macro 'def_to_s'

 2 | ECR.embed "#{ECR_ROOT}/greeter.ecr", "__io__"
     ^
Called macro defined in /usr/local/Cellar/crystal/1.0.0/src/ecr/macros.cr:69:3

 69 | macro embed(filename, io_name)

Which expanded to:

 > 1 | {{ run("ecr/process", "#{ECR_ROOT}/greeter.ecr", "__io__") }}
          ^--
Error: Error executing run (exit code: 1): ecr/process '"./src/template/components/ecr"/greeter.ecr' __io__


stderr:

    Error opening file with mode 'r': '\"./src/template/components/ecr\"/greeter.ecr': No such file or directory
George Dietrich
@Blacksmoke16
try and use __DIR__ instead of .
pretty sure . is the dir you're executing the file from while __DIR__ is the location of the file or something like that
oh but try doing ECR.def_to_s "#{ECR_ROOT.id}/greeter.ecr"
Steve Hiemstra
@speg
same thing, I had also tried using Dir.current with no luck
ooh, .id?
George Dietrich
@Blacksmoke16
yea
Steve Hiemstra
@speg
Success! 🙌🏼 Thank you sir. I haven't used macros yet, what's going on here?
George Dietrich
@Blacksmoke16
seems like its interpolating the string literal into the other string. Notice the path in the error has like \", instead of just like ecr/greeter.ecr
.id returns the raw value of the constant, e.g. ./src/template/components/ecr
maybe thats a bug as it's deff not what you'd expect :shrug:
Steve Hiemstra
@speg
hehe, neat. I was reading up on macros just last night but obvs need to learn some more. Thanks again!
didactic-drunk
@didactic-drunk
Why does crystal doc skip all my classes except for a monkey patched Slice in my project
George Dietrich
@Blacksmoke16
I'd guessCrypto already exists and is nodoc
didactic-drunk
@didactic-drunk
I don't see defined Cryptoanywhere. It's implicitly defined as Crypto::{Subtle,Bcrypt,Blowfish}
oprypin
@oprypin:matrix.org
[m]
@didactic-drunk: because Crypto is marked as originating from stdlib by its first occurrence in the whole code blob, and the whole stdlib is excluded from doc building
didactic-drunk
@didactic-drunk
@oprypin:matrix.org Now I have a workaround. Thank you
oprypin
@oprypin:matrix.org
[m]
@didactic-drunk: im scared. what is it?
didactic-drunk
@didactic-drunk
From IRC (bridge bot)
@FromIRC
<oprypin> oh.
oprypin
@oprypin:matrix.org
[m]
wow what a nice deduction just from that hint
didactic-drunk
@didactic-drunk
:curtsey:
me
@me:ky.rs
[m]
@didactic-drunk I appreciate your explanation on what is not a secret, Lol.
Jonathan Silverman
@mixflame
please vote for my PR guys <3 amberframework/amber#1265
if you use amber
<3
didactic-drunk
@didactic-drunk
@me:ky.rs You'll probably like Bidet (Who doesn't? They're hours of fun)
1 reply
postmodern
@postmodern:matrix.org
[m]
@didactic-drunk: do you wnat me to move ioctl.cr to crystal-posix? if so, could you look over the code first.
didactic-drunk
@didactic-drunk
@postmodern:matrix.org You're welcome to move it now, or not. I'll have to look in a few hours but that can be handled with PR's.
How do I check if a module exists in a macro?
4 replies
Kaia Leahy
@tenebrousedge
why?
usually if I am wondering about questions of that nature, I'm checking if an object subclasses a type, or whether it responds to a given method
didactic-drunk
@didactic-drunk
I have an optional module which may not exist if not required
Jonathan Silverman
@mixflame
there is a definite bug in resolving localhost sometimes in crystal on my OS