crystal-lang/crystal

The Crystal programming language | http://crystal-lang.org | Fund Crystal's development: http://is.gd/X7PRtI | Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/

Jonathan Silverman

@mixflame

Rishav, have you looked at Crystal OpenSSL libraries and the Crypto module?

Rishav Sharan

@rishavs

I started there but I couldn't find any method which looks like it does what I need

Nikolaii Lodenos

@lodenos

Good Evening form LDN :)
I try to do that but I’ve

 20 | {% methods = method_listing(descriptions) %}
                   ^-------------
Error: undefined macro method: 'method_listing'

This is the code

macro method_listing(descriptions)
  %methods = [] of String
  {% for description in descriptions %}
    {% for key in description["methods"] %}
      %methods << %key
    {% end %}
  {% end %}
  %methods.uniq!
end

macro method_switch(descriptions)
  {% methods = method_listing(descriptions) %}
end

Do u have some Idea ???

Ary Borenszweig

@asterite

Yes. You can't call a macro from inside a macro.

George Dietrich

@Blacksmoke16

Does this even need to be a macro?

Nikolaii Lodenos

@lodenos

Hum I see but the code can be more reable because I try to refactor 300 lignes code of pure macro

@Blacksmoke16 It’s a exemple of my issue

George Dietrich

@Blacksmoke16

could prob do like method_listing {{descriptions}}

but my question still stands, dont really need a macro to do this type of thing

related crystal-lang/crystal#8835

Nikolaii Lodenos

@lodenos

Ok I understand It’s was an exemple a somthing more complicated

George Dietrich

@Blacksmoke16

fair enough

Nikolaii Lodenos

@lodenos

How can we organised a really big macro ?

like 300 lines

George Dietrich

@Blacksmoke16

use variables, proper indenting etc

got a link to it?

Nikolaii Lodenos

@lodenos

https://github.com/Minva/Cocaine/blob/master/src/cocaine.cr

It’s Horrible how it’s writed

I don’t understand my own code

George Dietrich

@Blacksmoke16

oo another framework :P

Nikolaii Lodenos

@lodenos

it’s more a library than a framework

George Dietrich

@Blacksmoke16

unfortunately there just isnt a good way to have clean macro code because you can't define reusable macro methods (yet?)

could probably just add more comments or something, id also suggest writing some tests, be easier to ensure its working at least

Nikolaii Lodenos

@lodenos

Right, thx for the anser, I hope one day we can reuse macro methods can be really powefull

George Dietrich

@Blacksmoke16

have you considered using annotations instead of the hash?

@[Cocaine::Route(path: "/", verb: "GET")]
def controller_index(context : HTTP::Server::Context, params : Cocaine::Param)
  context.response.content_type = "text/plain"
  context.response.print "Hello world, got #{context.request.path} !"
end

@[Cocaine::Route(path: "/user/:id", verb: "GET")]
def controller_user(context : HTTP::Server::Context, params : Cocaine::Param)
  context.response.content_type = "text/plain"
  context.response.print "Hello world, got #{context.request.path} !"
end


################################################################################
# Server
################################################################################

server = HTTP::Server.new { |context| Cocaine.match_endpoint context }
server.listen "0.0.0.0", 5000

Nikolaii Lodenos

@lodenos

I never try that on my own code

George Dietrich

@Blacksmoke16

looks like a good use case for them. However the downside is there isn't a way to iterate over all methods with an annotation, so would need to think of a way around that.

but :shrug: just a thought

Nikolaii Lodenos

@lodenos

With this lib I’ve only one object a bit useless

George Dietrich

@Blacksmoke16

hm?

Nikolaii Lodenos

@lodenos

Be first here https://github.com/the-benchmarker/web-frameworks

George Dietrich

@Blacksmoke16

fair enough

good luck

Nikolaii Lodenos

@lodenos

I know XD

George Dietrich

@Blacksmoke16

benchmarks like that are mainly just testing the router, is fairly easy to have a faster framework, but then the framework itself isn't much of a framework

pretty sure all the crystal ones on there are using HTTP::Server, so to be faster than that you might need to get creative

https://github.com/S-YOU/h2o.cr such as binding to a c http server like this one did

Nikolaii Lodenos

@lodenos

Learn to optimize to the maximum helps to understand in detail the suptiles of the language and its conception. I can imagine.

didactic-drunk

@didactic-drunk

Why doesn't Bytes.new call GC.malloc_atomic? How does it get it's memory or any other Pointer.malloc? I'm attempting to track malloc usage and my monkey patches don't run.

oprypin

@oprypin:matrix.org

[m]

https://github.com/crystal-lang/crystal/blob/dd40a2442fa186add8a82b74edb14a90aa1dae05/src/slice.cr#L129

@didactic-drunk: it seems that the memory allocated for pointers isn't assumed to be atomic then

atomic, as I understand, being a declaration that that memory will not contain GC-relevant pointers

for arrays a choice was made to always assume that their memory will not contain undeclared pointers, that's where u get malloc_atomic, but it's not used always

Quinton Miller

@HertzDevil

crystal-lang/crystal#10643

Jonathan Silverman

@mixflame

if anyone is into amber, can you please review pull request #1265 on amberframework/amber and tell me if you can spot any weaknesses? it's a multichannel redis adapter for websockets

George Dietrich

@Blacksmoke16

your link broke ^

didactic-drunk

@didactic-drunk

I monkey patched GC.malloc* and it segfaults only with -Dpreview_mt when calling an empty function. https://github.com/didactic-drunk/fiber_stats.cr/pull/1#discussion_r665800802

From IRC (bridge bot)

@FromIRC

<postmodern> so what is the difference between .as(Int32) and .to_i32 ?

George Dietrich

@Blacksmoke16

the former just tells the compiler to treat the values as an int32 without actually doing the conversion

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