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# Based on https://github.com/crystal-lang/crystal/blob/26635f1052b99ab5b52a8b051020a25435dba751/src/compiler/crystal/semantic/literal_expander.cr

macro expand_literal_ArrayLiteral_empty(node)
  {% puts "--- expansion for: #{node}" %}

  Array({{ node.of }}).new

  {% debug %}
end

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#macro data(name, &block)
#end
#
# #### Ultimately I want to do this:
# and be able to make a pre-allocated buffer of Person,
# and be able to get a reference to a single Person (but pre-allocated
# in that buffer)
#
#data Person do
#  property name : String

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class Object
  alias TypeIdType = Int32
end

#
# This is unsafe to store any class created through the ObjectPool, as as
# soon the ObjectPool is GC-ed, all pointers to classes inside that pool
# will have unknown behavior if used.
class ObjectPool(T)
  @buffer : Pointer(UInt8)

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#!/usr/bin/env python

from scapy.all import ARP, Ether, sniff, sendp


def arp_do_stuff(pkt):
    if ARP not in pkt:
        return

    arp_display(pkt)

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// References:
//
// Wikipedia IPv4 / IPv6:
// - https://en.wikipedia.org/wiki/IPv4
// - https://en.wikipedia.org/wiki/IPv6_packet
//
// Working implem:
// - https://www.binarytides.com/packet-sniffer-code-in-c-using-linux-sockets-bsd-part-2/

#include <unistd.h> // close

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# simplified example from rust:
# (https://github.com/srwalter/dbus-serialize/blob/b87fd9f78d9/src/types.rs)
#
# pub enum BasicValue {
#     Byte(u8),
#     Boolean(bool),
#     Double(f64),
#     Int16(i16),
# }
#

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Doesn't work:

 % cr in_mem_system_env.cr
Error in pluggable_system_env.cr:25: class variable '@@current_impl' of PluggableSystem::Env must be PluggableSystem::Env::Interface:Module, not Crystal::System::Env:Module

  class_getter current_impl : Interface.class = OS_BACKEND
                                                ^~~~~~~~~~

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It works!!

% cr in_mem_system_env.cr
system env: get SPEC_VERBOSE
system env: get HOME
mem env: get HOME
mem env: set HOME → my super home!
mem env: get HOME
system env: get HOME

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#######
LanguageClient 0.1.147 
#######
# (nvim rpc) 23:03:42 INFO writer-None src/rpcclient.rs:215 => None {"jsonrpc":"2.0","method":"eval","params":["[!!get(g:, 'LanguageClient_autoStart', 1), s:GetVar('LanguageClient_serverCommands', {}), get(g:, 'LanguageClient_selectionUI', v:null), get(g:, 'LanguageClient_trace', v:null), expand(get(g:, 'LanguageClient_settingsPath', '.vim/settings.json')), !!get(g:, 'LanguageClient_loadSettings', 1), get(g:, 'LanguageClient_rootMarkers', v:null), get(g:, 'LanguageClient_changeThrottle', v:null), get(g:, 'LanguageClient_waitOutputTimeout', v:null), !!get(g:, 'LanguageClient_diagnosticsEnable', 1), get(g:, 'LanguageClient_diagnosticsList', 'Quickfix'), get(g:, 'LanguageClient_diagnosticsDisplay', {}), get(g:, 'LanguageClient_windowLogMessageLevel', 'Warning'), get(g:, 'LanguageClient_hoverPreview', 'Auto'), get(g:, 'LanguageClient_completionPreferTextEdit', 0), has('nvim')]"],"id":3}
# (nvim rpc) 23:03:42 INFO reader-None src/rpcclient.rs:169 <= None {"id": 3, "jsonrpc":

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with import <nixpkgs> {};

stdenv.mkDerivation {
  name = "test-crystal-project";

  # Define that the build will need the crystal binary (and all its deps)
  buildInputs = [
    crystal
  ];