Andy-Richards

defmodule Combinations do

  # See http://rosettacode.org/wiki/Combinations#Erlang

  def comb(0, _), do: [[]];

  def comb(_, []), do: [];

  def comb(n, [h | t]) do
    lc = for l <- comb(n - 1, t), do: [h | l]

Andy-Richards

2014-01-15 15:57:21,630 [      0]   INFO -        #com.intellij.idea.Main - ------------------------------------------------------ IDE STARTED ------------------------------------------------------ 
2014-01-15 15:57:21,665 [     35]   INFO -        #com.intellij.idea.Main - IDE: IntelliJ IDEA (build #IC-133.609, 14 Jan 2014 00:00) 
2014-01-15 15:57:21,665 [     35]   INFO -        #com.intellij.idea.Main - OS: Linux (2.6.32-358.18.1.el6.x86_64, amd64) 
2014-01-15 15:57:21,665 [     35]   INFO -        #com.intellij.idea.Main - JRE: 1.7.0_21-b11 (Oracle Corporation) 
2014-01-15 15:57:21,665 [     35]   INFO -        #com.intellij.idea.Main - JVM: 23.21-b01 (Java HotSpot(TM) 64-Bit Server VM) 
2014-01-15 15:57:21,671 [     41]   INFO -        #com.intellij.idea.Main - JVM Args: -Xms128m -Xmx750m -XX:MaxPermSize=350m -XX:ReservedCodeCacheSize=96m -ea -Dsun.io.useCanonCaches=false -Djava.net.preferIPv4Stack=true -XX:+UseCodeCacheFlushing -XX:+UseConcMarkSweepGC -XX:SoftRefLRUPolicyMSPerMB=50 -XX:+HeapDumpOnOutOfM

Andy-Richards

defmodule A do
  defmacro __before_compile__(_env) do

      Enum.each(["a", "b"], fn(name) ->
          quote do
            def unquote(name), do: unquote(name)
          end
      end)

      quote do

Andy-Richards

defmodule MyMacro do
  defmacro do_something(query) do
    quote do
      args = String.split(unquote(query))
      fun = fn(arg) -> IO.inspect var!(unquote(binary_to_atom(arg))) end
      Enum.each args, fun
    end
  end
end

Andy-Richards

% from my unit tests

foo = 10

assert 10 == my_macro(:foo)
assert 10 == my_macro("foo")

% macro