hst337

hst337

Incremental compilation bug (or undefined behaviour?)

Inter-module dependency tracing bug

Consider this module

defmodule XXX do
  module = String.to_atom("Elixir." <> "YYY")
  @x apply(Enum.at([module, ZZZ], 0), :func_y, [0])
  def x do
    @x
  end
end

It is clear that it depends on YYY module in compile time, but

  1. when YYY is changed and recompile (or just mix) is called, XXX is not recompiled.
  2. when ZZZ is changed and project recompiled, XXX is recompiled, but it is clear that ZZZ is not called in compile time

Is this a correct behavior or not?

Marked As Solved

josevalim

josevalim

Creator of Elixir
  1. The atom is dynamically generated at compile time.

—-

Elixir tracks it during expansion, not after.

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