locopati
Unicode output from the debugger
I was using the Erlang trace debugger to see how my string parsing code was being called. The strings are Unicode and so the output was like this…
(<0.101.0>) returned from ‘Elixir.Tinker’:handle/2 → [<<226,191,178>>,
[<<230,173,162>>,
<<232,135,170>>,
<<229,183,179>>,
<<229,133,171>>,
<<229,164,130>>]]
I ran iex --werl but that didn’t affect the debug output. Is it possible to make the Erlang debugger output Unicode strings so that they’re readable, rather than as bitstrings?
thanks
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josevalim
The Adopting Elixir book has a chapter on production tools and a section on :dbg, here is the example we use:
iex> fun = fn _, 100 -> :dbg.stop_clear(); msg, n -> IO.inspect(msg) && n + 1 end
iex> :dbg.tracer(:process, {fun, 0})
josevalim
Which debugging are you using? :dbg? :sys? Note they usually allow you to pass a handler, so you can pass your own handler instead of relying on the default one.
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