String.to_integer("+") returns 0 is expected behaviour?

[-E:), niku]

Hi, folks.

I'm faced with following iex.
String.to_integer("+") and String.to_integer("-") return 0.
Is it a expected behaviour?

/Users/niku% iex
Erlang/OTP 17 [erts-6.4] [source] [64-bit] [smp:4:4]
[async-threads:10] [hipe] [kernel-poll:false] [dtrace]

Interactive Elixir (1.0.5) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> String.to_integer("42")
42
iex(2)> String.to_integer("a")
** (ArgumentError) argument error
:erlang.binary_to_integer("a")
iex(2)> String.to_integer(" ")
** (ArgumentError) argument error
:erlang.binary_to_integer(" ")
iex(2)> String.to_integer("+")
0
iex(3)> String.to_integer("-")
0
iex(4)> String.to_integer("*")
** (ArgumentError) argument error
:erlang.binary_to_integer("*")
iex(5)> String.to_float("+")
** (ArgumentError) argument error
:erlang.binary_to_float("+")

regards.

[José Valim]

It is a bug, please file a bug report!

José Valim

www.plataformatec.com.br

Skype: jv.ptec

Founder and Director of R&D

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[ni...@niku.name]

OK.

I created an issue.
https://github.com/elixir-lang/elixir/issues/3538

Thanks for your quick response!