Elixir v1.12.0

URI.char_unreserved-question-mark

You're seeing just the function char_unreserved-question-mark, go back to URI module for more information.
Link to this function

char_unreserved?(character)

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Specs

char_unreserved?(byte()) :: boolean()

Checks if character is an unreserved one in a URI.

As specified in RFC 3986, section 2.3, the following characters are unreserved:

  • Alphanumeric characters: A-Z, a-z, 0-9
  • ~, _, -, .

Examples 

iex> URI.char_unreserved?(?_)
true