Bottle.Number.is_non_neg_number
You're seeing just the macro
is_non_neg_number
, go back to Bottle.Number module for more information.
Guard that passes when a number is a non_neg_number
Examples
iex> is_non_neg_number(1) true
iex> is_non_neg_number(1.1) true
iex> is_non_neg_number(0) true
iex> is_non_neg_number(-1) false
iex> is_non_neg_number({"anything", "else"}) false