Ergo.Terminals.not_char

You're seeing just the function not_char, go back to Ergo.Terminals module for more information.
Link to this function

not_char(c_or_l, opts \\ [])

The not_char matcher accepts a char or a list of chars and will match any char that is not in the list.

Examples

iex> alias Ergo.Context
iex> import Ergo.Terminals
iex> parser = not_char(?0)
iex> assert %Context{status: {:error, [{:unexpected_char, "Should not have matched 0"}]}, input: "0000"} = Ergo.parse(parser, "0000")
iex> assert %Context{status: :ok, ast: ?1} = Ergo.parse(parser, "1111")
iex> parser = not_char([?{, ?}])
iex> assert %Context{status: {:error, [{:unexpected_char, "Should not have matched {"}]}, input: "{}"} = Ergo.parse(parser, "{}")
iex> assert %Context{status: {:error, [{:unexpected_char, "Should not have matched }"}]}, input: "}"} = Ergo.parse(parser, "}")