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lib/rustq/atom.ex
defmodule RustQ.Atom do
@moduledoc """
Utilities for converting Elixir names into valid Rust identifiers and atoms.
"""
@max_identifier_bytes 128
@identifier_regex ~r/^[A-Za-z_][A-Za-z0-9_]*$/
@spec identifier!(atom() | String.t()) :: atom()
def identifier!(value) when is_atom(value), do: value
def identifier!(value) when is_binary(value) do
if byte_size(value) <= @max_identifier_bytes and Regex.match?(@identifier_regex, value) do
:erlang.binary_to_atom(value, :utf8)
else
raise ArgumentError, "unsafe atom identifier: #{inspect(value)}"
end
end
end