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retired
0.1.0
NIF based bindings for libvips
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lib/vix/vips/enum.ex
defmodule Vix.Vips.EnumHelper do
@moduledoc false
def __before_compile__(env) do
for {name, enum} <- Vix.Nif.nif_vips_enum_list() do
def_vips_enum(name, enum, env)
end
quote do
end
end
def def_vips_enum(name, enum, env) do
module_name = Module.concat(Vix.Vips.Enum, name)
{enum_str_list, _} = Enum.unzip(enum)
spec = Enum.reduce(enum_str_list, &{:|, [], [&1, &2]})
contents =
quote do
# Internal module
@moduledoc false
@type t() :: unquote(spec)
alias Vix.Type
@behaviour Type
@impl Type
def typespec do
quote do
unquote(__MODULE__).t()
end
end
@impl Type
def default(default), do: default
unquote(
Enum.map(enum, fn {name, value} ->
quote do
@impl Type
def to_nif_term(unquote(name), _data), do: unquote(value)
@impl Type
def to_erl_term(unquote(value)), do: unquote(name)
end
end)
)
end
Module.create(module_name, contents, line: env.line, file: env.file)
end
end
defmodule Vix.Vips.Enum do
@moduledoc false
@before_compile Vix.Vips.EnumHelper
end