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Elixir to Erlang
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% erl -pa /usr/share/elixir/1.0.5/lib/*/ebin -elixir ansi_enabled true | |
application:ensure_all_started(elixir), | |
rr("/usr/share/elixir/1.0.5/lib/elixir/src/elixir.hrl"). | |
% A simplified version of 'Elixir.Code':eval_string/2 | |
% https://github.com/elixir-lang/elixir/blob/v1.2.0/lib/elixir/lib/code.ex#L159 | |
EvalString = fun(String, Binding) -> | |
% Converts a given string (char list) into quote expression | |
% https://github.com/elixir-lang/elixir/blob/v1.2.0/lib/elixir/src/elixir.erl#L252 | |
Tree = elixir:'string_to_quoted!'(String, 1, <<"nofile">>, Binding), | |
io:format("%% Elixir AST: ~n~n~p~n~n", [Tree]), | |
Env = elixir:env_for_eval([]), | |
Scope = elixir_env:env_to_scope(Env), | |
{ParsedBinding, ParsedScope} = elixir_scope:load_binding(Binding, Scope), | |
ParsedEnv = Env#{vars := [K || {K,_} <- ParsedScope#elixir_scope.vars]}, | |
% Translate Elixir quoted expressions to Erlang Abstract Format. | |
% https://github.com/elixir-lang/elixir/blob/v1.2.0/lib/elixir/src/elixir.erl#L197 | |
{Erl, _NewEnv, _NewScope} = elixir:quoted_to_erl(Tree, ParsedEnv, ParsedScope), | |
io:format("%% Erlang Abstract Format: ~n~n~p~n~n", [Erl]), | |
io:format("%% Erlang: ~n~n~s~n~n", [lists:flatten(erl_pp:expr(Erl))]), | |
% Running code | |
% https://github.com/elixir-lang/elixir/blob/v1.2.0/lib/elixir/src/elixir.erl#L215 | |
erl_eval:expr(Erl, ParsedBinding, none, none, none) | |
end. | |
% Examples: | |
EvalString("IO.puts(\"Value of 'my_var' = #{my_var}\")", [{my_var, 100500}]). | |
EvalString("my_var+1", [{my_var, 100500}]). | |
EvalString("map.a", [{map, #{a=>1}}]). | |
EvalString("list |> Enum.reverse |> List.duplicate(2) |> List.flatten", [{list, [1, 2, 3]}]). |
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