Symbelix
Parse symbolic expressions and evaluate them as programs.
Usage
$ iex -S mix
Erlang/OTP 21 [erts-10.2.1] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]
Interactive Elixir (1.8.1) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> Symbelix.Expression.parse("(one (two three) four)")
{:ok,
[
{:atom, 1, 'one'},
[{:atom, 1, 'two'}, {:atom, 1, 'three'}],
{:atom, 1, 'four'}
]}
iex(2)> Symbelix.Expression.parse("(å)")
{:error, {1, :symbolic_expression_lexer, {:illegal, [229]}}, 1}
iex(3)> Symbelix.Expression.parse(")")
{:error, {1, :symbolic_expression_parser, ['syntax error before: ', '\')\'']}}
iex(4)> defmodule Mathematician do
...(4)> use Symbelix.Library
...(4)> def add(a, b), do: a + b
...(4)> end
{:module, Mathematician,
<<70, 79, 82, 49, 0, 0, 8, 252, 66, 69, 65, 77, 65, 116, 85, 56, 0, 0, 1, 1, 0,
0, 0, 28, 20, 69, 108, 105, 120, 105, 114, 46, 77, 97, 116, 104, 101, 109,
97, 116, 105, 99, 105, 97, 110, 8, 95, ...>>, {:add, 2}}
iex(5)> Symbelix.run("(add 1 1)", Mathematician)
2
iex(6)> Symbelix.run("(public static void main)", Mathematician)
{:error,
"Unknown function (atom) 'public' at line 1 with 3 parameters: ('static', 'void', 'main')"}
iex(7)>
Installation
If available in Hex, the package can be installed
by adding symbelix to your list of dependencies in mix.exs:
def deps do
[
{:symbelix, "~> 0.1.0"}
]
endDocumentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/symbelix.