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defmodule ElixirMathParser.Main do
def process_parse({:error, result}) do
{line, _file, errors} = result
err = Enum.join(errors)
err <> " (line " <> to_string(line) <> ")"
end
def process_parse({:ok, tree}) do
IO.puts("\nParse tree")
IO.inspect(tree, pretty: true)
case ElixirMathParser.process_tree(tree) do
{:ok, _} -> :ok
{:error, line, reason} -> reason <> " (line " <> to_string(line) <> ")"
{:error, reason} -> reason
end
end
def main(args) do
filename = Enum.fetch!(args, 0)
IO.puts("Parsing #{filename}")
text = File.read!(filename)
{:ok, tokens, line} = :elixir_math_parser_lexer.string(String.to_charlist(text))
IO.puts("Parsed #{filename}, stopped at line #{line}")
res = process_parse(:elixir_math_parser.parse(tokens))
if res != :ok, do: IO.puts(:stderr, "\n" <> res)
end
end
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