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README.md

ExParsec

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A parser combinator library inspired by Parsec.

Usage

Add ExParsec as a dependency in your mix.exs file:

def deps do
  [ {:ex_parsec, "~> x.y.z"} ]
end

Replace x.y.z with whatever released version you would like to depend on.

After you are done, run mix deps.get in your shell to fetch and compile ExParsec. Start an interactive Elixir shell with iex -S mix.

iex> import ExParsec.Base; import ExParsec.Text
nil
iex> ExParsec.parse_value "foo", many(any_char())
{:ok, nil, ["f", "o", "o"]}
iex> ExParsec.parse_value "[x]", between(char("["), char("x"), char("]"))
{:ok, nil, "x"}
iex> ExParsec.parse_value "  spa ces  ",
                          sequence([skip(spaces),
                                    times(any_char(), 3),
                                    skip(space),
                                    times(any_char(), 3),
                                    skip(spaces),
                                    eof])
{:ok, nil, [nil, ["s", "p", "a"], nil, ["c", "e", "s"], nil, nil]}

Features

  • Can parse context-sensitive grammars.
  • High-quality, customizable error messages.
  • Full UTF-8 string support.
  • Non-text input such as binary data and tokens.
  • Support for theoretically infinitely large files.
  • Monadic parse blocks based on Elixir macros.
  • Simple, extensible API surface.

Examples

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A parser combinator library inspired by Parsec.

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