https://github.com/saulecabrera/leibniz

Math expression parser and evaluator
https://github.com/saulecabrera/leibniz

evaluator math-expression-parser

Last synced: about 1 year ago
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Math expression parser and evaluator

• Host: GitHub
• URL: https://github.com/saulecabrera/leibniz
• Owner: saulecabrera
• License: mit
• Created: 2018-04-02T00:58:33.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2018-05-06T14:30:54.000Z (about 8 years ago)
• Last Synced: 2025-03-18T09:11:27.675Z (about 1 year ago)
• Topics: evaluator, math-expression-parser
• Language: Erlang
• Size: 20.5 KB
• Stars: 22
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Leibniz

[![Build Status](https://travis-ci.org/saulecabrera/leibniz.svg?branch=master)](https://travis-ci.org/saulecabrera/leibniz)

[![codecov](https://codecov.io/gh/saulecabrera/leibniz/branch/master/graph/badge.svg)](https://codecov.io/gh/saulecabrera/leibniz)

Leibniz is a pure erlang/elixir math expression parser and evaluator.

## Installation

```elixir

defp deps() do

  [{:leibniz, "~> 1.0.0"}]

end

```

## Usage

[Documentation](https://hexdocs.pm/leibniz/api-reference.html)

Leibniz provides two core functionalities, evaluating valid math expressions and evaluating valid math expression in a given context.

#### Examples

Evaluating simple math expressions

```elixir

Leibniz.eval("1 + 1")

{:ok, 2}

```

Evaluating math expressions in a given context

```elixir

Leibniz.eval("10 * foo", foo: 10)

{:ok, 100}

```

```elixir

Leibniz.eval("1 * baz")

{:error, "value expected for the following dependencies: baz"}

```

## TODO

- [ ] Improve errors

- [ ] Provide a `parse/1` function

- [ ] Provide a `depencies/1` function

- [ ] Add trigonometric and other math functions

## LICENSE

MIT