zeno

zeno

zeno is a math expression parser capable of:

• Generating a postfix equivalent to given expression
• Create a binary operation tree
• Calculate the result of the expression (without variables)
• Generate LaTeX representation of an operation tree

Install

Use golang package manager to install zeno

$ go get -u github.com/xzebra/zeno

Usage

import "github.com/xzebra/zeno"

int main() {
    expression := "-2.1483*3.14^3+4"
    // Get a postfix representation of the expression
    postfix, _ := zeno.ToPostfix(expression)
    fmt.Println(postfix) // "-2.1483 3.14 3 ^ * 4 +"

    // Get the binary tree representation
    tree, _ := zeno.PostfixToTree(postfix)
    // You can also get it using ToTree
    tree, _ = zeno.ToTree(expression)

    // After that you can get the result (if the expression 
    // doesn't have variables) or its LaTeX representation.
    fmt.Println(tree.Calculate()) // -62.509529055200005
    fmt.Println(tree.LaTeX()) // "neg(2.1483)\cdot3.14^3+4"
}

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change. Remember to update tests according to the changes.

License

MIT