# NFP (Number Format Parser)

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Using NFP (Number Format Parser) you can get an Abstract Syntax Tree (AST) from Excel number format expression.

## Installation

```bash
go get github.com/xuri/nfp
```

## Example

```go
package main

import "github.com/xuri/nfp"

func main() {
    ps := nfp.NumberFormatParser()
    tokens := ps.Parse("_(* #,##0.00_);_(* (#,##0.00);_(* \"-\"??_);_(@_)")
    println(p.PrettyPrint())
}
```

Get AST

```text
<Positive>
      <RepeatsChar>
    # <HashPlaceHolder>
    <ThousandsSeparator>
    ## <HashPlaceHolder>
    0 <ZeroPlaceHolder>
    . <DecimalPoint>
    00 <ZeroPlaceHolder>
<Negative>
      <RepeatsChar>
    ( <Literal>
    # <HashPlaceHolder>
    , <ThousandsSeparator>
    ## <HashPlaceHolder>
    0 <ZeroPlaceHolder>
    . <DecimalPoint>
    00 <ZeroPlaceHolder>
    ) <Literal>
<Zero>
      <RepeatsChar>
    - <Literal>
    ?? <DigitalPlaceHolder>
<Text>
    @ <TextPlaceHolder>
```

## Contributing

Contributions are welcome! Open a pull request to fix a bug, or open an issue to discuss a new feature or change.

## Licenses

This program is under the terms of the BSD 3-Clause License. See [https://opensource.org/licenses/BSD-3-Clause](https://opensource.org/licenses/BSD-3-Clause).