peachcomb

Go Parser Combinator with Go Generics.

Roadmap

• stream input type
• complete input type
• custom input types
• combinator
• string parser
• bytes parser
• examples
  • JSON parser
  • tiny tree-walked interpreter

How to use

currently this library is so simple. you only should follow 2 steps as below.

• initializes parser.Parser[I, O]
• call the parser

Examples

JSON Parser

$ go run ./examples/jsonparser/ examples/jsonparser/example.json
{[{Go 1.18} {Nested {[{Empty {[]}} {Python 3.10.4}]}} {2darray {[{[a b] 2} {[c d] 2} {[e f] 2}] 3}}]}

Simplest Case

package main

import (
    "github.com/Drumato/peachcomb/pkg/strparse"
    "github.com/Drumato/peachcomb/pkg/combinator"
)

func main() {
	element := strparse.Digit1()
	separator := strparse.Rune('|')
	p := combinator.Separated1(element, separator)

	i := strparse.NewCompleteInput("123|456|789Drumato")
	_, o, err := p(i)
	fmt.Printf("%d\n", len(o))
	fmt.Printf("%s %s %s\n", o[0], o[1], o[2])
	fmt.Println(err)
}

$ go run main.go
3
123 456 789
<nil>