gopp test how to parse ( foo, bar, baz ) lists.

test.go

package main

import (
	"fmt"
	"github.com/davecgh/go-spew/spew"
	"github.com/skelterjohn/gopp"
	"os"
	"strings"
)

const grammar = `
ignore: /^(?:[ \t\n])+/

Program => {type=Program} {field=List} <<List>>

List => {type=List} '(' [ {field=Field} <<Identifier>> {field=.} ( ',' {field=Field} <<Identifier>> )* ] ')'

Identifier => <identifier>

identifier = /([a-zA-Z]+)/
`

type Program struct {
	List List
}

type List struct {
	Field []string
}

const example = `
( foobar, quux, blabla )
`

func main() {
	df, err := gopp.NewDecoderFactory(grammar, "Program")
	if err != nil {
		fmt.Printf("Creating parser failed: %v\n", err)
		os.Exit(1)
	}

	var program Program

	dec := df.NewDecoder(strings.NewReader(example))

	if err := dec.Decode(&program); err != nil {
		fmt.Printf("Decoding failed: %v\n", err)
		os.Exit(1)
	}

	fmt.Printf("Object: %s\n", spew.Sdump(program))
}