forked from prataprc/goparsec
/
one.go
33 lines (26 loc) · 841 Bytes
/
one.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
package main
import "fmt"
import "github.com/prataprc/goparsec"
var input = `[a,[aa,[aaa],ab,ac],b,c,[ca,cb,cc,[cca]]]`
func main() {
var array parsec.Parser
ast := parsec.NewAST("one", 100)
id := parsec.And(
func(ns []parsec.ParsecNode) parsec.ParsecNode {
t := ns[0].(*parsec.Terminal)
t.Value = `"` + t.Value + `"`
return t
},
parsec.Token(`[a-z]+`, "ID"),
)
opensqr := parsec.Atom(`[`, "OPENSQR")
closesqr := parsec.Atom(`]`, "CLOSESQR")
comma := ast.Maybe("comma", nil, parsec.Atom(`,`, "COMMA"))
item := ast.OrdChoice("item", nil, id, &array)
itemsep := ast.And("itemsep", nil, item, comma)
items := ast.Kleene("items", nil, itemsep, nil)
array = ast.And("array", nil, opensqr, items, closesqr)
s := parsec.NewScanner([]byte(input))
node, _ := ast.Parsewith(array, s)
fmt.Println(node.GetValue())
}