goparsify/json/json.go
2021-05-07 21:52:01 +02:00

43 lines
1.0 KiB
Go

package json
import (
. "kesim.org/goparsify"
)
var (
_value Parser
_null = Bind("null", nil)
_true = Bind("true", true)
_false = Bind("false", false)
_string = Map(StringLit(`"`), func(r *Result) { r.Result = r.Token })
_number = NumberLit()
_properties = Some(Seq(StringLit(`"`), ":", &_value), ",")
_array = Seq("[", Cut(), Some(&_value, ","), "]").Map(func(n *Result) {
ret := []interface{}{}
for _, child := range n.Child[2].Child {
ret = append(ret, child.Result)
}
n.Result = ret
})
_object = Seq("{", Cut(), _properties, "}").Map(func(n *Result) {
ret := map[string]interface{}{}
for _, prop := range n.Child[2].Child {
ret[prop.Child[0].Token] = prop.Child[2].Result
}
n.Result = ret
})
)
func init() {
_value = Any(_null, _true, _false, _string, _number, _array, _object)
}
// Unmarshall json string into map[string]interface{} or []interface{}
func Unmarshal(input string) (interface{}, error) {
return Run(_value, input, ASCIIWhitespace)
}