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|
package json
import (
"errors"
. "github.com/vektah/goparsify"
)
var (
value Parser
_array = Map(And(WS, "[", Kleene(&value, And(WS, ",")), "]"), func(n *Node) *Node {
ret := []interface{}{}
for _, child := range n.Children[1].Children {
ret = append(ret, child.Result)
}
return &Node{Result: ret}
})
properties = Kleene(And(WS, String('"'), WS, ":", WS, &value), ",")
_object = Map(And(WS, "{", WS, properties, WS, "}"), func(n *Node) *Node {
ret := map[string]interface{}{}
for _, prop := range n.Children[1].Children {
ret[prop.Children[0].Token] = prop.Children[2].Result
}
return &Node{Result: ret}
})
_null = Map(And(WS, "null"), func(n *Node) *Node {
return &Node{Result: nil}
})
_true = Map(And(WS, "true"), func(n *Node) *Node {
return &Node{Result: true}
})
_false = Map(And(WS, "false"), func(n *Node) *Node {
return &Node{Result: false}
})
_string = Map(String('"'), func(n *Node) *Node {
return &Node{Result: n.Token}
})
Y = Map(And(&value, WS), func(n *Node) *Node {
return &Node{Result: n.Children[0].Result}
})
)
func init() {
value = Any(_null, _true, _false, _string, _array, _object)
}
func Unmarshal(input string) (interface{}, error) {
result, remaining, err := ParseString(Y, input)
if err != nil {
return result, err
}
if remaining != "" {
return result, errors.New("left unparsed: " + remaining)
}
return result, err
}
|
