// literal consumes a literal from d.data[d.off-1:], decoding into the value v.
// The first byte of the literal has been read already
// (that's how the caller knows it's a literal).
func (d *decodeState) literal(v reflect.Value) {
// All bytes inside literal return scanContinue op code.
start := d.off - 1
op := d.scanWhile(scanContinue)
// Scan read one byte too far; back up.
d.off--
d.scan.undo(op)
item := d.data[start:d.off]
// Check for unmarshaler.
wantptr := item[0] == 'n' // null
unmarshaler, pv := d.indirect(v, wantptr)
if unmarshaler != nil {
err := unmarshaler.UnmarshalJSON(item)
if err != nil {
d.error(err)
}
return
}
v = pv
switch c := item[0]; c {
case 'n': // null
switch v.(type) {
default:
d.saveError(&UnmarshalTypeError{"null", v.Type()})
case *reflect.InterfaceValue, *reflect.PtrValue, *reflect.MapValue:
v.SetValue(nil)
}
case 't', 'f': // true, false
value := c == 't'
switch v := v.(type) {
default:
d.saveError(&UnmarshalTypeError{"bool", v.Type()})
case *reflect.BoolValue:
v.Set(value)
case *reflect.InterfaceValue:
v.Set(reflect.NewValue(value))
}
case '"': // string
s, ok := unquote(item)
if !ok {
d.error(errPhase)
}
switch v := v.(type) {
default:
d.saveError(&UnmarshalTypeError{"string", v.Type()})
case *reflect.StringValue:
v.Set(s)
case *reflect.InterfaceValue:
v.Set(reflect.NewValue(s))
}
default: // number
if c != '-' && (c < '0' || c > '9') {
d.error(errPhase)
}
s := string(item)
switch v := v.(type) {
default:
d.error(&UnmarshalTypeError{"number", v.Type()})
case *reflect.InterfaceValue:
n, err := strconv.Atof64(s)
if err != nil {
d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
break
}
v.Set(reflect.NewValue(n))
case *reflect.IntValue:
n, err := strconv.Atoi64(s)
if err != nil || v.Overflow(n) {
d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
break
}
v.Set(n)
case *reflect.UintValue:
n, err := strconv.Atoui64(s)
if err != nil || v.Overflow(n) {
d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
break
}
v.Set(n)
case *reflect.FloatValue:
n, err := strconv.AtofN(s, v.Type().Bits())
if err != nil || v.Overflow(n) {
d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
break
}
v.Set(n)
}
}
}
