lotus/lib/jsonrpc/util.go
Jakub Sztandera 06ce4f21c5 Warn on non zero result with error
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
2020-03-14 15:08:24 +01:00

56 lines
958 B
Go

package jsonrpc
import (
"encoding/json"
"fmt"
"reflect"
)
type param struct {
data []byte // from unmarshal
v reflect.Value // to marshal
}
func (p *param) UnmarshalJSON(raw []byte) error {
p.data = make([]byte, len(raw))
copy(p.data, raw)
return nil
}
func (p *param) MarshalJSON() ([]byte, error) {
if p.v.Kind() == reflect.Invalid {
return p.data, nil
}
return json.Marshal(p.v.Interface())
}
// processFuncOut finds value and error Outs in function
func processFuncOut(funcType reflect.Type) (valOut int, errOut int, n int) {
errOut = -1 // -1 if not found
valOut = -1
n = funcType.NumOut()
switch n {
case 0:
case 1:
if funcType.Out(0) == errorType {
errOut = 0
} else {
valOut = 0
}
case 2:
valOut = 0
errOut = 1
if funcType.Out(1) != errorType {
panic("expected error as second return value")
}
default:
errstr := fmt.Sprintf("too many return values: %s", funcType)
panic(errstr)
}
return
}