1 package httpbinding
2
3 import (
4 "fmt"
5 "reflect"
6 )
7
8 func reflectCall(funcValue reflect.Value, args []interface{}) error {
9 argValues := make([]reflect.Value, len(args))
10
11 for i, v := range args {
12 value := reflect.ValueOf(v)
13 argValues[i] = value
14 }
15
16 retValues := funcValue.Call(argValues)
17 if len(retValues) > 0 {
18 errValue := retValues[0]
19
20 if typeName := errValue.Type().Name(); typeName != "error" {
21 panic(fmt.Sprintf("expected first return argument to be error but got %v", typeName))
22 }
23
24 if errValue.IsNil() {
25 return nil
26 }
27
28 if err, ok := errValue.Interface().(error); ok {
29 return err
30 }
31
32 panic(fmt.Sprintf("expected %v to return error type, but got %v", funcValue.Type().String(), retValues[0].Type().String()))
33 }
34
35 return nil
36 }
37
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