Hi I see, thanks MPrades
I am new in golang and still learning while developing something. Will go
and read up how to call a method call using reflection.
Thanks
On Thursday, June 22, 2017 at 1:00:02 AM UTC+8, M P r a d e s wrote:
>
> Nowhere in the piece of code you pasted you are calling a function, you
> are trying to call a struct method on the other hand ( method.Call ). Your
> error comes from something else and not the fact Go removes unused
> functions.
>
> Furthermore, if the number of possible struct methods to call is finite,
> you don't need reflection, you can use a switch statement, thus keeping
> your code type safe at compilation time.
>
> Le mercredi 21 juin 2017 16:18:20 UTC+2, John Kenedy a écrit :
>>
>> Below is some part of the code
>>
>>
>> func (*ScrapperMin) ExecuteFunction(funcname string, obj interface{},
>> args [][]string) (interface{}, error) {
>> inputs := make([]reflect.Value, 0)
>> inputs2 := make([]string, 0)
>> //var single = true
>> var tt = make([]reflect.Value, 0)
>> for i, _ := range args {
>> if len(args[i]) == 1 {
>> tt = append(tt, reflect.ValueOf(args[i][0]))
>> inputs2 = append(inputs2, args[i][0])
>> } else {
>> tt = append(tt, reflect.ValueOf(args[i]))
>> inputs2 = append(inputs2, args[i][0])
>> //single = false
>> }
>> inputs = append(inputs, reflect.ValueOf(tt))
>> }
>> method := reflect.ValueOf(obj).MethodByName(funcname)
>> if method.IsValid() == false {
>> return nil, errors.New("Invalid Method Name")
>> }
>>
>> ret := method.Call(tt)
>> return ret, nil
>> }
>>
>> obj is a struct object that has 3 possibilities, a SyntaxCommand struct,
>> a MathInteger struct or a CookieWebClient struct which contains different
>> set of functions.
>> The funcname is the function name intended to call on this object which
>> is retrieved from file during runtime.
>>
>> Questions :
>> 1. [][]args, if the second dimension slice has only one slice string (len
>> 1), it will assumg the function accept string as argument, if it is more
>> than 1 string it will pass an array, I am not sure
>> reflect.ValueOf([]string) will be correct to pass array of string to
>> destination function.. The second argument is second parameter of the
>> function.
>> 2. The program keep crashing and said invalid address, so I am assuming
>> the function didn't get compiled into binaries because it was never refer
>> in any part of the code
>> 3. the method.IsValid() returns true, it seem to be able to know it is a
>> correct method, but I am not sure the mechanism
>>
>> Thank you for your help
>>
>> On Wednesday, June 21, 2017 at 8:44:55 PM UTC+8, John Kenedy wrote:
>>>
>>> I read somewhere that Go will remove unused functions so that it wont be
>>> included into binaries when it can prove no code is using it.
>>>
>>> However I am using reflection to call functions that are inside the
>>> binaries without first having any variable using it.
>>>
>>> Is there compiler option to include every functions in source code into
>>> binary so that it will be used at runtime upon request?
>>>
>>> PS : Please don't suggest to call those unused functions and discard the
>>> output just to make it compiles into binary
>>>
>>> Thank you
>>>
>>
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
