I found a solution: package main import ( “fmt” “reflect” “runtime” ) func foo() { } func GetFunctionName(i interface{}) string { return runtime.FuncForPC(reflect.ValueOf(i).Pointer()).Name() } func main() { // This will print “name: main.foo” fmt.Println(“name:”, GetFunctionName(foo)) }
To call a method on an object, first use reflect.ValueOf. Then find the method by name, and then finally call the found method. For example: package main import “fmt” import “reflect” type T struct {} func (t *T) Foo() { fmt.Println(“foo”) } func main() { var t T reflect.ValueOf(&t).MethodByName(“Foo”).Call([]reflect.Value{}) }
Note that there is a difference between equality and identity. The operators == and != in Go1 are comparing the values for equivalence (except when comparing channels), not for identity. Because these operators are trying not to mix equality and identity, Go1 is more consistent than pre-Go1 in this respect. Function equality is different from … Read more
Well I used reflect.ValueOf and then if it is a slice you can call Len() and Index() on the value to get the len of the slice and element at an index. I don’t think you will be able to use the range operate to do this. package main import “fmt” import “reflect” func main() … Read more
The Go json package marshals and unmarshals JSON from and to Go structures. Here’s a step-by-step example which sets the value of a struct field while carefully avoiding errors. The Go reflect package has a CanAddr function. func (v Value) CanAddr() bool CanAddr returns true if the value’s address can be obtained with Addr. Such … Read more
Some background First let’s clear some things related to types. Quoting from Spec: Types: A type determines the set of values and operations specific to values of that type. Types may be named or unnamed. Named types are specified by a (possibly qualified) type name; unnamed types are specified using a type literal, which composes … Read more
So, if I understand your question correctly, you are asking about how you can create an object when you just have the name of the type as string. So, for example, you might have a string “MyStruct” and you want to create an object of this type. Unfortunately, that’s not easily possible because Go is … Read more
As others have said, casting the pointer is considered bad form in Go. Here are examples of the proper Go way and the equivalent of the C array casting. WARNING: all code untested. The Right Way In this example, we are using the encoding/binary package to convert each set of 4 bytes into an int32. … Read more
In order to do that you need reflect. package main import ( “fmt” “reflect” ) func main() { // one way is to have a value of the type you want already a := 1 // reflect.New works kind of like the built-in function new // We’ll get a reflected pointer to a new int … Read more
The question is not quite explicit, it can be interpreted in 2 ways, to one of which the answer is no, not possible; and the other to which the answer is yes, it’s possible. At runtime If the type name is provided as a string value, then at runtime it’s not possible as types that … Read more