How to print the string representation of "enum" in Go?

Question

I looked at various official sources on how to do this, but I cannot find it. Imagine you have the following enumeration (I know that golang has no enumerations in the classical sense):

package main import "fmt" type LogLevel int const ( Off LogLevel = iota Debug ) var level LogLevel = Debug func main() { fmt.Printf("Log Level: %s", level) } 

The closest I can get with the above %s , which gives me:

 Log Level: %!s(main.LogLevel=1) 

I would like to:

 Log Level: Debug 

Can anybody help me?

Answer 1

You cannot directly within the language, but there is a tool for creating supporting code: golang.org/x/tools/cmd/stringer

In the example in stringer docs

 type Pill int const ( Placebo Pill = iota Aspirin Ibuprofen Paracetamol Acetaminophen = Paracetamol ) 

Create code e.g.

 const _Pill_name = "PlaceboAspirinIbuprofenParacetamol" var _Pill_index = [...]uint8{0, 7, 14, 23, 34} func (i Pill) String() string { if i < 0 || i+1 >= Pill(len(_Pill_index)) { return fmt.Sprintf("Pill(%d)", i) } return _Pill_name[_Pill_index[i]:_Pill_index[i+1]] } 

Answer 2

This works for me:

level_str = fmt.SPrintf("%s", level)