How to Get Go Enum Names Without a String() Function?

How to Obtain Enum Names Without the String() Function?

Go enumerations, achieved through iota, lack an explicit String() function, limiting the direct retrieval of enum names as strings. This article explores alternatives to overcome this limitation and obtain enum names without retyping labels.

One possible solution is utilizing the stringer tool from the standard tools package. This tool automates the generation of a String() function for your enum type.

For instance, consider the following enum definition:

const (
    MERCURY = 1
    VENUS = iota
    EARTH
    MARS
    JUPITER
    SATURN
    URANUS
    NEPTUNE
    PLUTO
)

To generate the String() function for this enum, execute the following command in the terminal:

stringer -type=Planet

This command will create the file planet_string.go in the current working directory, containing the generated function. The function can now be used to obtain planet names as strings.

Additionally, you can consider using struct-based or string-based constants. While these approaches require retyping labels once, they provide greater flexibility in certain scenarios.

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