Is it possible to get Enum name without creating func (TheEnum) String() string
in Golang?
const (
MERCURY = 1
VENUS = iota
EARTH
MARS
JUPITER
SATURN
URANUS
NEPTUNE
PLUTO
)
or is there a way to define constants on the fly? I found two ways struct-based and string-based, but both way make us retype each labels 1 more time (or copy-paste and quoting or using editor's macro)
AFAIK, no you can't do that without explicitly typing the name as a string. But you can use the stringer
tool from the standard tools package to do it for you:
For example, given this snippet,
package painkiller type Pill int const ( Placebo Pill = iota Aspirin Ibuprofen Paracetamol Acetaminophen = Paracetamol )
running this command
stringer -type=Pill
in the same directory will create the file pill_string.go, in package painkiller, containing a definition of
func (Pill) String() string
This is recommended to use with the go generate
command of Go 1.4+.