Recommendation: Use const instead of plain numbers in internal map

[godcong]

The final generated code now looks like this:

const (
    // ColorBlack is a Color of type Black.
    ColorBlack Color = iota
    // ColorWhite is a Color of type White.
    ColorWhite
    // ColorRed is a Color of type Red.
    ColorRed
    // ColorGreen is a Color of type Green.
    // Green starts with 33
    ColorGreen Color = iota + 30
    // ColorBlue is a Color of type Blue.
    ColorBlue
    // ColorGrey is a Color of type Grey.
    ColorGrey
    // ColorYellow is a Color of type Yellow.
    ColorYellow
    // ColorBlueGreen is a Color of type Blue-Green.
    ColorBlueGreen
    // ColorRedOrange is a Color of type Red-Orange.
    ColorRedOrange
    // ColorYellowGreen is a Color of type Yellow_green.
    ColorYellowGreen
    // ColorRedOrangeBlue is a Color of type Red-Orange-Blue.
    ColorRedOrangeBlue
)

const _ColorName = "BlackWhiteRedGreenBluegreyyellowblue-greenred-orangeyellow_greenred-orange-blue"

var _ColorMap = map[Color]string{
    0:  _ColorName[0:5],
    1:  _ColorName[5:10],
    2:  _ColorName[10:13],
    33: _ColorName[13:18],
    34: _ColorName[18:22],
    35: _ColorName[22:26],
    36: _ColorName[26:32],
    37: _ColorName[32:42],
    38: _ColorName[42:52],
    39: _ColorName[52:64],
    40: _ColorName[64:79],
}

var _ColorValue = map[string]Color{
    _ColorName[0:5]:                    0,
    strings.ToLower(_ColorName[0:5]):   0,
    _ColorName[5:10]:                   1,
    strings.ToLower(_ColorName[5:10]):  1,
    _ColorName[10:13]:                  2,
    strings.ToLower(_ColorName[10:13]): 2,
    _ColorName[13:18]:                  33,
    strings.ToLower(_ColorName[13:18]): 33,
    _ColorName[18:22]:                  34,
    strings.ToLower(_ColorName[18:22]): 34,
    _ColorName[22:26]:                  35,
    strings.ToLower(_ColorName[22:26]): 35,
    _ColorName[26:32]:                  36,
    strings.ToLower(_ColorName[26:32]): 36,
    _ColorName[32:42]:                  37,
    strings.ToLower(_ColorName[32:42]): 37,
    _ColorName[42:52]:                  38,
    strings.ToLower(_ColorName[42:52]): 38,
    _ColorName[52:64]:                  39,
    strings.ToLower(_ColorName[52:64]): 39,
    _ColorName[64:79]:                  40,
    strings.ToLower(_ColorName[64:79]): 40,
}

where the numbers are not very easy to read
I think it would be easier to read if it could look like the following:

var _ColorMap = map[Color]string{
    ColorBlack:  _ColorName[0:5],
    ColorWhite:  _ColorName[5:10],
    ...
}

var _ColorValue = map[string]Color{
    _ColorName[0:5]:                    ColorBlack,
    strings.ToLower(_ColorName[0:5]):   ColorBlack,
    _ColorName[5:10]:                   ColorWhite,
    strings.ToLower(_ColorName[5:10]):  ColorWhite,
    ...

[abice]

@godcong thanks for the idea!