error parsing regexp: invalid escape sequence: `\s`

[shinkeika]

error parsing regexp: invalid escape sequence: \s

[ryanolee]

Probably a bit of a mute point at this stage but for anyone else looking you should be able to resolve this by passing the PearlX flag to the parser:

regen.NewGenerator(`4\s{0,1}lata`, &regen.GeneratorArgs{
        Flags: syntax.PerlX,
})

See https://pkg.go.dev/regexp/syntax#Flags for reference