import re, macros

template `/` (s: string, flagSym: expr{sym}): expr {.immediate.} = 
    var flagList = {reStudy}
    # here the compiler complains `i` is undefined
    let flags = $flagSym
    # if flags.contains('i'):
    #     echo("here")
    #     flagList.add(reIgnoreCase)
 
    re(s, flagList)

let re1 = "  "/i

echo("  ".match(re1))