Re: Looking for efficient API for regexp library

[zevv]

This is also usable, although it requires the variables to receive the captures 
to be declared ahead of time:
    
    
    proc match(src: string, pat: string, c0: var string): bool =
      let caps = src.match(pat)
      if caps.len == 1:
        c0 = caps[0]
        return true
    
    proc match(src: string, pat: string, c0, c1: var string): bool =
      let caps = src.match(pat)
      if caps.len == 2:
        c0 = caps[0]
        c1 = caps[1]
        return true
    
    proc match(src: string, pat: string, c0, c1, c2: var string): bool =
      let caps = src.match(pat)
      if caps.len == 3:
        c0 = caps[0]
        c1 = caps[1]
        c2 = caps[1]
        return true
    
    let src = "3 foxes: 0x1234"
    
    var a, b: string
    if src.match("(%a+).*0x(%x+)", a, b):
      echo "a = " & a
      echo "b = " & b