anchor.diff:          let spos        = pos
           let mutable uf  = 0.0
           if x.tryParse_UInt (true, &uf) then
  -          r <- (float uf) * (pow10 (spos - pos))
  +          r <- uf * (pow10 (spos - pos))
             true
           else
             false
  
positive.code: #else
      member inline x.tryConsume_Delimiter (first : bool) : bool =
  #endif
        if first then true
        else
          x.tryConsume_Char       ','
          && x.consume_WhiteSpace ()
  
      member x.tryParse_ArrayValues (first : bool) : bool =
        if x.test_Char ']' then
  
negative.code:         result && x.consume_WhiteSpace ()
  
      member x.tryParse_Eos () : bool =
        x.eos || (v.Expected (pos, Tokens.EOS); false)
  
    [<AbstractClass>]
    [<NoEquality>]
  