The Status Nim style guide

Converters [language.converters]

Manual

Avoid using converters.

Pros

• Implicit conversions lead to low visual overhead of converting types

Cons

• Surprising conversions lead to ambiguous calls:

  converter toInt256*(a: int{lit}): Int256 = a.i256
  if stringValue.len > 32:
    ...
  

  Error: ambiguous call; both constants.>(a: Int256, b: int)[declared in constants.nim(76, 5)] and constants.>(a: UInt256, b: int)[declared in constants.nim(82, 5)] match for: (int, int literal(32))