Converts an integral number to its string representation as a byte vector. This is meant to be a common base implementation for all integral string conversion functions like to_str() or to_str_radix().

Arguments

• num - The number to convert. Accepts any number that implements the numeric traits.
• radix - Base to use. Accepts only the values 2-36.
• sign - How to emit the sign. Options are:
  • SignNone: No sign at all. Basically emits abs(num).
  • SignNeg: Only - on negative values.
  • SignAll: Both + on positive, and - on negative numbers.
• f - a callback which will be invoked for each ascii character which composes the string representation of this integer

Return value

A tuple containing the byte vector, and a boolean flag indicating whether it represents a special value like inf, -inf, NaN or not. It returns a tuple because there can be ambiguity between a special value and a number representation at higher bases.

Failure

• Fails if radix < 2 or radix > 36.