/// <summary>
/// Gets a pseudorandom <see langword="char"/>.
/// </summary>
/// <param name="charKind">Types of the character.</param>
/// <returns>A random char value.</returns>
public char NextChar(RandomCharKind charKind)
{
const string LettersUpper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string LettersLower = "abcdefghijklmnopqrstuvwxyz";
const string Digits = "0123456789";
const string Symbols = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";
Span <RandomCharKind> flags = stackalloc RandomCharKind[4];
int flagCount = 0;
if (HasFlag(charKind, RandomCharKind.Digit))
{
flags[flagCount++] = RandomCharKind.Digit;
}
if (HasFlag(charKind, RandomCharKind.Upper))
{
flags[flagCount++] = RandomCharKind.Upper;
}
if (HasFlag(charKind, RandomCharKind.Lower))
{
flags[flagCount++] = RandomCharKind.Lower;
}
if (HasFlag(charKind, RandomCharKind.Symbol))
{
flags[flagCount++] = RandomCharKind.Symbol;
}
RandomCharKind flag = flags[NextInt(0, flagCount - 1)];
return(flag switch
{
RandomCharKind.Upper => LettersUpper[NextInt(0, LettersUpper.Length - 1)],
RandomCharKind.Lower => LettersLower[NextInt(0, LettersLower.Length - 1)],
RandomCharKind.Digit => Digits[NextInt(0, Digits.Length - 1)],
RandomCharKind.Symbol => Symbols[NextInt(0, Symbols.Length - 1)],
_ => default,
public char NextChar(RandomCharKind randomChar)
{
return(default);
