private static Result <string> RegularStringParse(string input)
{
if (input.Length < 2)
{
return(Result.Fail <string>($"string literial length must > 2."));
}
if (input.First() != input.Last())
{
return(Result.Fail <string>($"string literial's first and last char must be the same."));
}
var firstChar = input[0];
var escapedChar = Details.GetEscapedChar(firstChar);
if (escapedChar.IsFailure)
{
return(Result.Fail <string>(escapedChar.Error));
}
var inner = input.Substring(1, input.Length - 2);
return(Result.Ok(Details.EscapeNoCheck(inner, escapedChar.Value)));
}