Range.cs

namespace ReadableRex.Patterns
{
    /// <summary>
    /// Provides methods to create patterns representing ranges of characters or integers.
    /// </summary>
    /// <remarks>The <see cref="Range"/> class offers static methods to generate patterns for specific ranges
    /// of characters or integers, as well as predefined patterns for common character ranges such as lowercase and
    /// uppercase letters.</remarks>
    public class Range
    {
        /// <summary>
        /// Creates a new <see cref="Pattern"/> that represents a range of characters.
        /// </summary>
        /// <param name="from">The starting character of the range.</param>
        /// <param name="to">The ending character of the range.</param>
        /// <returns>A <see cref="Pattern"/> representing the range from <paramref name="from"/> to <paramref name="to"/>.</returns>
        public static Pattern Of(char from, char to)
        {
            return new Pattern(from + "-" + to);
        }
        /// <summary>
        /// Creates a new <see cref="Pattern"/> instance representing a range.
        /// </summary>
        /// <param name="from">The starting value of the range.</param>
        /// <param name="to">The ending value of the range.</param>
        /// <returns>A <see cref="Pattern"/> object that represents the specified range.</returns>
        public static Pattern Of(int from, int to)
        {
            return new Pattern(from + "-" + to);
        }
        
        /// <summary>
        /// Gets a pattern that matches any uppercase or lowercase letter.
        /// </summary>
        public static Pattern AnyLetter
        {
            get
            {
                return new Pattern("a-zA-Z");
            }
        }

        /// <summary>
        /// Gets a pattern that matches any lowercase letter from 'a' to 'z'.
        /// </summary>
        public static Pattern AnyLowercaseLetter
        {
            get
            {
                return new Pattern("a-z");
            }
        }

        /// <summary>
        /// Gets a pattern that matches any uppercase letter from A to Z.
        /// </summary>
        public static Pattern AnyUppercaseLetter
        {
            get
            {
                return new Pattern("A-Z");
            }
        }
    }
}