/// <summary>
/// Initializes a new instance of the <see cref="T:XenonCore.Lexeme"/> class.
/// </summary>
/// <param name="type">Type.</param>
/// <param name="unit">Unit.</param>
/// <param name="value">Value.</param>
/// <param name="literal">Literal.</param>
public Lexeme(TokenClass type, SourceUnit unit, char value, object literal = null)
: this(type, unit, value.ToString(), literal)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="T:XenonCore.Lexer"/> class.
/// </summary>
/// <param name="source">Source.</param>
public Lexer(string source)
{
lexemes = new List <Lexeme> ();
this.source = SourceUnit.FromSource(source);
}