static void Main(string[] args)
{
string input;
do
{
try
{
Console.Clear();
Console.Write("Zadajte vzorec:");
input = Console.ReadLine();
ILexer lexer = Setup.Instance.GetLexer();
ILexerContext lexerContext = Setup.Instance.CreateLexerContext(input);
LexerResult lexerResult = lexer.Evaluate(lexerContext);
IParser parser = Setup.Instance.GetParser();
IParserContext parserContext = Setup.Instance.CreateParserContext(lexerResult.PostfixNotation);
ParserResult parserResult = parser.Evaluate(parserContext);
Visitor evaluator = new Evaluator(Setup.Instance.CreateEvaluationContext());
Visitor differentiator = new Differentiator(SyntaxToken.Variable("x"));
Console.WriteLine($"Vstup: {input}");
Console.WriteLine($"Výsledok: {evaluator.Visit(parserResult.Tree)}");
Console.WriteLine($"Derivácia: {differentiator.Visit(parserResult.Tree)}");
}
catch (Exception ex)
{
Console.Clear();
Console.WriteLine("Vyskytla sa chyba!");
Console.WriteLine("Ohláste to prosím Maťovi.");
Console.WriteLine();
Console.WriteLine("Za pochopenie ďakujeme!");
Console.WriteLine("Váš kalkulátor");
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Chybová správa");
Console.WriteLine(ex.Message);
}
Console.ReadLine();
}while (true);
}
public LexerResult Evaluate(ILexerContext input)
{
InputStream stream = input.Stream;
List <LexicToken> tokens = new List <LexicToken>();
while (!stream.IsEmpty)
{
InputStream copy = stream;
foreach (TokenReader reader in input.Readers)
{
LexicToken token = null;
stream = reader.TryRead(stream, out token);
if (token != null && !(token is WhitespaceLexicToken))
{
if (token is NamedLexicToken)
{
NamedLexicToken nlt = (NamedLexicToken)token;
if (input.IsFunction(nlt.Name))
{
token = new FunctionLexicToken(nlt.Name);
}
else
{
token = new VariableLexicToken(nlt.Name);
}
}
tokens.Add(token);
break;
}
}
if (stream == copy)
{
throw new ParserException($"Unexpected character '{stream.Content[0]}' at position {stream.Position}");
}
}
this.ValidateLexingOutput(tokens);
return(new LexerResult(tokens));
}