public static void Main(String[] args)
{
while (true)
{
Console.Write(">> ");
Lexer lexer = new Lexer(Console.ReadLine());
Parser parser = new CalculatorParser(lexer);
Console.WriteLine(parser.ParseExpression());
}
}
private static void Main(string[] args)
{
ShowHelp();
CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
var grammar = new CalculatorGrammar();
grammar.Initialize();
var lexer = grammar.Rule <Expression>("expression");
var parser = new CalculatorParser();
string expression = null;
while (expression != "")
{
expression = PromptLine();
if (string.IsNullOrEmpty(expression))
{
return;
}
using (var stringTextSource = new StringTextSource(expression))
using (var textScanner = new TextScanner(stringTextSource))
{
var readResult = lexer.Read(textScanner);
if (readResult != null)
{
var textRepresentation = readResult.Text;
var parseResult = parser.ParseExpression(readResult);
Console.WriteLine("{0}={1}", textRepresentation, parseResult);
}
else
{
Console.WriteLine("Invalid input detected");
Console.ForegroundColor = ConsoleColor.Red;
using (var reader = new TextSourceReader(stringTextSource))
{
Console.WriteLine(reader.ReadToEnd());
}
Console.ForegroundColor = DefaultForegroundColor;
}
}
}
}
