static void Main(string[] args)
{
// в зависимости от наличия параметров командной строки разбираем
// либо файл с именем, переданным первым параметром, либо стандартный ввод
ICharStream input = args.Length == 1 ? (ICharStream) new ANTLRFileStream(args[0])
: (ICharStream) new ANTLRReaderStream(Console.In);
MyGrammarLexer lexer = new MyGrammarLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
MyGrammarParser parser = new MyGrammarParser(tokens);
ITree program = (ITree)parser.execute().Tree;
//AstNodePrinter.Print(program);
//AstNodePrinter.Print(program);
Semantic semantic = new Semantic(program);
AstNodePrinter.Print(program);
Codegenerator gen = new Codegenerator();
dynamic root = program;
string output = gen.Start(root, semantic.Context.MethodList, semantic.Context.Vars);
Console.WriteLine(output);
FileWorker file = new FileWorker();
file.WriteToFile(output);
Console.Read();
}
public static Func <IReadOnlyList <ExpressionTerm>, decimal> EvaluateExpression(string expression)
{
using (var stringReader = new StringReader(expression))
{
var inputStream = new AntlrInputStream(stringReader);
var lexer = new MyGrammarLexer(inputStream);
var tokens = new CommonTokenStream(lexer);
var parser = new MyGrammarParser(tokens);
var expressionTree = parser.expr();// lets call the parser on the whole thing
var visitor = new MyGrammarExpressionVisitor();
var func = visitor.Visit(expressionTree);
return(func);
}
}
public static (Func <IReadOnlyList <IGrammarTerm>, decimal> function, IReadOnlyList <IGrammarTerm> rawTerms) EvaluateExpression(string expression)
{
using (var stringReader = new StringReader(expression))
{
var inputStream = new AntlrInputStream(stringReader);
var lexer = new MyGrammarLexer(inputStream);
var tokens = new CommonTokenStream(lexer);
var parser = new MyGrammarParser(tokens);
var expressionTree = parser.expr();// lets parse the whole thing
var visitor = new MyGrammarExpressionVisitor();
// now that we have a "parsed expression" let's visit all the nodes.
var func = visitor.Visit(expressionTree);
return(func, visitor.Terms);
}
}
static void Main(string[] args)
{
string input = @"1 + (2 - 3) * 4";
var stream = new AntlrInputStream(input);
var lexer = new MyGrammarLexer(stream);
var tokens = new CommonTokenStream(lexer);
var parser = new MyGrammarParser(tokens);
var tree = parser.program();
var visitor = new MyGrammarVisitor();
var result = visitor.Visit(tree);
Console.WriteLine(tree.ToStringTree(parser));
Console.WriteLine(result);
Console.ReadKey();
}