public static IParseTree Parse(string input)
{
var str = new AntlrInputStream(input);
var lexer = new ArithmeticLexer(str);
Lexer = lexer;
var tokens = new CommonTokenStream(lexer);
TokenStream = tokens;
var parser = new ArithmeticParser(tokens);
Parser = parser;
var tree = parser.file();
Tree = tree;
return(tree);
}
static void Try(string input)
{
var str = new AntlrInputStream(input);
System.Console.WriteLine(input);
var lexer = new ArithmeticLexer(str);
var tokens = new CommonTokenStream(lexer);
var parser = new ArithmeticParser(tokens);
var listener_lexer = new ErrorListener <int>();
var listener_parser = new ErrorListener <IToken>();
lexer.AddErrorListener(listener_lexer);
parser.AddErrorListener(listener_parser);
var tree = parser.file();
if (listener_lexer.had_error || listener_parser.had_error)
{
System.Console.WriteLine("error in parse.");
}
else
{
System.Console.WriteLine("parse completed.");
}
}
static void Main(string[] args)
{
bool show_tree = false;
bool show_tokens = false;
string file_name = null;
string input = null;
for (int i = 0; i < args.Length; ++i)
{
if (args[i].Equals("-tokens"))
{
show_tokens = true;
continue;
}
else if (args[i].Equals("-tree"))
{
show_tree = true;
continue;
}
else if (args[i].Equals("-input"))
{
input = args[++i];
}
else if (args[i].Equals("-file"))
{
file_name = args[++i];
}
}
ICharStream str = null;
if (input == null && file_name == null)
{
StringBuilder sb = new StringBuilder();
int ch;
while ((ch = System.Console.Read()) != -1)
{
sb.Append((char)ch);
}
input = sb.ToString();
str = CharStreams.fromString(input);
}
else if (input != null)
{
str = CharStreams.fromString(input);
}
else if (file_name != null)
{
str = CharStreams.fromPath(file_name);
}
var lexer = new ArithmeticLexer(str);
if (show_tokens)
{
StringBuilder new_s = new StringBuilder();
for (int i = 0; ; ++i)
{
var ro_token = lexer.NextToken();
var token = (CommonToken)ro_token;
token.TokenIndex = i;
new_s.AppendLine(token.ToString());
if (token.Type == Antlr4.Runtime.TokenConstants.EOF)
{
break;
}
}
System.Console.Error.WriteLine(new_s.ToString());
lexer.Reset();
}
var tokens = new CommonTokenStream(lexer);
var parser = new ArithmeticParser(tokens);
var listener_lexer = new ErrorListener <int>();
var listener_parser = new ErrorListener <IToken>();
lexer.AddErrorListener(listener_lexer);
parser.AddErrorListener(listener_parser);
var tree = parser.file();
if (listener_lexer.had_error || listener_parser.had_error)
{
System.Console.Error.WriteLine("parse failed.");
}
else
{
System.Console.Error.WriteLine("parse succeeded.");
}
if (show_tree)
{
System.Console.Error.WriteLine(tree.ToStringTree(parser));
}
System.Environment.Exit(listener_lexer.had_error || listener_parser.had_error ? 1 : 0);
}