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import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import javax.swing.*;
import org.antlr.v4.gui.TreeViewer;
import org.antlr.v4.runtime.*;
import ast.*;
import ast.nodes.*;
import parser.*;
import semanticanalysis.*;
import semanticanalysis.Share;
public class Main {
public static void main(String[] args) {
if (args.length != 1) {
System.err
.println(
"You must execute this program with a file parameter.\nUsage: java -cp lib/antlr-4.13.1-complete.jar:out Main <file.py>");
return;
}
try {
String fileStr = args[0];
System.out.println(fileStr);
System.out.println(readFile(fileStr));
CharStream cs = CharStreams.fromFileName(fileStr);
Python3Lexer lexer = new Python3Lexer(cs);
CommonTokenStream tokens = new CommonTokenStream(lexer);
Python3Parser parser = new Python3Parser(tokens);
Python3Parser.RootContext tree = parser.root();
JFrame frame = new JFrame("Parse Tree");
JPanel panel = new JPanel();
TreeViewer viewer = new TreeViewer(Arrays.asList(parser.getRuleNames()),
tree);
viewer.setScale(1); // Zoom factor
panel.add(viewer);
frame.add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800, 600);
frame.setVisible(true);
if (tree == null) {
System.err.println("The tree is null.");
return;
}
if (parser.getNumberOfSyntaxErrors() > 0) {
System.err.println("Error on program parsing.");
return;
}
Python3VisitorImpl visitor = new Python3VisitorImpl();
SymbolTable ST = new SymbolTable();
Node ast = visitor.visit(tree);
ArrayList<SemanticError> errorsWithDup = ast.checkSemantics(ST, 0);
ArrayList<SemanticError> errors = Share.removeDuplicates(errorsWithDup);
if (errors.size() > 0) {
System.out.println("You had " + errors.size() + " errors:");
for (SemanticError e : errors) {
System.out.println("\t" + e);
}
} else {
System.out.println("Visualizing AST...");
System.out.println(ast.toPrint(""));
}
} catch (Exception e) {
e.printStackTrace();
}
}
private static String readFile(String filePath) throws IOException {
StringBuilder content = new StringBuilder();
try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
String line;
while ((line = reader.readLine()) != null) {
content.append(line).append("\n");
}
}
return content.toString();
}
}
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