minijava/SymTableVis.java


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package minijava;

import syntaxtree.*;
import visitor.*;
import java.util.*;

/**
 * Provides default methods which visit each node in the tree in depth-first
 * order.  Your visitors may extend this class.
 */
public class SymTableVis<R,A> implements GJVisitor<R,A> {

    public HashMap<String,String> symt = new HashMap<>();

    private void print_filter(String message) {
        boolean debug = true;
        if (debug)
            System.out.println(message);
    }

    public R visit(VarDeclaraction n, A argu) {
        R _ret=null;

        this.print_filter("Processing declaration");

        String type = "";
        switch (n.f0.f0.which) {
        case 2:
            type = "Int"; break;
        default:
            this.print_filter("Unsupported case");
        }

        String id = n.f1.f0.tokenImage;

        this.printfilter("Inserting " + id + " => " + type);
        // Safe?
        symt.put(id, type);

        return _ret;
    }

}