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package minijava.minijava2piglet;
import java.io.InputStream;
import aux.CCPrinter;
import minijava.MiniJavaParser;
import minijava.ParseException;
import minijava.TokenMgrError;
import minijava.symboltable.MClasses;
import minijava.syntaxtree.Node;
import minijava.visitor.BuildSymbolTableVisitor;
import minijava.visitor.GenPigletVisitor;
public class Main {
public static CCPrinter execute(InputStream stream) {
try {
new MiniJavaParser(stream);
Node root = MiniJavaParser.Goal();
// 初始化符号表中最大的类
MClasses my_classes = new MClasses();
// 遍历抽象语法树，建立符号表，检查是否重复定义
root.accept(new BuildSymbolTableVisitor(), my_classes);
// 建立类的继承关系，寻找循环继承
my_classes.buildClassRelation();
// 对每个类，建立其可用方法列表
for (int i=0; i<my_classes.mj_classes.size(); i++) {
my_classes.mj_classes.elementAt(i).buildMethodRef();
}
/*
* TODO: Implement your own Visitors and other classes.
*
*/
GenPigletVisitor v = new GenPigletVisitor();
root.accept(v, my_classes);
return v.prn;
} catch(TokenMgrError e){
//Handle Lexical Errors
e.printStackTrace();
} catch (ParseException e){
//Handle Grammar Errors
e.printStackTrace();
} catch(Exception e){
e.printStackTrace();
}
return null;
}
public static void main(String[] args) {
execute(System.in).printAll();
}
}
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