public Object visitBoolOp(BoolOp node) throws Exception {
boolopType type = node.getInternalOp();
String aVar, elseStart, end;
switch (type) {
case And: // a && b <-> (a._booland(b)) if a else False
aVar = getUnique("a$");
elseStart = getUnique("ifElse");
end = getUnique("ifEnd");
visit(node.getInternalValues().get(0));
addLine("POP " + aVar);
addLine("PUSH " + aVar);
addLine("JUMPIFFALSE " + elseStart); // if a
addLine("PUSH " + aVar);
visit(node.getInternalValues().get(1));
addLine("BOOLAND");
addLine("JUMP " + end);
addLine("LABEL " + elseStart);
addLine("PUSH False");
addLine("LABEL " + end);
break;
case Or: // a || b <-> (a._boolor(b)) if !a else True
aVar = getUnique("a$");
elseStart = getUnique("ifElse");
end = getUnique("ifEnd");
visit(node.getInternalValues().get(0));
addLine("POP " + aVar);
addLine("PUSH " + aVar);
addLine("NOT");
addLine("JUMPIFFALSE " + elseStart); // if !a
addLine("PUSH " + aVar);
visit(node.getInternalValues().get(1));
addLine("BOOLOR");
addLine("JUMP " + end);
addLine("LABEL " + elseStart);
addLine("PUSH True");
addLine("LABEL " + end);
break;
case UNDEFINED:
break;
}
return null;
}
