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git-svn-id: svn://10.0.0.236/trunk@32351 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
rogerl%netscape.com
1999-05-20 00:14:26 +00:00
parent 13a12a7a0e
commit a58c620f15
8 changed files with 189 additions and 0 deletions
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40
mozilla/js/js2/java/LogicalNode.java Normal file
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class LogicalNode extends BinaryNode {
LogicalNode(String aOp, ExpressionNode aLeft, ExpressionNode aRight)
{
super(aOp, aLeft, aRight);
}
void eval(Environment theEnv)
{
left.eval(theEnv);
double d = theEnv.theStack.pop().d;
if (op == "&&") {
if (d == 0.0)
theEnv.theStack.push(new StackValue(0));
else {
right.eval(theEnv);
d = theEnv.theStack.pop().d;
if (d == 0.0)
theEnv.theStack.push(new StackValue(0));
else
theEnv.theStack.push(new StackValue(1));
}
}
if (op == "||") {
if (d != 0.0)
theEnv.theStack.push(new StackValue(1));
else {
right.eval(theEnv);
d = theEnv.theStack.pop().d;
if (d != 0.0)
theEnv.theStack.push(new StackValue(1));
else
theEnv.theStack.push(new StackValue(0));
}
}
else
System.out.println("missing logical op " + op);
}
}