45 lines
1.0 KiB
Java
45 lines
1.0 KiB
Java
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import java.util.Vector;
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class SwitchNode extends ControlNode {
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SwitchNode(ExpressionNode e)
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{
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super(e);
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}
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void addCase(ExpressionNode e, ControlNode c)
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{
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if (e == null)
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defaultCode = c;
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else {
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caseExpr.addElement(e);
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caseCode.addElement(c);
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}
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}
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ControlNode eval(Environment theEnv)
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{
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ControlNode n = super.eval(theEnv);
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JSValue v = theEnv.theStack.pop();
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int count = caseExpr.size();
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for (int i = 0; i < count; i++) {
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ExpressionNode e = (ExpressionNode)(caseExpr.elementAt(i));
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e.eval(theEnv);
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v.eq(theEnv);
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if (theEnv.theStack.pop().toJSBoolean().isTrue())
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return (ControlNode)(caseCode.elementAt(i));
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}
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if (defaultCode != null)
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return defaultCode;
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else
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return n;
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}
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Vector caseExpr = new Vector();
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Vector caseCode = new Vector();
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ControlNode defaultCode;
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} |