Examples of com.google.gwt.dev.js.ast.JsPrefixOperation

com.google.gwt.dev.js.ast.JsPrefixOperation
A JavaScript prefix operation.

    }


    @Override
    public void endVisit(JPrefixOperation x, Context ctx) {
      JsUnaryOperation op =
          new JsPrefixOperation(x.getSourceInfo(), JavaToJsOperatorMap.get(x.getOp()),
              ((JsExpression) pop())); // arg
      push(op);
    }

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  private JsExpression mapDeleteProp(Node node) throws JsParserException {
    Node from = node.getFirstChild();
    JsExpression to = mapExpression(from);
    if (to instanceof JsNameRef) {
      return new JsPrefixOperation(makeSourceInfo(node),
          JsUnaryOperator.DELETE, to);
    } else if (to instanceof JsArrayAccess) {
      return new JsPrefixOperation(makeSourceInfo(node),
          JsUnaryOperator.DELETE, to);
    } else {
      throw createParserException(
          "'delete' can only operate on property names and array elements",
          from);

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  private JsExpression mapPrefixOperation(JsUnaryOperator op, Node node)
      throws JsParserException {
    Node from = node.getFirstChild();
    JsExpression to = mapExpression(from);
    return new JsPrefixOperation(makeSourceInfo(node), op, to);
  }

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        JsBinaryOperation op = new JsBinaryOperation(x.getSourceInfo(),
            JsBinaryOperator.OR, x.getIfExpr(), elseExpr);
        ctx.replaceMe(accept(op.makeStmt()));
      } else if (thenIsEmpty && !elseIsEmpty) {
        // Convert "if (a()) {} else {stuff}" => "if (!a()) {stuff}".
        JsUnaryOperation negatedOperation = new JsPrefixOperation(
            x.getSourceInfo(), JsUnaryOperator.NOT, x.getIfExpr());
        JsIf newIf = new JsIf(x.getSourceInfo(), negatedOperation, elseStmt,
            null);
        ctx.replaceMe(accept(newIf));
      } else if (elseIsEmpty && thenExpr != null) {

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      }


      if (evalBooleanContext.contains(x)) {
        if ((x.getOperator() == JsUnaryOperator.NOT)
            && (x.getArg() instanceof JsPrefixOperation)) {
          JsPrefixOperation arg = (JsPrefixOperation) x.getArg();
          if (arg.getOperator() == JsUnaryOperator.NOT) {
            ctx.replaceMe(arg.getArg());
            return;
          }
        }
      }
    }

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      stack.push(toReturn);
    }


    @Override
    public void endVisit(JsPrefixOperation x, JsContext ctx) {
      JsPrefixOperation toReturn = new JsPrefixOperation(x.getSourceInfo(),
          x.getOperator());
      toReturn.setArg(stack.pop());
      stack.push(toReturn);
    }

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      push(op);
    }


    @Override
    public void endVisit(JPrefixOperation x, Context ctx) {
      JsUnaryOperation op = new JsPrefixOperation(x.getSourceInfo(),
          JavaToJsOperatorMap.get(x.getOp()), ((JsExpression) pop())); // arg
      push(op);
    }

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    }


    @Override
    public void endVisit(JPrefixOperation x, Context ctx) {
      JsUnaryOperation op =
          new JsPrefixOperation(x.getSourceInfo(), JavaToJsOperatorMap.get(x.getOp()),
              ((JsExpression) pop())); // arg
      push(op);
    }

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      // var gwtOnLoad = typeof gwtOnLoad === 'undefined' ? null : gwtOnLoad;
      JsName gwtOnLoadName = topScope.declareName("gwtOnLoad");
      gwtOnLoadName.setObfuscatable(false);
      JsVar gwtOnLoadNameVar = new JsVar(sourceInfo, gwtOnLoadName);
      gwtOnLoadNameVar.setInitExpr(new JsConditional(sourceInfo, new JsBinaryOperation(sourceInfo,
          JsBinaryOperator.REF_EQ, new JsPrefixOperation(
              sourceInfo, JsUnaryOperator.TYPEOF, gwtOnLoadName.makeRef(sourceInfo)),
          new JsStringLiteral(sourceInfo, "undefined")), JsNullLiteral.INSTANCE,
          gwtOnLoadName.makeRef(sourceInfo)));
      JsVars gwtOnLoadNameVars = new JsVars(sourceInfo);
      gwtOnLoadNameVars.add(gwtOnLoadNameVar);

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      push(op);
    }


    // @Override
    public void endVisit(JPrefixOperation x, Context ctx) {
      JsUnaryOperation op = new JsPrefixOperation(
          JavaToJsOperatorMap.get(x.getOp()), ((JsExpression) pop())); // arg
      push(op);
    }

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