Typer error for code generation for if statement

[Cable Maharaj]

Below i have the blocks generating the following js code:

I want to be able to put the function in the if statement, like so:

```

if (checkdistance() == 0) {

}

```

But i get this error:


Im not sure how to solve this, my code for the block 'ultra' as follows:

block:

Blockly.Blocks['ultra'] = {
  init: function() {
    this.appendDummyInput()
        .appendField("read distance");
    this.setInputsInline(true);
    this.setOutput(true, null);
    this.setColour(sensor_color);
 this.setTooltip("");
 this.setHelpUrl("");
  }
};

generator:

Blockly.JavaScript.ultra = function () {
  return "checkdistance()"
}

Any Advice would be appreciated.

[Neil Fraser]

You want:

Blockly.JavaScript.ultra = function () {

  return ["checkdistance()", JavaScript.ORDER_FUNCTION_CALL]]

}

Statement blocks (with top/bottom connectors) can just return code, but value blocks (with output connectors) need to return both code and a precedence constant so that parentheses may be added correctly.  For more information:

https://developers.google.com/blockly/guides/create-custom-blocks/generating-code

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Neil Fraser, Switzerland
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[Cable Maharaj]

Thats perfect! thanks!