{
  "expression": ["to-number", ["get", "x"]],
  "inputs": [
    [{}, {"properties": {"x": 1}}],
    [{}, {"properties": {"x": "1"}}],
    [{}, {"properties": {"x": "6.02e-23"}}],
    [{}, {"properties": {"x": "Not a number"}}],
    [{}, {"properties": {"x": null}}],
    [{}, {"properties": {"x": [1, 2]}}],
    [{}, {"properties": {"x": {"y": 1}}}]
  ],
  "expected": {
    "compiled": {
      "result": "success",
      "isFeatureConstant": false,
      "isZoomConstant": true,
      "type": "number"
    },
    "outputs": [
      1,
      1,
      6.02e-23,
      {"error": "Could not convert \"Not a number\" to number."},
      0,
      {"error": "Could not convert [1,2] to number."},
      {"error": "Could not convert {\"y\":1} to number."}
    ],
    "serialized": ["to-number", ["get", "x"]]
  }
}