[
  {
    "id": "$literal baseline",
    "operator": "$literal",
    "kind": "baseline",
    "operand": "all",
    "expression": {
      "$literal": {
        "x": "$field"
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"x\": \"$field\"}}",
      "present": true
    }
  },
  {
    "id": "$literal input: null",
    "operator": "$literal",
    "kind": "null",
    "operand": "input",
    "expression": {
      "$literal": null
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": null}",
      "present": true
    }
  },
  {
    "id": "$literal input: zero",
    "operator": "$literal",
    "kind": "zero",
    "operand": "input",
    "expression": {
      "$literal": 0
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"$numberInt\": \"0\"}}",
      "present": true
    }
  },
  {
    "id": "$literal input: negative",
    "operator": "$literal",
    "kind": "negative",
    "operand": "input",
    "expression": {
      "$literal": -2
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"$numberInt\": \"-2\"}}",
      "present": true
    }
  },
  {
    "id": "$literal input: decimal",
    "operator": "$literal",
    "kind": "decimal",
    "operand": "input",
    "expression": {
      "$literal": 2.5
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"$numberDouble\": \"2.5\"}}",
      "present": true
    }
  },
  {
    "id": "$literal input: numeric string",
    "operator": "$literal",
    "kind": "numeric string",
    "operand": "input",
    "expression": {
      "$literal": "12"
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": \"12\"}",
      "present": true
    }
  },
  {
    "id": "$literal input: text",
    "operator": "$literal",
    "kind": "text",
    "operand": "input",
    "expression": {
      "$literal": "hello"
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": \"hello\"}",
      "present": true
    }
  },
  {
    "id": "$literal input: empty string",
    "operator": "$literal",
    "kind": "empty string",
    "operand": "input",
    "expression": {
      "$literal": ""
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": \"\"}",
      "present": true
    }
  },
  {
    "id": "$literal input: boolean",
    "operator": "$literal",
    "kind": "boolean",
    "operand": "input",
    "expression": {
      "$literal": true
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": true}",
      "present": true
    }
  },
  {
    "id": "$literal input: false",
    "operator": "$literal",
    "kind": "false",
    "operand": "input",
    "expression": {
      "$literal": false
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": false}",
      "present": true
    }
  },
  {
    "id": "$literal input: typed date",
    "operator": "$literal",
    "kind": "typed date",
    "operand": "input",
    "expression": {
      "$literal": {
        "$date": "2026-01-15T15:00:00Z"
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"$date\": {\"$numberLong\": \"1768489200000\"}}}",
      "present": true
    }
  },
  {
    "id": "$literal input: decimal128",
    "operator": "$literal",
    "kind": "decimal128",
    "operand": "input",
    "expression": {
      "$literal": {
        "$numberDecimal": "1.25"
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"$numberDecimal\": \"1.25\"}}",
      "present": true
    }
  },
  {
    "id": "$literal input: empty array",
    "operator": "$literal",
    "kind": "empty array",
    "operand": "input",
    "expression": {
      "$literal": []
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": []}",
      "present": true
    }
  },
  {
    "id": "$literal input: numeric array",
    "operator": "$literal",
    "kind": "numeric array",
    "operand": "input",
    "expression": {
      "$literal": [
        1,
        2,
        3
      ]
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": [{\"$numberInt\": \"1\"}, {\"$numberInt\": \"2\"}, {\"$numberInt\": \"3\"}]}",
      "present": true
    }
  },
  {
    "id": "$literal input: mixed array",
    "operator": "$literal",
    "kind": "mixed array",
    "operand": "input",
    "expression": {
      "$literal": [
        1,
        null,
        "x",
        3
      ]
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": [{\"$numberInt\": \"1\"}, null, \"x\", {\"$numberInt\": \"3\"}]}",
      "present": true
    }
  },
  {
    "id": "$literal input: nested array",
    "operator": "$literal",
    "kind": "nested array",
    "operand": "input",
    "expression": {
      "$literal": [
        [
          1,
          2
        ],
        [
          3
        ]
      ]
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": [[{\"$numberInt\": \"1\"}, {\"$numberInt\": \"2\"}], [{\"$numberInt\": \"3\"}]]}",
      "present": true
    }
  },
  {
    "id": "$literal input: empty object",
    "operator": "$literal",
    "kind": "empty object",
    "operand": "input",
    "expression": {
      "$literal": {}
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {}}",
      "present": true
    }
  },
  {
    "id": "$literal input: object",
    "operator": "$literal",
    "kind": "object",
    "operand": "input",
    "expression": {
      "$literal": {
        "x": 1
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"x\": {\"$numberInt\": \"1\"}}}",
      "present": true
    }
  },
  {
    "id": "$literal input: ISO date string",
    "operator": "$literal",
    "kind": "ISO date string",
    "operand": "input",
    "expression": {
      "$literal": "2026-01-15T15:00:00Z"
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": \"2026-01-15T15:00:00Z\"}",
      "present": true
    }
  },
  {
    "id": "$literal empty arguments",
    "operator": "$literal",
    "kind": "empty arguments",
    "operand": "all",
    "expression": {
      "$literal": []
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": []}",
      "present": true
    }
  },
  {
    "id": "$literal unknown option",
    "operator": "$literal",
    "kind": "unknown option",
    "operand": "all",
    "expression": {
      "$literal": {
        "unexpected": 1
      }
    },
    "input": {},
    "srotax": {
      "bson": "{\"v\": {\"unexpected\": {\"$numberInt\": \"1\"}}}",
      "present": true
    }
  }
]