{
  "id": "go/struct-comparing-with-unsupported-field",
  "signature": "cannot compare struct containing a slice",
  "signature_zh": "无法比较包含切片的结构体",
  "regex": "cannot compare struct containing a slice",
  "domain": "go",
  "category": "type_error",
  "subcategory": null,
  "root_cause": "Go does not support direct equality comparison (==) for structs that contain slice, map, or function fields because these types are not comparable.",
  "root_cause_type": "generic",
  "root_cause_zh": "Go 不支持对包含切片、映射或函数字段的结构体进行直接相等比较（==），因为这些类型是不可比较的。",
  "versions": [
    {
      "version": "go1.20",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "go1.21",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "go1.22",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Using reflect.DeepEqual for the comparison but ignoring performance",
      "why_fails": "DeepEqual works but is slow and may panic on unexported fields; it also doesn't solve the compile-time error.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "Converting the slice to a string and comparing strings",
      "why_fails": "Workable for simple cases but brittle; slice order and content must match exactly, and it's not idiomatic.",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "Removing the slice field from the struct temporarily",
      "why_fails": "Changes the data model and may break other logic that depends on the slice.",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Implement a custom Equal method that compares each field, including slices using reflect.DeepEqual or a loop",
      "success_rate": 0.92,
      "how": "Implement a custom Equal method that compares each field, including slices using reflect.DeepEqual or a loop",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use a pointer to the struct and compare pointers, or use a map key that doesn't include the slice",
      "success_rate": 0.8,
      "how": "Use a pointer to the struct and compare pointers, or use a map key that doesn't include the slice",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "Implement a custom Equal method that compares each field, including slices using reflect.DeepEqual or a loop",
    "Use a pointer to the struct and compare pointers, or use a map key that doesn't include the slice"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://go.dev/ref/spec#Comparison_operators",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.86,
  "fix_success_rate": 0.84,
  "resolvable": "true",
  "first_seen": "2023-11-05",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}