go type_error ai_generated true

cannot compare x (variable of type struct { ... }) with y (variable of type struct { ... })

ID: go/struct-comparison-not-allowed

Also available as: JSON · Markdown · 中文

88%Fix Rate

87%Confidence

1Evidence

2023-04-10First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
Go 1.20	active	—	—	—
Go 1.21	active	—	—	—
Go 1.22	active	—	—	—

Structs containing fields that are not comparable (e.g., slices, maps, functions) cannot be directly compared with == or !=.

generic

包含不可比较字段（如切片、映射、函数）的结构体不能直接使用 == 或 != 进行比较。

85% success Use reflect.DeepEqual() for deep comparison: if reflect.DeepEqual(a, b) { ... }
```
Use reflect.DeepEqual() for deep comparison: if reflect.DeepEqual(a, b) { ... }
```
80% success Implement a custom comparison function that manually compares each comparable field and uses reflect.DeepEqual for incomparable ones.
```
Implement a custom comparison function that manually compares each comparable field and uses reflect.DeepEqual for incomparable ones.
```
75% success Redesign the struct to avoid incomparable fields (e.g., replace slices with arrays of fixed size).
```
Redesign the struct to avoid incomparable fields (e.g., replace slices with arrays of fixed size).
```

Use reflect.DeepEqual() for deep comparison: if reflect.DeepEqual(a, b) { ... }

Implement a custom comparison function that manually compares each comparable field and uses reflect.DeepEqual for incomparable ones.

Redesign the struct to avoid incomparable fields (e.g., replace slices with arrays of fixed size).

Common approaches that don't work:

90% fail
Go does not support operator overloading; you cannot define a custom == method.
40% fail
reflect.DeepEqual works but may have performance overhead and does not handle unexported fields in some cases.
70% fail
Interface comparison still requires underlying values to be comparable; same error will occur.