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@ -41,7 +41,7 @@ var s IntSet
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var _ = s.String() // OK: s is a variable and &s has a String method
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```
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然而,由于只有`*IntSet`类型有String方法,所有也只有`*IntSet`类型实现了fmt.Stringer接口:
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然而,由于只有`*IntSet`类型有String方法,所以也只有`*IntSet`类型实现了fmt.Stringer接口:
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```go
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var _ fmt.Stringer = &s // OK
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