Go Language Structure equality

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The equality of the go language structure is judged by the equality of the members of the struct body.

I was wondering errors before. The struct returned by new is not equal, and the Read function returns IO.EOF, and many example code compares the error value returned by the read return to Io.eof, and the original io.eof is a pointer to the wrong object, not the wrong object itself. An object is instantiated more, their object pointers must be different, so that the read function return value and io.eof comparison, because the comparison is the object pointer value, is a pure number comparison, which distinguishes the object of different instances.