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Ch2 Listing 3.15: match self would be more easily understood #63

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ChenZhongPu opened this issue Dec 3, 2021 · 0 comments
Open

Ch2 Listing 3.15: match self would be more easily understood #63

ChenZhongPu opened this issue Dec 3, 2021 · 0 comments

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@ChenZhongPu
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In Listing 3.15,

   fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
     match *self {
         FileState::Open => write!(f, "OPEN"),      // <4>
         FileState::Closed => write!(f, "CLOSED"),  // <4>
     }

In fact, a & is not necessary, and using match self directly would be more easily understood.

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