Commits on Mar 4, 2022

1. Implement Copy, Clone, PartialEq and Eq for core::fmt::Alignment …

   Alignment is a fieldless exhaustive enum, so it is already possible to
   clone and compare it by matching, but it is inconvenient to do so. For
   example, if one would like to create a struct describing a formatter
   configuration and provide a clone implementation:
   
   ```rust
   pub struct Format {
       fill: char,
       width: Option<usize>,
       align: fmt::Alignment,
   }
   
   impl Clone for Format {
       fn clone(&self) -> Self {
           Format {
               align: match self.align {
                   fmt::Alignment::Left => fmt::Alignment::Left,
                   fmt::Alignment::Right => fmt::Alignment::Right,
                   fmt::Alignment::Center => fmt::Alignment::Center,
               },
               .. *self
           }
       }
   }
   ```
   
   Derive Copy, Clone, PartialEq, and Eq for Alignment for convenience.

   

   tmiasko committed Mar 4, 2022
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