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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. |
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Cargo.toml |