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Allow automatically derived Show for enums to be just the field name #18669

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mitsuhiko opened this issue Nov 5, 2014 · 1 comment
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Allow automatically derived Show for enums to be just the field name #18669

mitsuhiko opened this issue Nov 5, 2014 · 1 comment

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@mitsuhiko
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When working with enums for error reporting it would be super useful if the default implementation of Show for enums could be customized so that you can skip the contained data. For instance if you have a MyError(SomeOtherError) it is interesting to just get MyError instead of MyError(SomeOtherError { foo: 42 }) or whatever is contained in there.
@steveklabnik
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I believe the Display/Debug split takes care of this now, as Display no longer has a default implementation for exactly this reason.

lnicola pushed a commit to lnicola/rust that referenced this issue Dec 16, 2024
@Veykril
Merge pull request rust-lang#18669 from Veykril/push-qqkuxtvsmsut
508ce7c 
internal: Only parse the object file once in proc-macro-srv
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@mitsuhiko @steveklabnik