feat(library/init/meta/format): has_to_format α implies has_to_string α#231
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feat(library/init/meta/format): has_to_format α implies has_to_string α#231
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This commit adds a low-priority meta instance which concludes `has_to_string α` from `has_to_format α`. The instance has to be meta since `format` is meta. This means that for most types, it is still preferable to give a non-meta `has_to_string` instance manually.
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I'm not actually sure that this is a good idea, because of the meta issue. For meta types like |
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This commit adds a low-priority meta instance which concludes
has_to_string αfromhas_to_format α. The instance has to be metasince
formatis meta. This means that for most types, it is stillpreferable to give a non-meta
has_to_stringinstance manually.