Add support for string config fields - #5
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- Add FieldType::String and ConfigValueMut::String, backed by a StringView so any String<N> can be used - Put both after U8 so the existing type ids stay the same - Take the max length from the config struct; too long gives DataTooLong - Check the length before clear() so a rejected value keeps the old one - Reject control characters, line and paragraph separators, and bidirectional embeddings, overrides and isolates with InvalidValue, since the value is printed by host tools; the directional marks are still allowed - Enable the serde feature of heapless, needed for StringView's Serialize impl
robin-nitrokey
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Looks good. Just one question regarding the forbidden characters:
ABuljko
marked this pull request as ready for review
August 11, 2026 17:11
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FieldType::StringandConfigValueMut::String(&mut StringView)U8, soBool=0andU8=1stay the sameFieldType::Stringa unit variant: the max length comes from the config struct, and values that are too long giveDataTooLongStringView, so anyString<N>works: hold aString<32>and passas_mut_view()InvalidValue; the directional marks are still allowedclear(), so a rejected value keeps the old oneserdefeature ofheapless, needed forStringView'sSerializeimpl