Update JsonNew for IReference+cleaner optionals, and better Mappers #6890
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This commit updates JsonUtilsNew to support winrt Windows::Foundation::IReference<T> as an option type, and cleans up the optional support code by removing the optional overload on GetValue(...). Instead of using an overload with a partial specialization, we're using a constexpr if with a type trait to determine option-type-ness. In addition, Carlos reported an issue with deriving from FlagMapper (itself templated) and referring to the base type's members without fully qualifying them. To make derivation easier, `EnumMapper` and `FlagMapper` now provide `BaseEnumMapper` and `BaseFlagMapper` type aliases. Lastly, in casual use, I found out that I'd written the til::color convreter wrong: it supports color strings of length 7 (#rrggbb) and length 4 (#rgb). I mistyped (and failed to test) support for 4-length color strings by pretending they were only 3 characters long.
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This commit updates JsonUtilsNew to support winrt
Windows::Foundation::IReference<T>as an option type, and cleans up theoptional support code by removing the optional overload on
GetValue(...). Instead of using an overload with a partialspecialization, we're using a constexpr if with a type trait to
determine option-type-ness.
In addition, Carlos reported an issue with deriving from
FlagMapper(itself templated) and referring to the base type's members without
fully qualifying them. To make derivation easier,
EnumMapperandFlagMappernow provideBaseEnumMapperandBaseFlagMappertypealiases.
I've taken the opportunity to add a
winrt::hstringconversiontrait.
Lastly, in casual use, I found out that I'd written the til::color
converter wrong: it supports color strings of length 7 (
#rrggbb) andlength 4 (
#rgb). I mistyped (and failed to test) support for 4-lengthcolor strings by pretending they were only 3 characters long.
References
Merged JsonUtils changes from #6004 and #6590.
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