Limits

[dzmitry-lahoda]

Allow to limit string to 50 chars and ushort to 14 bits. I want to use this in games.

[andrewlock]

I'm not entirely sure if that's possible in this library. We could not scaffold the constructor, which would allow you to create your own, but if I remember correctly you can't enforce that a non-default constructor is called in structs. A better option is probably to use a factory function to guard creation, and create your own JSON converters to check for constraints I guess

[dzmitry-lahoda]

• there is popular non default ctro proposal for C# lang for structs, even if done it probably will be unsound warning, but still. so having ctor generated at least some kind of indicator.
• next step would be to write roslyn analyser to detect possible violations
• also cast operator could be generated. cast from value.
• Validate and Create method also could be generated
• could also allow to setup default value into this
• exception thrower patter to be used for speed instead of throw new (see list index impl)
• could add approciate data annotation either
• all of that could be done before enabling json stuff
• and it would eliminate much of code (dozens lines)

[dzmitry-lahoda]

another example - id of guest account is 0. non guest is > 0. I want id which is 1+.

[andrewlock]

I understand the desire, it just does not seem feasible currently with structs. Plus I see this library become pretty much obsolete with C#9

The only option I see in the short term is to support class as well as struct, and allow making the constructor private, so that you can write your own public constructor (while still allowing to create from JSON, if they type convert options are enabled)

[dzmitry-lahoda]

pretty much obsolete with C#9 with public data class Person? it is class (GC) with no automatic operators to cast to and from to internal state (for id it is single value). Also StronglyTypedId may generate records in future.

[SteveDunn]

Hi @dzmitry-lahoda - I have something similar to @andrewlock 's library, called Vogen. It's similar, but different insofar as it's more focused on 'Value Objects', in particular validation. It has analyzers that break the build if certain situations arise where validation could be bypassed

https://github.com/SteveDunn/Vogen