Decorator post validator

[timotheeguerin]

fix #8669

TODO:

• Developper docs
• resolve how to define

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commit: 5cc0ee7

[github-actions]

All changed packages have been documented.

• ✅ @typespec/compiler
• ✅ @typespec/events
• ✅ @typespec/http-client
• ✅ @typespec/http
• ✅ @typespec/json-schema
• ✅ @typespec/openapi
• ✅ @typespec/openapi3
• ✅ @typespec/protobuf
• ✅ @typespec/rest
• ✅ @typespec/spector
• ✅ @typespec/sse
• ✅ @typespec/streams
• ✅ @typespec/tspd
• ✅ @typespec/versioning
• ✅ @typespec/xml

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@typespec/events - internal ✏️

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@typespec/http-client - internal ✏️

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@typespec/http - internal ✏️

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@typespec/json-schema - internal ✏️

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@typespec/openapi - internal ✏️

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@typespec/openapi3 - internal ✏️

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@typespec/protobuf - internal ✏️

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@typespec/rest - internal ✏️

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@typespec/spector - internal ✏️

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@typespec/sse - internal ✏️

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@typespec/streams - internal ✏️

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@typespec/tspd - internal ✏️

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@typespec/versioning - internal ✏️

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@typespec/xml - internal ✏️

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@typespec/compiler - feature ✏️

[API] Introduction of decorator validator callbacks. A decorator can define some callbacks to achieve some deferred validation (After the type is finished or the whole graph is)

[timotheeguerin]

right now have this expecting an array of diagnostic, this feels nicer that always expecting it to be reported to the program but also less consistent with the rest. It also doesn't pervent you from directly reporting to program if you prefer. What do people think?

[azure-sdk]

You can try these changes here

🛝 Playground	🌐 Website	🛝 VSCode Extension

[witemple-msft]

I think we ought to have a strong warning in here about not mutating the type graph during validation.