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Document the Language Version 2.0 Triggers #14866

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Document the Language Version 2.0 Triggers #14866

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11 changes: 11 additions & 0 deletions docs/languageversion2.md
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# Language Version 2.0 Triggers
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@anthony-c-martin anthony-c-martin Aug 20, 2024 •
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Should this go in MSDocs instead of on GitHub?


We have recently developed a new Language Version 2.0, which provides a new format for resource definitions when transpiling to an ARM Template.
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We should link to the docs on this: https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/syntax#languageversion-20


However, with this new language version, we noticed that it may cause breaking changes in some use cases.
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As a customer, this sentence wouldn't give me a lot of confidence in our engineering quality bar. "may cause breaking changes" doesn't give me any ability to evaluate risk when deciding to adopt the feature, and sounds like something I'd need to be very concerned about.

Could we make this more precise (e.g. "we are aware of the following behavioral differences", followed by a list with links to issues)?


To avoid triggering Language Version 2.0, we recommend avoiding the following:
* Using user-defined types
* Using user-defined functions
* Using compile-time imports
* Using experimental features
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This feels unnecessarily negative. Could we invert it?

"Using any of following features will automatically enable language version 2.0 code generation:"

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