PoC: Add syntax for escaped field selectors. #1002
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Introduces syntax for escaped fields that are not normally syntactically legal field selections with backticks. This PR is limited to fields, but would also consider adding for namespaced names (e.g. `in.example.Foo`)
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I like this as a first approach at relaxing the syntax to support escapes need for fields named after reserved words and for supporting proto extension fields natively.
The type-checker should continue to validate field names which is great, and there's no weirdness with invalid function names, just escaping on the namespaces. It seems to help satisfy a common pain point. It might not solve top-level .in domains within namespace names, but it's a great start.
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Introduces syntax for escaped fields that are not normally syntactically legal field selections with backticks.
This PR is limited to fields, but would also consider adding for namespaced names (e.g.
in.example.Foo)DO NOT MERGE