Simplify member indexing #510
Merged
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This updates schemas to use the natural ordering of a dict to set member index. Recursive shapes are accommodated by using a None value to reserve the member's spot in the dictionary until the value can be actually set.
This has two primary effects. Firstly, it allows the member index to be confidently used at runtime to actually retrieve a member. This isn't needed in most cases, but can come in handy occasionally.
This also cuts out a huge amount of boilerplate in the generated code.
In the PR I've also included a commit that uses this natural order when constructing http bindings as well as one to ignore magic trailing commas during formatting.
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