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Richard Smith
6dda094928
Change parse tree from `template (T:! type)` to `(template T):! type`, so that we have information about whether a binding is a template binding available when forming the representation of the binding pattern. This incidentally fixes a bug that we would accept `template addr A:! B` instead of the intended `addr template A:! B`. Track whether a symbolic binding is a template binding on the `EntityName` object. I'm borrowing a bit from the `CompileTimeBindIndex` for this in order to avoid making `EntityName`s larger. Longer-term, we should think about using a different representation for symbolic bindings, to avoid including these fields in all `EntityName`s, but that's out of scope for this change. So far, template bindings are treated as having the same phase as checked bindings, but that will change in a future PR.