Louis Gesbert 4ae392c900 AST refactoring ... Many changes got bundled in here and would be too tedious to separate. Closes #330 See changes in `shared_ast/definitions.ml` to check the main point. - the biggest change is a modification of the struct and enum types in expressions: they are now stored as `Map`s throughout passes, and no longer converted to indexed lists after scopelang. Their accessors are also changed, and tuples only exist in Lcalc (they're used for closure conversion). This implied adding some more information in the contexts, to keep the mapping between struct fields and scope output variables. It should also be much more robust (no longer relying on assumptions upon different orderings). - another very pervasive change is more cosmetic: the rewrite of the main AST to use inline records, labelling individual subfields. - moved the checks for correct definitions and accesses of structures from `Scope_to_dcalc` to `Typing` - defining some new shallow iterators in module `Shared_ast.Expr`, and factorising a few same-pass rewriting functions accordingly (closure conversion, optimisations, etc.) - some smaller style improvements (ensuring we use the proper compare/equal functions instead of `=` in a few `when` closes, for example)		2022-11-17 18:16:09 +01:00
..
bad	Some fancy unicode for error outlines	2022-11-07 14:13:01 +01:00
good	AST refactoring	2022-11-17 18:16:09 +01:00