Add error recovery for AST analysis#217
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gerau wants to merge 2 commits intoBlockstreamResearch:masterfrom
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Add error recovery for AST analysis#217gerau wants to merge 2 commits intoBlockstreamResearch:masterfrom
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This adds error states for `parse::Expression`, `ast::Expression` `ResolvedType` and `AliasedType`. Error recovery introduced by `chumsky` parser require some default states to recover to, which was represented before with dummy values, like unit type for expression or alias with `error` name. However, this kind of recovery is not desirable in case of further analyzing of parse tree, because it would lead to unrecognazible errors on analyzer.
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Add error reporting and remade `Program::analyze` function, so it would return `Option` like it is done right now with parsing. All errors should be return from `Result` or be reported to the scope.
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