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307cd88354
I was refactoring something else but ran into this function. It was somewhat confusing to read through and understand, but it boils down to two steps: - First we try `OptionArgParser::ToBoolean`. If that works, then we're good to go. - Second, we try `llvm::to_integer` to see if it's an integer. If it parses to 0 or 1, we're good. - Failing either of the steps above means we cannot parse it into a bool. Instead of having an integer out param and a bool return value, the interface is better served with an optional<bool> -- Either it parses into true or false, or you get back nothing (nullopt).