IssueTracker

https://en.cppreference.com/w/cpp/language/implicit_conversion lists scenarios where expressions can be implicitly cast. Also note the "Contextual conversions".

Concretely, Reactor currently doesn't support statements like If(i) {} where i is an Int. This and other common cases in C++ should be made valid. Note we should be careful not to allow ambiguous conversions. This specific case should probably be handled using a cast in the If macro, rather than a Bool(Int) constructor or Int::operator Bool().