In this specific case making id const or constexpr will fix the problem: constexpr unsigned int id = 100; since there is an exception for the case where you have a constant expression whose result after conversion will fit into the target type. In the more general case you may also use static_cast to cast … Read more
This is checking for overflow. Lets look at auto foo = narrow<int>(std::numeric_limits<unsigned int>::max()) T will be int and U will be unsigned int. So T t = narrow_cast<T>(u); will give store -1 in t. When you cast that back in if (static_cast<U>(t) != u) the -1 will convert back to std::numeric_limits<unsigned int>::max() so the check … Read more
Why the compiler can’t (or won’t) allow those property accesses Consider the following cases mentioned on this github thread linked in the comments by jcalz: interface Vec2 { x: number y: number } interface Vec3 { x: number y: number z: number } const m = { x: 0, y: 0, z: “hello world” }; … Read more
This is ill-formed and there should be diagnostic, however it can either be a warning(which you received) or an error. gcc made this a warning for several versions due to porting issue from C++03: The standard only requires that “a conforming implementation shall issue at least one diagnostic message” so compiling the program with a … Read more