ct.cpp

/*
This gist demonstrates an issue with Clang-Tidy, I think. 

Basically, you shouldn't be required to initialize all members of a
union, for obvious reasons, but Clang-Tidy doesn't care that the
"missing" members are part of a union, and tries to get them to be
initialized anyway.
*/

struct Type {
    union {
        int _a;
        float _b;
    };
    double _c;
    
    // Warning here that _b isn't initialized
    Type(int a, double c) : _a(a), _c(c) {}
    // Warning here that _a isn't initialized
    Type(float b, double c) : _b(b), _c(c) {}
};