llvm-project/clang/test/SemaCXX/warn-reorder-ctor-initialization.cpp

// RUN: %clang_cc1  -fsyntax-only -Wreorder -verify %s

struct BB {};

struct BB1 {};

class complex : public BB, BB1 { 
public: 
  complex()
    : s2(1), // expected-warning {{field 's2' will be initialized after field 's1'}}
      s1(1),
      s3(3), // expected-warning {{field 's3' will be initialized after base 'BB1'}} 
      BB1(), // expected-warning {{base class 'BB1' will be initialized after base 'BB'}}
      BB()
  {}
  int s1;
  int s2;
  int s3;
}; 


// testing virtual bases.


struct V { 
  V();
};

struct A : public virtual V { 
  A(); 
};

struct B : public virtual V {
  B(); 
};

struct Diamond : public A, public B {
  Diamond() : A(), B() {}
};


struct C : public A, public B, private virtual V { 
  C() { }
};


struct D : public A, public B { 
  D()  : A(), V() {   } // expected-warning {{base class 'A' will be initialized after base 'V'}}
};


struct E : public A, public B, private virtual V { 
  E()  : A(), V() {  } // expected-warning {{base class 'A' will be initialized after base 'V'}}
};


struct A1  { 
  A1(); 
};

struct B1 {
  B1();
};

struct F : public A1, public B1, private virtual V { 
  F()  : A1(), V() {  } // expected-warning {{base class 'A1' will be initialized after base 'V'}}
};

struct X : public virtual A, virtual V, public virtual B {
  X(): A(), V(), B() {} // expected-warning {{base class 'A' will be initialized after base 'V'}}
};

class Anon {
  int c; union {int a,b;}; int d;
  Anon() : c(10), b(1), d(2) {}
};
class Anon2 {
  int c; union {int a,b;}; int d;
  Anon2() : c(2),
            d(10), // expected-warning {{field 'd' will be initialized after field 'b'}}
            b(1) {}
};
class Anon3 {
  union {int a,b;};
  Anon3() : b(1) {}
};

namespace T1 {

struct S1 { };
struct S2: virtual S1 { };
struct S3 { };

struct S4: virtual S3, S2 {
  S4() : S2(), // expected-warning {{base class 'T1::S2' will be initialized after base 'T1::S3'}}
    S3() { };
};
}

namespace test2 {
  struct Foo { Foo(); };
  class A {
    template <class T> A(T *t) :
      y(),  // expected-warning {{field 'y' will be initialized after field 'x'}}
      x()
    {}
    Foo x;
    Foo y;
  };
}

// PR6575: this should not crash
namespace test3 {
  struct MyClass {
    MyClass() : m_int(0) {}
    union {
      struct {
        int m_int;
      };
    };
  };
}

namespace PR7179 {
  struct X
  {
    struct Y
    {
      template <class T> Y(T x) : X(x) { }
    };
  };
}

namespace test3 {
  struct foo {
    struct {
      int a;
      int b;
    };
    foo() : b(), a() { // expected-warning {{field 'b' will be initialized after field 'a'}}
    }
  };
}