Class/struct invariants

[bearophile]

Are D invariants supposed to be so "relaxed"? They don't get called with 
default constructors:


struct Foo {
    int x = 0;
    this(int xx) { this.x = xx; }
    invariant() { assert(x == 1); }
}
struct Bar {
    int x = 0;
    invariant() { assert(x == 1); }
}
class CFoo {
    int x = 0;
    this(int xx) { this.x = xx; }
    invariant() { assert(x == 1); }
}
class CBar {
    int x = 0;
    invariant() { assert(x == 1); }
}
void main() {
    Foo f1;                  // no asserts
    Foo f2 = Foo();          // no asserts
    // Foo f3 = Foo(0);      // asserts, good

    Bar b1;                  // no asserts
    Bar b2 = Bar();          // no asserts
    Bar b3 = Bar(0);         // no asserts

    //assert(b3);            // can't be used
    // b3.__invariant();     // asserts

    //CFoo f3 = new CFoo(0); // asserts, good

    CBar cb2 = new CBar();   // no asserts
    //assert(cb2);           // asserts, good
}


Bye,
bearophile