void construct_float3_from_float_float()             { float3 x = float3(1.0, 2.0); }
void construct_float3_from_float_float_float_float() { float3 x = float3(1.0, 2.0, 3.0, 4.0); }
void construct_bool_from_int3()                      { bool   x = bool(int3(77)); }