c++ - Set struct elements to values within definition -

the compiler seems have no problem this. can safely assume object create of type have these defaults values?

struct colorproperties {    bool colorred    = true;    bool colorblue   = false;    bool isrectangle = true; };  colorproperties myproperties; 

will myproperties automatically contain element values noted struct?

yes, can. it's c++11 feature. it's equal to

struct colorproperties {    colorproperties()       : colorred(true), colorblue(false), isrectangle(true)    {}     // }; 

you can read proposal here

quotes standard.

n3376 12.6.2/8

in non-delegating constructor, if given non-static data member or base class not designated mem-initializer-id (including case there no mem-initializer-list because constructor has no ctor-initializer) , entity not virtual base class of abstract class (10.4), then

— if entity non-static data member has brace-or-equal-initializer, entity initialized specified in 8.5;

struct {    a(); };  struct b {    b(int); };  struct c {    c() { }     a;    const b b; // error: b has no default constructor    int i;     // ok: has indeterminate value    int j = 5; // ok: j has value 5 };