| c++ Programming Glossary: cached_areaDoes const mean thread-safe in C++11? http://stackoverflow.com/questions/14127379/does-const-mean-thread-safe-in-c11  in the future class rect int width 0 height 0 mutable int cached_area 0 mutable bool cached_area_valid true public ... void set_size.. width 0 height 0 mutable int cached_area 0 mutable bool cached_area_valid true public ... void set_size int new_width int new_height.. true public ... void set_size int new_width int new_height cached_area_valid width new_width height new_height width new_width height.. 
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