bounds-checker | 易学教程

How to make std::vector's operator[] compile doing bounds checking in DEBUG but not in RELEASE

阅读更多关于 How to make std::vector's operator[] compile doing bounds checking in DEBUG but not in RELEASE

问题 I'm using Visual Studio 2008. I'm aware that std::vector has bounds checking with the at() function and has undefined behaviour if you try to access something using the operator [] incorrectly (out of range). I'm curious if it's possible to compile my program with the bounds checking. This way the operator[] would use the at() function and throw a std::out_of_range whenever something is out of bounds. The release mode would be compiled without bounds checking for operator[], so the

GCC STL bound checking

阅读更多关于 GCC STL bound checking

问题 How do I enable bound checking for operator[] and iterators? 回答1: You can activate runtime iterator and bounds checking by compiling with -D_GLIBCXX_DEBUG . Also note that random-access containers provide the always bounds-checking at() -operation in addition to operator [] . References: GCC STL debug mode: http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode_using.html#debug_mode.using.mode at() operation: std::vector::at(), std::deque::at() and std::array::at() 回答2: you should overload

@inbounds propagation rules in Julia

阅读更多关于 @inbounds propagation rules in Julia

问题 I'm looking for some clarification of the bounds checking rules in Julia. Is this meaning that if I put @inbounds at the beginning of the for loop, @inbounds for ... end then only for "one layer" inbounds propagates, so if there is a for loop inside of that, @inbounds will not turn off the bounds checking in there? And if I use @propagate_inbounds , it will go inside the nested for loop? And is it correct to say @inbounds always wins over @boundscheck ? The only exception if the function is

How do virtual destructors work?

阅读更多关于 How do virtual destructors work?

问题 Few hours back I was fiddling with a Memory Leak issue and it turned out that I really got some basic stuff about virtual destructors wrong! Let me put explain my class design. class Base { virtual push_elements() {} }; class Derived:public Base { vector<int> x; public: void push_elements(){ for(int i=0;i <5;i++) x.push_back(i); } }; void main() { Base* b = new Derived(); b->push_elements(); delete b; } The bounds checker tool reported a memory leak in the derived class vector. And I figured

How do virtual destructors work?

阅读更多关于 How do virtual destructors work?

Few hours back I was fiddling with a Memory Leak issue and it turned out that I really got some basic stuff about virtual destructors wrong! Let me put explain my class design. class Base { virtual push_elements() {} }; class Derived:public Base { vector<int> x; public: void push_elements(){ for(int i=0;i <5;i++) x.push_back(i); } }; void main() { Base* b = new Derived(); b->push_elements(); delete b; } The bounds checker tool reported a memory leak in the derived class vector. And I figured out that the destructor is not virtual and the derived class destructor is not called. And it

How to make std::vector's operator[] compile doing bounds checking in DEBUG but not in RELEASE

阅读更多关于 How to make std::vector's operator[] compile doing bounds checking in DEBUG but not in RELEASE

I'm using Visual Studio 2008. I'm aware that std::vector has bounds checking with the at() function and has undefined behaviour if you try to access something using the operator [] incorrectly (out of range). I'm curious if it's possible to compile my program with the bounds checking. This way the operator[] would use the at() function and throw a std::out_of_range whenever something is out of bounds. The release mode would be compiled without bounds checking for operator[], so the performance doesn't degrade. I came into thinking about this because I'm migrating an app that was written using

GCC STL bound checking

阅读更多关于 GCC STL bound checking

How do I enable bound checking for operator[] and iterators? Peter G. You can activate runtime iterator and bounds checking by compiling with -D_GLIBCXX_DEBUG . Also note that random-access containers provide the always bounds-checking at() -operation in addition to operator [] . References: GCC STL debug mode: http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode_using.html#debug_mode.using.mode at() operation: std::vector::at() , std::deque::at() and std::array::at() you should overload the operator[] for your specific classes. If you want to use an existing STL container, the at()