Checking if an iterator is valid

by

I assume you mean “is an iterator valid,” that it hasn’t been invalidated due to changes to the container (e.g., inserting/erasing to/from a vector). In that case, no, you cannot determine if an iterator is (safely) dereferencable.

More Related Contents:

  1. Why use iterators instead of array indices?
  2. Why are Standard iterator ranges [begin, end) instead of [begin, end]?
  3. What happens if you call erase() on a map element while iterating from begin to end?
  4. Removing item from vector while iterating?
  5. comparing iterators from different containers
  6. Why use non-member begin and end functions in C++11?
  7. Sorting a vector in descending order
  8. How are iterators and pointers related?
  9. What’s faster, iterating an STL vector with vector::iterator or with at()?
  10. What is the difference between const_iterator and non-const iterator in the C++ STL?
  11. What is an iterator’s default value?
  12. Custom Iterator in C++
  13. Why is “!=” used with iterators instead of “
  14. how portable is end iterator decrement?
  15. Can std::begin work with array parameters and if so, how?
  16. std::vector iterator invalidation
  17. How does std::copy work with stream iterators
  18. Why does a push_back on an std::list change a reverse iterator initialized with rbegin?
  19. Can raw pointers be used instead of iterators with STL algorithms for containers with linear storage?
  20. How to remove constness of const_iterator?
  21. What happens if you increment an iterator that is equal to the end iterator of an STL container
  22. Are const_iterators faster?
  23. How to check that the passed Iterator is a random access iterator?
  24. Do STL iterators guarantee validity after collection was changed?
  25. Incrementing iterators: Is ++it more efficient than it++? [duplicate]
  26. what is the difference between const_iterator and iterator? [duplicate]
  27. How to increment an iterator by 2?
  28. Types of iterator : Output vs. Input vs. Forward vs. Random Access Iterator
  29. iterator for 2d vector
  30. How can I copy one map into another using std::copy?

Leave a Comment