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C++ generic iterator


C++ generic iterator

By : user2955034
Date : November 22 2020, 10:33 AM
like below fixes the issue You can simply use traits to remove the T type completely, allowing it to be determined automatically:
code :
template <typename Iterator>
std::vector<typename std::iterator_traits<Iterator>::value_type>
    dumb_copy(Iterator first, Iterator last)
{
    std::vector<typename std::iterator_traits<Iterator>::value_type> copy;

    // Populate the copy vector

    return copy;
}


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Generic iterator

Generic iterator


By : scott.sizemore
Date : March 29 2020, 07:55 AM
I hope this helps you . Here are some articles you might find of interest
Giving STL Iterators a Base Class
getting an iterator to a generic container inside a generic class: HOW TO

getting an iterator to a generic container inside a generic class: HOW TO


By : user3896774
Date : March 29 2020, 07:55 AM
help you fix your problem This comes from a larger context, however I have stripped alot of code to simplify the question. If you feel I have left anything out please let me know. , Use typename:
code :
typename container::iterator cbi;
typedef typename std::map<key, container>::const_iterator mapItr;
typename container::const_iterator cbi; //use this instead!
typename container::const_iterator cbi = mbi->second.begin();
typename container::const_iterator ebi = mbi->second.end();
std::copy(cbi, mbi, std::ostream_iterator<container_type>(out, "\t\n"));
            // ^^^ typo
Generic iterator in c++

Generic iterator in c++


By : clee504
Date : March 29 2020, 07:55 AM
this will help Probably a class that has operators unary *, ++ and possibly -- defined, where the first one returns a reference to the underlying T object, the second advances the iterator to the next element in the container and the last one advances the iterator backwards.
Or, if you're using some standard container, just the return value of yourContainer.begin() or yourContainer.find().
Generic Iterator on Entry Set

Generic Iterator on Entry Set


By : yuliang liu
Date : March 29 2020, 07:55 AM
wish helps you , Try
code :
Iterator<? extends Entry<?, V>> it = map.entrySet().iterator();
List<Entry<Integer, String>> entries = new ArrayList<>();

//this is a compile error, but assume it is possible
List<Entry<?, String>> wildcardEntries = entries; 

//then since this is already possible
wilcardEntries.add(new Entry<String, String>("a", "b"));
Entry<Integer, String> entry1 = entries.get(0);

//this would result in a type error (ClassCastException)
Integer i = entry1.getKey();
for ( Entry<?, V> entry : map.entrySet() ) {
   //...
}
Iterator<Long> :The type HTMLDocument.Iterator is not generic; it cannot be parameterized with arguments <Long&

Iterator<Long> :The type HTMLDocument.Iterator is not generic; it cannot be parameterized with arguments <Long&


By : kay bee
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , The answer is in the question. You're using the type HTMLDocument.Iterator, instead of using java.util.Iterator.
Fix your imports.
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