CODEWITHSUNDEEP
c++c++11lambda
dk123
dk123

Reputation: 19700

C++ lambda argument list

Here is a bit of code that I'm currently using:

int Engine::getEntityCount(const int objectType)
{
    using namespace std;

    int total = 0;
    for_each(p_entities.begin(), p_entities.end(),
    [&objectType,&total](pair<const int, const list<Entity*>> pair)
    {   
        for_each((pair.second).begin(),(pair.second).end(),
        [&objectType,&total](Entity* &entity)
        {
            if ( entity->getAlive() == true && entity->getObjectType() == objectType )
                ++total;
        });
    });
    return total;
}

I'm getting the following error from intel c++:

error : function "lambda [](Entity *&)->void::operator()" cannot be called with the given argument list c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\algorithm

I'm having difficulty understanding what's wrong here. Does anyone have any ideas?

Upvotes: 2

Views: 1468

Answers (2)

zen-cat
zen-cat

Reputation: 425

....
    for_each((pair.second).begin(),(pair.second).end(),
    [&objectType,&total](const Entity* entity)
    {
        ....
    });
});

....

Upvotes: -1

Potatoswatter
Potatoswatter

Reputation: 137850

You're asking for a non-const reference to a pointer to an Entity. The list containing that pointer is const. You must decide between a non-const pointer or a const list.

Upvotes: 2

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