I have some predefined type which inherits boost::noncopyable (so I have to store the pointer at these objects). I use a boost::ptr_map. As I know, the second argument in it is already a pointer. So, the code:
ptr_map<string, boost::any> SomeMap;
typedef %Some noncopyable class/signature% NewType;
// Inserting now
boost::any *temp = new boost::any(new KeyEvent());
SomeMap.insert("SomeKey", temp);
The error is:
error: no matching function for call to ‘boost::开发者_如何学Cptr_map<std::basic_string<char>, boost::any>::insert(const char [11], boost::any*&)’
UPD: When I don't pass the pointer to the any any temp = any(new KeyEvent());
I get:
error: no matching function for call to ‘boost::ptr_map<std::basic_string<char>, boost::any>::insert(const char [11], boost::any&)’
This version of insert
takes the key by non-const reference, which means you can't use a temporary as the first value. This is to prevent memory leaks; in your code, temp
would leak if the string constructor were to throw.
You must either create the key object before creating the raw pointer:
string key("SomeKey");
any* temp = new whatever;
SomeMap.insert(key, temp);
or use an auto_ptr
to ensure that the object is deleted whatever happens:
auto_ptr<any> temp(new whatever);
SomeMap.insert("SomeKey", temp);
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