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Closed 9 years ago.
Ogre::any_cast<std::map<Rail>::iterator>
It takes Ogre::any_cast<std::map<Rail> and says too few arguments etc. How can I fix it (other than obvious typedef aliasing)?
The problem is that std::map takes at least two template arguments - the key type and the value type. Currently you have std::map<Rail>. What are you mapping from Rail to? For example, this would be okay if your iterators are for a std::map that maps from Rail to int (assuming Rail is not a deduced type):
Ogre::any_cast<std::map<Rail,int>::iterator>(some_any_object)
Related
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Closed 9 years ago.
I am inserting 'this' pointer into a map
Does it cause a segmentation fault
My code is
client->commandHandlerMap.insert(std::pair<CommandType , CommandHandler*>(CommandType::OrderBookCommandType , this));
I am doing this inside the member function of a derived class of CommandHandler
I would assume that client is not initialized or has an invalid pointer.
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Closed 9 years ago.
I have the following class:
class clsTree;
{
private:
vector<clsNode*>m_content;
m_RootNode *clsNode;
m_LastNode *clsNode;
public:
vector<clsNode*>Content;
wstring interpret(wstring uWord);
};
The compiler does not like my member declaration of clsNode at all.
The first error I get is "Member clsTree::clsNode is not a type name.".
I don't see where I went wrong.
Can somebody help, please?
You're not showing the definition of clsNode, neither whether you have a forward declaration for it, but I'm pretty sure this:
m_RootNode *clsNode;
m_LastNode *clsNode;
Should be rewritten this way:
clsNode* m_RootNode;
clsNode* m_LastNode;
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Closed 10 years ago.
Why is it not possible to supply a default value that is defined in the parameter list for a struct? That is, why does this work
struct C {int i;};
C cc = {0};
foo(C c=cc) {}
but not
foo(C c={0}) {}
Note, I've noticed that the same holds true for arrays.
Ok, it seems this is a compiler problem with the older GCC.
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Closed 10 years ago.
I've seen a pretty strange (for me) usage of this method:
strncpy(somePointer,"%d",someInt);
What does this actually do? The integer specifier "%d" as the source is troublesome for me to understand.
It does what it says on the tin: It copies the literal string "%d" into a char buffer pointed to by somePointer, or at least the first someInt bytes of it (up to three).
Don't be upset by a percentage sign, it's just another character...
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Closed 11 years ago.
[a-zA-Z0-9-_]{3,} this is my currently using regular expression in login page. I would like to allow space in the regexp. How can i do it? I'm lack of knowledge in RegExp.
This is just a character class, so just add space at the end of the class: [a-zA-Z0-9_ -]{3,}
How about:
[a-zA-Z0-9-_\s]{3,}
This will allow all forms of whitespace...