|  | Improper use of std::map? | | |
| | | Hakusa@gmail.com |  |
|  Posted: Thu Sep 04, 2008 8:16 am Post subject: Improper use of std::map? |  |
| |  | |
OK, I have the bellow code which give me an error (see the comment).
#pragma once
#include <map>
#include <string>
using std::string;
class Actor
{
public:
unsigned int hp;
Actor( const unsigned int _hp )
: hp( _hp )
{
}
Actor()
: hp( 0 )
{
}
virtual ~Actor();
virtual void act() = 0;
};
typedef std::map<string,Actor*> ActT;
typedef ActT::iterator ActIt;
ActT actors;
class Player : public Actor
{
public:
Player( const unsigned int _hp )
: Actor( _hp )
{
}
Player()
: Actor( 0 )
{
}
void act();
};
// TESTING //
actors[ "Player1" ] = new Player( 100 ); // ERROR: Expected
conversion, constructor, destructor before "=".
class Enemy : public Actor
{
public:
void act();
};
Is this not proper use of the sdt::map? I was thinking it's EXACTLY
the right use (or that it's exactly what I want to use), but I can't
figure out this error. Thanks in advance.
{ Isn't it because the expression statement is in the namespace scope?
Enclose it in a function body, and that gives me no error. -mod/sk }
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| |
| | | Zara | |
| | Posted: Thu Sep 04, 2008 9:28 am Post subject: Re: Improper use of std::map? | |
| | | |
On Thu, 4 Sep 2008 02:16:46 CST, "Hakusa@gmail.com"
<Hakusa@gmail.com> wrote:
| Quote: | OK, I have the bellow code which give me an error (see the comment).
#pragma once
#include <map
#include <string
using std::string;
class Actor
...
typedef std::map<string,Actor*> ActT;
|
You should use a shared_ptr instead of a raw pointer to be sure the
resources are not lost, and are copiable.
| Quote: | typedef ActT::iterator ActIt;
ActT actors;
class Player : public Actor
...
// TESTING //
actors[ "Player1" ] = new Player( 100 ); // ERROR: Expected
|
This line is outside any function. That is the reason of the error:
Map is initialized at definiton, but individual elements must be
initialized within a function
<...>
| Quote: | Is this not proper use of the sdt::map? I was thinking it's EXACTLY
the right use (or that it's exactly what I want to use), but I can't
figure out this error. Thanks in advance.
See above |
best regards,
Zara
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