Re: Initializing STL vector in a header class

From:

"alex" <alex.shulgin@gmail.com>

Newsgroups:

comp.lang.c++.moderated

Date:

4 Oct 2006 09:13:17 -0400

Message-ID:

<1159959197.209172.264840@b28g2000cwb.googlegroups.com>

rgs424@gmail.com wrote:
[...]

just fine. If I place that exact same line in a header file, I get a
compilation error ("unexpected constants").

CVector
{
public:
vector<int> myvec(5,24); // --> causes COMPILE error !!
};

The compiler probably have parsed up to `myvec(' and now thinks it is a
declaration of a member function returning `vector<int>' (try
`vector<int> myvec()'-- it should compile cleanly). Next, it sees `5'
but expects a type hence the error message "unexpected constants".

Can someone explain why an compiler error occurs when this is declared
in a class header file ?

Nothing to do with header file. If you want member initialization
define a constructor like this:

class CVector
{
public:
    CVector(void)
        : myvec(5, 24)
    {
    }
private:
    std::vector< int > myvec;
};

It is most certainly of no use to hardcode these values into
constructor, but it compiles :)
Static integral constants, however may be initialized in the class
declaration like this:

class Statics
{
    static int const g_one = 1;
};

Alex

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