What does this syntax mean?

[Giuseppe:G:]

Hi, the following piece of code is rather obscure for me

struct Foo
{
Foo( int _x ) : x(_x) {}
....
};

what's the meaning of that construct? I understand Foo() must be a
constructor, right? But then what's with the syntax after the ":" ??

Thanks!
Giuseppe

[Ian Collins]

Giuseppe:G: wrote:

Hi, the following piece of code is rather obscure for me

struct Foo
{
Foo( int _x ) : x(_x) {}
....
};

what's the meaning of that construct? I understand Foo() must be a
constructor, right? But then what's with the syntax after the ":" ??

Look up initialiser lists.

--
Ian Collins.

[=?utf-8?Q?David_C=C3=B4me?=]

On Sun, 22 Jun 2008 21:02:45 +0200, G: <gi***************@spamgmail.com>
wrote:

Hi, the following piece of code is rather obscure for me

struct Foo
{
Foo( int _x ) : x(_x) {}
...
};

what's the meaning of that construct? I understand Foo() must be a
constructor, right? But then what's with the syntax after the ":" ??

Thanks!
Giuseppe

Search "initialization lists" on google.

[Tim Slattery]

Giuseppe:G: <gi***************@SPAMgmail.comwrote:

>Hi, the following piece of code is rather obscure for me

struct Foo
{
Foo( int _x ) : x(_x) {}
...
};

Foo takes an integer argument. the :x(_x) says to initialize the
member variable x using the argument _x. "{}" says that the body of
the method is empty, that is, the initialization is the only thing
that the constructor does.

--
Tim Slattery
Sl********@bls.gov
http://members.cox.net/slatteryt