Re: Creating unary function by binding-2nd to class member

From:

"Alf P. Steinbach" <alfps@start.no>

Newsgroups:

comp.lang.c++

Date:

Tue, 20 Feb 2007 10:05:46 +0100

Message-ID:

<53vrvdF1u70rbU1@mid.individual.net>

* Marcin Gil:

Hi!

I have the code like this
(obvious things like ctor/dtor removed)

typedef struct

'typedef' of 'struct' is a C'ism: don't.

_NODE

Names starting with underscore followed by uppercase letter are reserved
to the implemention, not to be used by you.

Anyway, use all uppercase names for macros and macros only.

{
int val;
int index;
} Node;

struct A:

Syntax error.

{
  std::vector<Node*> Nodes;

  bool EqIndex(const Node* ptr, int idx) const
    { return ptr->index == idx; };

Since this function doesn't access anything of the object it's called
on, it doesn't seem likely that it should be a non-static member function.

int foo();
}

Missing semicolon.

I would like to write like this:

int A::foo()
{
  ...
  std::find_if(Nodes.begin(), Nodes.end(), bind2nd(&A:EqIndex, 5));
  ...
}

Well, first fix the code, then try again.

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