Questions tagged [mem-fun]
29 questions
11
votes
4 answers
some practical uses of mem_fn & bind
Can someone recommend some cool practical uses of tr1's mem_fn and bind utilities? I don't need esoteric c++ for library development. just some application level coding which makes uses of these.
any help will be very appreciated.
Fanatic23
- 3,378
- 2
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- 51
10
votes
4 answers
referencing a member function with bind1st and mem_fun
I have a C++ class where I'm trying to use std::bind1st to bind a member function to the 'this' parameter. For example:
class MyClass
{
public:
void Foo()
{
using namespace std;
// this works fine
this->Bar();
//…
PaulH
- 7,759
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4
votes
2 answers
C++ forcing mem_fun to select a specific overloaded member function
I've actually figured out how to do what the title to my question suggests, but not in a satisfactory and portable way. Let me be more specific.
This is a stripped down and modified version of my code:
#include
#include…
MPortilheiro
- 128
- 8
4
votes
1 answer
C++ To call member function in for_each for items in the member container
If I have a class (that mimic some of STL's container) like this:
class Elem {
public:
void prepare(); // do something on *this
// ...
};
class Selector {
public:
typedef vector container_type;
typedef container_type::iterator…
cinsk
- 1,576
- 2
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- 14
4
votes
3 answers
storing mem_fun in a standard container
Is there a way to create a vector< mem_fun_t< ReturnType, MyClass > > ?
The error i'm seeing is:
error C2512: 'std::mem_fun1_t<_Result,_Ty,_Arg>' : no appropriate default constructor available
Vargas
- 2,125
- 2
- 33
- 53
3
votes
4 answers
How to assign method member pointer of a subclass?
My problem is a bit complicated.
I have one class (e: Component) which have Ports objects.
When a Component create a Port object, it pass one of its methods to the Port constructor.
Methods signatures :
typedef std::vector…
Neozaru
- 1,109
- 1
- 10
- 25
3
votes
1 answer
Can I use boost::bind() with mem_fun_ref()?
My question is pretty straightforward: can I do something like this?
Say class foo contains the following member function:
foo foo::DoSomething(input_type1 input1, input_type2 input2)
{
... // Adjust private datamembers
return…
Wouter
- 161
- 1
- 6
2
votes
4 answers
STL for_each complaining about argument list
As part of a homework assignment, we are supposed to map the occurrence of each character in a map. Our function is supposed to use std::for_each and pass in the character to be evaluated.
My function is:
std::for_each(document_.begin(),
…
IAE
- 2,213
- 13
- 37
- 71
2
votes
3 answers
How do I use std::tr1::mem_fun in Visual Studio 2008 SP1?
The VS2008 SP1 documentation talks about std::tr1::mem_fun.
So why, when I try and use std::tr1::mem_fun, why do I get this compile error?:
'mem_fun' : is not a member of 'std::tr1'
At the same time, I can use std::tr1::function without…
mackenir
- 10,801
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2
votes
5 answers
How to have memfun with two parameters
I want to use this function "EnumWindows(EnumWindowsProc, NULL);".
The EnumWindowsProc is a Callback function:
BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam);
For this callback I want to use a member function of a class.
e.g:
Class…
Jaguar
- 339
- 2
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- 9
2
votes
2 answers
mem_fun and bind1st problem
I've following class:
class A {
public:
// ctr and etc ...
A* clone(B* container);
};
Now, I've a vector availableObjs populated already. I want to call clone on each of those, so and insert cloned objects into a new container clonedObjs of…
soumeng78
- 600
- 7
- 12
1
vote
1 answer
void troubles return value to string
Based on this article, I tried to create a generic parser, which outputs the return value of the called function as a string.
Parsing std::vector of std::strings into std::tuple of arbitrary types
Unfortunately, I didn't figure out, how to format…
PirklW
- 484
- 2
- 16
1
vote
2 answers
Using std::vector::push_back with std::mem_fun and std::bind1st
I'm trying to use std::vector::push_back with std::mem_fun and std::binder1st, but it doesnt seem to be feasible, can this be done?
I've tried to exemplify with the code below.
#include
#include
#include
using…
Vargas
- 2,125
- 2
- 33
- 53
1
vote
2 answers
C++: Creating a function object with mem_fn and bind1st
Disclaimer: This description contains a lot of Qt specific functionality. This is not necessary to answer the question, I'm just including it to explain the background.
I need to do some heavy computations in my QT application.
In order to do this,…
lhk
- 27,458
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1
vote
1 answer
Must I use boost::bind to create polymorphic "transform" functionality?
I am trying to call a member function on each object in a vector, with a specified parameter, and I would like the call to be polymorphic. I believe the function vstuff shown below achieves this. But can vstuff be modified to take a vector<…
imateapot
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