Is it legal to call functions in the initializer list?

[Matthias]

Hi,

I often do things like this:

class A
{
....
};

A::A()
: some_member( foo() ), // init some_member with return value of foo()
some_other_member( bar() ) // same
{}

Is this considered bad style or even illegal? I found it to be very handy.

 

[Karl Heinz Buchegger]

Hi,

I often do things like this:

class A
{
...
};

A::A()
: some_member( foo() ), // init some_member with return value of foo()
some_other_member( bar() ) // same
{}

Is this considered bad style or even illegal? I found it to be very handy.

It is legal.

Bad style is in the eye of the beholder. I wouldn't consider it bad.

 

[Aslan Kral]

Here is a code that created some problems for me. I solved it by changing
the way it was initialized.
See the commented lines. Debug build was OK. Release build created problems
sometimes.
Sometimes it was OK. It took me sometime to find out what was the problem.

struct SCtxSetList {
SCtxSet<SCtxx>** __ppm0;
uint __nx : 9;
uint __nxIncrement : 5;
SCtxSetList()
:
//__nxIncrement(2), //Detected an optimization problem here
__nxIncrement(0),//fix
//__ppm0(new SCtxSet<SCtxx>* [1 << __nxIncrement]), //Detected an
optimization problem here
__ppm0(new SCtxSet<SCtxx>* [1]), //fix
__nx(0)
{
uint nxIncrement = 1 << __nxIncrement;
memset(__ppm0, 0, nxIncrement * sizeof(SCtxSet<SCtxx>*));
}
....