Re: inline vs macro

junky_fellow@xxxxxxxxxxx a écrit :
hi guys,

Can you please suggest that in what cases should a macro be
preferred over inline function and viceversa ? Is there any case where
using a macro will be more efficient as compared to inline function ?

thanks for any help in advance ...


#define max(a,b) ((a<b)?b:a)

Defining an inline function(s) for that would be
quite difficult...

The same for min(a,b)

Other "advantages" of macros is that they can capture
local variables in the calling function:

#define myhack(a) (a+sqrt(var))

void fn(double var)
{
int a;

...
myhack(a);
...
}

You see? The argument var is implicitely passed
to the macro.

On the other hand:

An advantage of inline functions is that they
do not capture local variables in the calling
function:

inline double myhack(int a)
{
return a+sqrt(var);
// This "var" refers to a global variable var,
// NOT to a local variable. This avoids
// UNINTENTIONAL problems with local
// variables
}
.

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