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whats the ## in #ifdef 1

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sachindn

sachindn

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Jun 27, 2000
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Hi All,
#define VCALL(OX, CX, MX) (*((CX##Class)(((Object)(OX))->__vptr))->MX)((CX)(OX)
In the above line whats the meaning of using ##?
Thanks
 
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I'm no C expert, but I think that ## concatenates literals:

Code: 
#define VCALL(OX, CX, MX)   (*((CX##Class)(((Object)(OX))->__vptr))->MX)((CX)(OX)
:
:
:
VCALL (ox1, cx1, mx1)

becomes:

(*(([COLOR=blue]cx1Class[/color])(((Object)(ox1))->__vptr))->mx1)((cx1)(ox1)

Theophilos.

-----------

There are only 10 kinds of people: Those who understand binary and those who don't.
 
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