On 16/10/2009, at 11:54 AM, Frederick C. Lee wrote:
Both seem to work the same.
Is there any benefit of (1) over (2) or is it merely style of
programming?
(1) isn't really an alternative way of implementing a method, it's
just that the trailing semicolon is ignored. I'm not even sure if it's
deliberately allowed (it wouldn't be for a C function) or merely an
artifact of the way Obj-C is parsed.
-(void) foo
{
}
and
- (void) foo {
}
are both perfectly valid ways of defining any block in C and always
have been (though I personally abhor the second style yet seem to be
ploughing my own furrow on that one - almost everyone uses it :(
The ignored trailing semicolon is sort of useful when fleshing out the
body of a class that you've declared methods for in the header - you
need the semicolon for the method's prototypes, so you can cut and
paste the prototype into the main body and just add a trailing block
to implement the method - the semicolon doesn't have to be removed.
However, again a personal thing, I prefer it not to be there so it's
consistent with ordinary C functions, and provided you are just
fleshing out the body from the headers for the first time (i.e. no
other code has yet been written) doing a search/replace of ';' for '\n
{\n\n\n}\n\n' is a useful way to convert all your header methods into
bodies ready to be filled in with code.
--Graham
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