Hi, John,
Thanks for reply and the information is very helpful.
However, to clarify a bit, I don't think it's a valid C99 code.
According to gcc manual,
http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Designated-Inits.html#Designated-Inits
..
To initialize a range of elements to the same value, write `[first ...
last] = value'. This is a GNU extension. For example,
int widths[] = { [0 ... 9] = 1, [10 ... 99] = 2, [100] = 3 };
..
Thanks.
Mike
----- Original Message -----
From: "John Love-Jensen" <eljay@xxxxxxxxx>
To: "Michael Gong" <gonwg@xxxxxxxxxxx>; "MSX to GCC"
<gcc-help@xxxxxxxxxxx>
Sent: Wednesday, March 28, 2007 9:19 AM
Subject: Re: what's this syntax ?
Hi Michael,
I think the '...' is called an ellipsis in the array initializer.
So you can do something like:
int array[10] = { [4] = 9, [1 ... 2] = 88, [7 ... 9] = 1 };
It's valid C99 code.
IIRC, it's *NOT* valid C90 or C++98 code. (I'm not sure if GCC
provides
convenience extensions that you may have to disable in a C90 or C++98
environment.)
You may find this output of interest:
gcc -S test.c
cat test.s
HTH,
--Eljay
