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Re: [Tinycc-devel] Strange sizeof construct
From: |
Fred Weigel |
Subject: |
Re: [Tinycc-devel] Strange sizeof construct |
Date: |
Fri, 23 Nov 2007 08:57:06 -0500 |
Yes, [] can be applied to any pointer. But, it is an operator, like "+".
So, a[i], is an operation involving a and i. In fact, it IS the operation
+. a[i] is *(a + i)
Now *(a + i) is the same as *(i + a). And thus, a[i] is the same as i[a].
Now, a is the same as a pointer, so we can write i[p]. And, we know that the
constant 0 is a pointer, so we can have i[0].
Which means that (eg.) 5[0] and 0[5] may be valid constructs (but, they have
"void" type, so the de-reference should fail!).
Hope that helps,
Fred.
- Re: [Tinycc-devel] Strange sizeof construct, (continued)