RE: err, XLOG/UW711/cc/Doesn't compile.

I wrote:

> Mikheev, Vadim writes:
>
> > > more info. It seems to not like the following from
> > > src/include/buffer/bufpage.h (line 305):
> > > #define PageSetLSN(page, lsn) \
> > > (((PageHeader) (page))->pd_lsn = (XLogRecPtr) (lsn))
> > >
> > > I'm not sure what it's trying to do...
> >
> > Just assign values to 8 bytes structure in pageheader.
>
> It's because XLogRecPtr is a struct. You can't assign structs with
> '='. Gotta use memcpy, etc.

Correction: It's because the compiler won't let you cast to a
struct. Assigning seems to compile okay.

This code fails to compile:

| typedef struct foo { int a; int b; } foo;
|
| main() {
| foo x;
| (foo) x;
| }

--
Peter Eisentraut peter_e(at)gmx(dot)net http://yi.org/peter-e/