On Jun 25, 2007, at 4:59 PM, Kevin Yohe wrote:
Hi,
I am trying to define a constant table that can be initialized at
compile-time and linked into ROM. I had envisioned two ways of
defining
this; either
struct sAggregate
{
int m0;
int m1;
int m2;
int m3;
};
const sAggregate table1[] =
{ { 0, 0, 0, 0 },
{ 1, 1, 1, 1 },
{ 2, 2, 2, 2 },
{ 3, 3, 3, 3 }
};
As a POD type, this initialization is called static initialization
(from constants) , which shall be
performed at compile time (most implementation).
or
struct sConstruct
{
int m0;
int m1;
int m2;
int m3;
sConstruct( a0, a1, a2, a3 )
: m0(a0), m1(a1), m2(a2), m3(a3)
{};
};
const sConstruct table2[] =
{ sConstruct( 0, 0, 0, 0 ),
sConstruct( 1, 1, 1, 1 ),
sConstruct( 2, 2, 2, 2 ),
sConstruct( 3, 3, 3, 3 )
};
On the contrary, this is not a POD type (user_declared constructors)
, and is dynamic initialization happening at run time.
'cause this direct initialization might involve constructor resolution.
Am I rit?
