Re: Porting C to C++
On 22 mai, 20:43, Paul <paul.delamus...@gmail.com> wrote:
Hi,
I am porting a piece of code from C to C++. The C code has a macro
like this:
#define MALLOC(p, b, s) {if ((b) > 0) { \
p= malloc(b); if (!(p)) { \
fprintf(stderr, "memory allocation error:
%s\n", s); \
exit(0);}} else p= NULL;}
the g++ compiler complains about "invalid conversion from void* to"
xxx* because of the lack of a cast in front of p.
Is there a way to fix this macro so that it can work in C++?
You could use template functions.
template<typename T>
void MALLOC(T*& p, size_t b, const char* s)
{
if ((b) > 0)
{
p = malloc(b);
if(!p) {
fprintf(stderr, "memory allocation error: %s\n", s);
exit(0);
}
}
else
p = NULL;
}
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