On Monday, 12 February 2018 at 05:37:23 UTC, ketmar wrote:
Norm wrote:
Hi,
I'm new to D so can someone explain to me what is happening
here?
void func(const char* s, char** e) {
import core.stdc.stdlib;
auto result = strtod(s, e);
}
Error: function core.stdc.stdlib.strtod (scope inout(char)*
nptr, scope inout(char)** endptr) is not callable using
argument types (const(char*), char**)
there is a difference between `const char* s`, and
`const(char)* s`.
the former means that both `s` and `*s` cannot change, the
latter means that `s` can be changed, but `*s` cannot. i.e. the
first form means that you cannot do pointer arithmetic with
`s`, while with second form you can (only *contents* are const,
not the pointer itself).
that is, `strtod` wants const *contents*, but not pointer.
`const(char)* s`.
I tried variations of const (char)* s, ... etc. and then stupidly
realised the problem was with the second parameter 'e'. inout
does behave the way I expected, I was just looking at the wrong
parameter.
My silly mistake but thanks for your reply.
Cheers,
Norm
