On Saturday, 28 January 2017 at 14:56:03 UTC, rikki cattermole
wrote:
On 29/01/2017 3:51 AM, Nestor wrote:
Hi,
One can get the length of a string easily, however since
strings are
UTF-8, sometimes characters take more than one byte. I would
like to
know then how many bytes does a string take, but this code
didn't work
as I expected:
import std.stdio;
void main() {
string mystring1;
string mystring2 = "A string of just 48 characters for
testing size.";
writeln(mystring1.sizeof);
writeln( mystring2.sizeof);
}
In both cases the size is 8, so apparently sizeof is giving me
just the
default size of a string type and not the size of the variable
in
memory, which is what I want.
Ideas?
A few misconceptions going on here.
A string element is not a grapheme it is a character which is
one byte.
So what you want is mystring.length
Now sizeof is not telling you about the elements, its telling
you how big the reference to it is. Specifically length +
pointer. It would have been 16 if you compiled in 64bit mode
for example.
If you want to know about graphemes and code points that is
another story.
For that you'll want std.uni[0] and std.utf[1].
[0] http://dlang.org/phobos/std_uni.html
[1] http://dlang.org/phobos/std_utf.html
I do not want string lenth or code points. Perhaps I didn't
explain myselft.
I want to know variable size in memory. For example, say I have
an UTF-8 string of only 2 characters, but each of them takes 2
bytes. string length would be 2, but the content of the string
would take 4 bytes in memory (excluding overhead for type size).
How can I get that?
