On Wednesday, 25 March 2015 at 15:44:50 UTC, Hugo wrote:
Hi,
I need to append an uint as an array of ubytes (in little
endian) to an existing array of ubytes. I tried to compile this
code (with dmd 2.066.1 under Windows 7 x86-64):
void main() {
ubyte[] buffer = [0x1f, 0x8b, 0x08, 0x00];
import std.system;
import std.datetime : Clock, stdTimeToUnixTime;
import std.bitmanip : append;
buffer.append!ubyte(cast(uint)stdTimeToUnixTime(Clock.currStdTime),
Endian.littleEndian);
}
But it gives me this error: template std.bitmanip.append cannot
deduce function from argument types !(ubyte)(ubyte[], uint,
Endian)
Supposedly append "Takes an integral value, converts it to the
given endianness, and appends it to the given range of ubytes
(using put) as a sequence of T.sizeof ubytes", so I thought I
could use it, but after reading the documentation page for the
function and the examples, I honestly can't understand where is
the problem is.
Please, help!
Regards, Hugo
As per the signature in the docs:
void append(T, Endian endianness = Endian.bigEndian, R)(R range,
T value)
The endianness is the second template argument. What you need to
write is
buffer.append!(uint,
Endian.littleEndian)(cast(uint)stdTimeToUnixTime(Clock.currStdTime));
or
append!(uint, Endian.littleEndian)(buffer,
cast(uint)stdTimeToUnixTime(Clock.currStdTime));
Note that you don't need to specify the third template argument,
that will be inferred automatically from the type of `buffer`
