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version 2.109.1

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Function std.bitmanip.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 starting at index. hasSlicing!R must be true.

void append(T, Endian endianness = Endian.bigEndian, R) (
  R range,
  const T value
)
if (canSwapEndianness!T && isOutputRange!(R, ubyte));

Parameters

NameDescription
T The integral type to convert the first T.sizeof bytes to.
endianness The endianness to write the bytes in.
range The range to append to.
value The value to append.

Example

import std.array;
auto buffer = appender!(const ubyte[])();
buffer.append!ushort(261);
writeln(buffer.data); // [1, 5]

buffer.append!uint(369700095u);
writeln(buffer.data); // [1, 5, 22, 9, 44, 255]

buffer.append!ubyte(8);
writeln(buffer.data); // [1, 5, 22, 9, 44, 255, 8]

Example

bool 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

buffer.append!bool(true);
writeln(buffer.data); // [1]

buffer.append!bool(false);
writeln(buffer.data); // [1, 0]

Example

char wchar dchar 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

buffer.append!char('a');
writeln(buffer.data); // [97]

buffer.append!char('b');
writeln(buffer.data); // [97, 98]

buffer.append!wchar('ą');
writeln(buffer.data); // [97, 98, 1, 5]

buffer.append!dchar('ą');
    writeln(buffer.data); // [97, 98, 1, 5, 0, 0, 1, 5]

Example

float double 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

buffer.append!float(32.0f);
writeln(buffer.data); // [66, 0, 0, 0]

buffer.append!double(32.0);
writeln(buffer.data); // [66, 0, 0, 0, 64, 64, 0, 0, 0, 0, 0, 0]

Example

enum 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

enum Foo
{
    one = 10,
    two = 20,
    three = 30
}

buffer.append!Foo(Foo.one);
writeln(buffer.data); // [0, 0, 0, 10]

buffer.append!Foo(Foo.two);
writeln(buffer.data); // [0, 0, 0, 10, 0, 0, 0, 20]

buffer.append!Foo(Foo.three);
writeln(buffer.data); // [0, 0, 0, 10, 0, 0, 0, 20, 0, 0, 0, 30]

Example

enum - bool 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

enum Bool: bool
{
    bfalse = false,
    btrue = true,
}

buffer.append!Bool(Bool.btrue);
writeln(buffer.data); // [1]

buffer.append!Bool(Bool.bfalse);
writeln(buffer.data); // [1, 0]

buffer.append!Bool(Bool.btrue);
writeln(buffer.data); // [1, 0, 1]

Example

enum - float 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

enum Float: float
{
    one = 32.0f,
    two = 25.0f
}

buffer.append!Float(Float.one);
writeln(buffer.data); // [66, 0, 0, 0]

buffer.append!Float(Float.two);
writeln(buffer.data); // [66, 0, 0, 0, 65, 200, 0, 0]

Example

enum - double 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

enum Double: double
{
    one = 32.0,
    two = 25.0
}

buffer.append!Double(Double.one);
writeln(buffer.data); // [64, 64, 0, 0, 0, 0, 0, 0]

buffer.append!Double(Double.two);
writeln(buffer.data); // [64, 64, 0, 0, 0, 0, 0, 0, 64, 57, 0, 0, 0, 0, 0, 0]

Example

enum - real 

import std.array : appender;
auto buffer = appender!(const ubyte[])();

enum Real: real
{
    one = 32.0,
    two = 25.0
}

static assert(!__traits(compiles, buffer.append!Real(Real.one)));

Authors

Walter Bright, Andrei Alexandrescu, Jonathan M Davis, Alex Rønne Petersen, Damian Ziemba, Amaury SECHET

License

Boost License 1.0.