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version 2.108.0

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Alias std.stdio.stdout

The standard output stream.

alias stdout = makeGlobal!(StdFileHandle.stdout);

Returns

stdout as a File.

Note

The returned File wraps stdout, and is therefore thread global. Reassigning stdout to a different File must be done in a single-threaded or locked context in order to avoid race conditions.

All writing to stdout automatically locks the file globally, and will cause all other threads calling write to wait until the lock is released.

Example

void main()
{
    stdout.writeln("Write a message to stdout.");
}

Example

void main()
{
    import std.algorithm.iteration : filter, map, sum;
    import std.format : format;
    import std.range : iota, tee;

    int len;
    const r = 6.iota
              .filter!(a => a % 2) // 1 3 5
              .map!(a => a * 2) // 2 6 10
              .tee!(_ => stdout.writefln("len: %d", len++))
              .sum;

    writeln(r); // 18
}

Example

void main()
{
    import std.algorithm.mutation : copy;
    import std.algorithm.iteration : map;
    import std.format : format;
    import std.range : iota;

    10.iota
    .map!(e => "N: %d".format(e))
    .copy(stdout.lockingTextWriter()); // the OutputRange
}

Authors

Walter Bright, Andrei Alexandrescu, Alex Rønne Petersen

License

Boost License 1.0.