Menu
Search

API Documentation

version 2.109.1

overview

View source code
Display the source code in std/stdio.d from which this page was generated on github.
Report a bug
If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page
Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

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.