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Alias std.stdio.stderr

The standard error stream.

alias stderr = makeGlobal!(StdFileHandle.stderr);


stderr as a File.


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

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


void main()
    stderr.writeln("Write a message to stderr.");


Walter Bright, Andrei Alexandrescu, Alex Rønne Petersen


Boost License 1.0.