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Function `std.stdio.File.lockingBinaryWriter`

Returns an output range that locks the file and allows fast writing to it.


						std.stdio.File.BinaryWriterImpl!(true) lockingBinaryWriter();

Example

Produce a grayscale image of the Mandelbrot set in binary Netpbm format to standard output.

import std.algorithm, std.complex, std.range, std.stdio;

void main()
{
    enum size = 500;
    writef("P5\n%d %d %d\n", size, size, ubyte.max);

    iota(-1, 3, 2.0/size).map!(y =>
        iota(-1.5, 0.5, 2.0/size).map!(x =>
            cast(ubyte)(1+
                recurrence!((a, n) => x + y * complex(0, 1) + a[n-1]^^2)(complex(0))
                .take(ubyte.max)
                .countUntil!(z => z.re^^2 + z.im^^2 > 4))
        )
    )
    .copy(stdout.lockingBinaryWriter);
}

Authors

Walter Bright, Andrei Alexandrescu, Alex Rønne Petersen

License

Boost License 1.0.